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Hammer AJ, Gaulke CA, Garcia-Jaramillo M, Leong C, Morre J, Sieler MJ, Stevens JF, Jiang Y, Maier CS, Kent ML, Sharpton TJ. Gut microbiota metabolically mediate intestinal helminth infection in zebrafish. mSystems 2024; 9:e0054524. [PMID: 39191377 PMCID: PMC11406965 DOI: 10.1128/msystems.00545-24] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2024] [Accepted: 07/29/2024] [Indexed: 08/29/2024] Open
Abstract
Intestinal helminth parasite (IHP) infection induces alterations in the composition of microbial communities across vertebrates, although how gut microbiota may facilitate or hinder parasite infection remains poorly defined. In this work, we utilized a zebrafish model to investigate the relationship between gut microbiota, gut metabolites, and IHP infection. We found that extreme disparity in zebrafish parasite infection burden is linked to the composition of the gut microbiome and that changes in the gut microbiome are associated with variation in a class of endogenously produced signaling compounds, N-acylethanolamines, that are known to be involved in parasite infection. Using a statistical mediation analysis, we uncovered a set of gut microbes whose relative abundance explains the association between gut metabolites and infection outcomes. Experimental investigation of one of the compounds in this analysis reveals salicylaldehyde, which is putatively produced by the gut microbe Pelomonas, as a potent anthelmintic with activity against Pseudocapillaria tomentosa egg hatching, both in vitro and in vivo. Collectively, our findings underscore the importance of the gut microbiome as a mediating agent in parasitic infection and highlight specific gut metabolites as tools for the advancement of novel therapeutic interventions against IHP infection. IMPORTANCE Intestinal helminth parasites (IHPs) impact human health globally and interfere with animal health and agricultural productivity. While anthelmintics are critical to controlling parasite infections, their efficacy is increasingly compromised by drug resistance. Recent investigations suggest the gut microbiome might mediate helminth infection dynamics. So, identifying how gut microbes interact with parasites could yield new therapeutic targets for infection prevention and management. We conducted a study using a zebrafish model of parasitic infection to identify routes by which gut microbes might impact helminth infection outcomes. Our research linked the gut microbiome to both parasite infection and to metabolites in the gut to understand how microbes could alter parasite infection. We identified a metabolite in the gut, salicylaldehyde, that is putatively produced by a gut microbe and that inhibits parasitic egg growth. Our results also point to a class of compounds, N-acyl-ethanolamines, which are affected by changes in the gut microbiome and are linked to parasite infection. Collectively, our results indicate the gut microbiome may be a source of novel anthelmintics that can be harnessed to control IHPs.
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Affiliation(s)
- Austin J Hammer
- Department of Microbiology, Oregon State University, Oregon, USA
| | - Christopher A Gaulke
- Department of Pathobiology, University of Illinois Urbana Champaign, Illinois, USA
| | | | - Connor Leong
- Department of Microbiology, Oregon State University, Oregon, USA
- Department of Biomedical Sciences, Oregon State University, Corvallis, Oregon, USA
| | - Jeffrey Morre
- Department of Chemistry, Oregon State University, Oregon, USA
| | - Michael J Sieler
- Department of Microbiology, Oregon State University, Oregon, USA
| | - Jan F Stevens
- Department of Pharmaceutical Sciences, Oregon State University, Oregon, USA
- Linus Pauling Institute, Oregon State University, Oregon, USA
| | - Yuan Jiang
- Department of Statistics, Oregon State University, Oregon, USA
| | - Claudia S Maier
- Department of Chemistry, Oregon State University, Oregon, USA
| | - Michael L Kent
- Department of Microbiology, Oregon State University, Oregon, USA
| | - Thomas J Sharpton
- Department of Microbiology, Oregon State University, Oregon, USA
- Department of Statistics, Oregon State University, Oregon, USA
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2
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Hammer AJ, Gaulke CA, Garcia-Jaramillo M, Leong C, Morre J, Sieler MJ, Stevens JF, Jiang Y, Maier CS, Kent ML, Sharpton TJ. Gut microbiota metabolically mediate intestinal helminth infection in Zebrafish. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.07.26.605207. [PMID: 39091873 PMCID: PMC11291147 DOI: 10.1101/2024.07.26.605207] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 08/04/2024]
Abstract
Intestinal helminth parasite (IHP) infection induces alterations in the composition of microbial communities across vertebrates, although how gut microbiota may facilitate or hinder parasite infection remains poorly defined. In this work we utilized a zebrafish model to investigate the relationship between gut microbiota, gut metabolites, and IHP infection. We found that extreme disparity in zebrafish parasite infection burden is linked to the composition of the gut microbiome, and that changes in the gut microbiome are associated with variation in a class of endogenously-produced signaling compounds, N-acylethanolamines, that are known to be involved in parasite infection. Using a statistical mediation analysis, we uncovered a set of gut microbes whose relative abundance explains the association between gut metabolites and infection outcomes. Experimental investigation of one of the compounds in this analysis reveals salicylaldehyde, which is putatively produced by the gut microbe Pelomonas, as a potent anthelmintic with activity against Pseudocapillaria tomentosa egg hatching, both in vitro and in vivo. Collectively, our findings underscore the importance of the gut microbiome as a mediating agent in parasitic infection and highlights specific gut metabolites as tools for the advancement of novel therapeutic interventions against IHP infection.
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Affiliation(s)
| | - Chris A. Gaulke
- Department of Pathobiology, University of Illinois Urbana Champaign
| | | | - Connor Leong
- Department of Microbiology, Oregon State University
| | | | | | - Jan F. Stevens
- Department of Pharmaceutical Sciences, Oregon State University
- Linus Pauling Institute, Oregon State University
| | - Yuan Jiang
- Department of Statistics, Oregon State University
| | | | | | - Thomas J. Sharpton
- Department of Microbiology, Oregon State University
- Department of Statistics, Oregon State University
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3
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Skinner M, Hazell M, Jameson J, Lougheed SC. Social networks reveal sex- and age-patterned social structure in Butler's gartersnakes ( Thamnophis butleri). Behav Ecol 2024; 35:arad095. [PMID: 38193014 PMCID: PMC10773305 DOI: 10.1093/beheco/arad095] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Revised: 10/10/2023] [Accepted: 11/10/2023] [Indexed: 01/10/2024] Open
Abstract
Sex- and age-based social structures have been well documented in animals with visible aggregations. However, very little is known about the social structures of snakes. This is most likely because snakes are often considered non-social animals and are particularly difficult to observe in the wild. Here, we show that wild Butler's Gartersnakes have an age and sex assorted social structure similar to more commonly studied social animals. To demonstrate this, we use data from a 12-year capture-mark-recapture study to identify social interactions using social network analyses. We find that the social structures of Butler's Gartersnakes comprise sex- and age-assorted intra-species communities with older females often central and age segregation partially due to patterns of study site use. In addition, we find that females tended to increase in sociability as they aged while the opposite occurred in males. We also present evidence that social interaction may provide fitness benefits, where snakes that were part of a social network were more likely to have improved body condition. We demonstrate that conventional capture data can reveal valuable information on social structures in cryptic species. This is particularly valuable as research has consistently demonstrated that understanding social structure is important for conservation efforts. Additionally, research on the social patterns of animals without obvious social groups provides valuable insight into the evolution of group living.
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Affiliation(s)
- Morgan Skinner
- Department of Psychology, Wilfrid Laurier University, 75 University Ave West, Waterloo, ON N2L 3C5, Canada
| | - Megan Hazell
- Department of Biology, Queen’s University, 99 University Ave, Kingston, ON K7L 3N6, Canada
| | - Joel Jameson
- WSP, 1600 Boulevard Rene-Levesque West, 11th floor, Montreal, QC H3H 1P9, Canada
| | - Stephen C Lougheed
- Department of Biology, Queen’s University, 99 University Ave, Kingston, ON K7L 3N6, Canada
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4
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Tandan S, Kshetri S, Paudel S, Dhakal P, Kyes RC, Khanal L. Prevalence of gastrointestinal helminth parasites in rhesus macaques and local residents in the central mid-hills of Nepal. Helminthologia 2023; 60:327-335. [PMID: 38222485 PMCID: PMC10787631 DOI: 10.2478/helm-2023-0037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2023] [Accepted: 10/20/2023] [Indexed: 01/16/2024] Open
Abstract
Rhesus macaques (Macaca mulatta) are distributed across Nepal in close association with humans and with a high probability of sharing of soil-transmitted intestinal helminth parasites. This study was carried out to determine the prevalence, richness and risk factors of gastrointestinal (GI) helminth parasites among rhesus macaques and humans in the Daunne Forest area, a community managed forest in the central mid-hills of Nepal. A total of 190 fecal samples, including 120 samples from rhesus macaques residing around the Daunne Devi Temple and in the surrounding forest, and 70 from local people, were microscopically examined by direct wet mount, floatation and sedimentation methods. Seasonal and age-sex based variations in helminth parasite prevalence were analyzed. Among the rhesus macaques, the total parasite prevalence was 39.2 %. Strongyloides sp. accounted for the highest prevalence (19.17 %) followed by Ascaris sp. (13.33 %), hookworm (10.83 %) and Trichuris sp. (4.17 %). Among the humans, Ascaris lumbricoides (11.3 %) was the only parasite detected. The Sorenson's coefficient of similarity of GI parasites between the macaques and local people at the generic level was 0.4. Mean parasite richness for the macaques was 1.21 ± 0.41 (SD) per infected sample. Parasite prevalence in the summer season (41.4 %) was higher than in the winter season (36 %). Adult macaques (41.67 %) had higher GI parasite prevalence than the young (30.77 %) and infants (27.27 %). Among the adult macaques, the prevalence rate was significantly higher (P=0.005) in females (52.46 %) than in males (22.86 %). Our results indicate that the temple rhesus macaques have a high prevalence of GI helminth parasites and could pose a potential zoonotic risk. As such, the need for routine monitoring and an effective management strategy is essential.
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Affiliation(s)
- S. Tandan
- Central Department of Zoology, Institute of Science and Technology, Tribhuvan University, Kathmandu44618, Nepal
| | - S. Kshetri
- Central Department of Zoology, Institute of Science and Technology, Tribhuvan University, Kathmandu44618, Nepal
| | - S. Paudel
- Central Department of Zoology, Institute of Science and Technology, Tribhuvan University, Kathmandu44618, Nepal
| | - P. Dhakal
- Central Department of Zoology, Institute of Science and Technology, Tribhuvan University, Kathmandu44618, Nepal
- College of Veterinary Medicine, Henan Agricultural University, Zhengzhou450046, China
| | - R. C. Kyes
- Departments of Psychology, Global Health, and Anthropology, Center for Global Field Study, and Washington National Primate Research Center, University of Washington, Seattle, WA 98195, USA
| | - L. Khanal
- Central Department of Zoology, Institute of Science and Technology, Tribhuvan University, Kathmandu44618, Nepal
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Beck KB, Sheldon BC, Firth JA. Social learning mechanisms shape transmission pathways through replicate local social networks of wild birds. eLife 2023; 12:85703. [PMID: 37128701 PMCID: PMC10154030 DOI: 10.7554/elife.85703] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Accepted: 04/05/2023] [Indexed: 05/03/2023] Open
Abstract
The emergence and spread of novel behaviours via social learning can lead to rapid population-level changes whereby the social connections between individuals shape information flow. However, behaviours can spread via different mechanisms and little is known about how information flow depends on the underlying learning rule individuals employ. Here, comparing four different learning mechanisms, we simulated behavioural spread on replicate empirical social networks of wild great tits and explored the relationship between individual sociality and the order of behavioural acquisition. Our results reveal that, for learning rules dependent on the sum and strength of social connections to informed individuals, social connectivity was related to the order of acquisition, with individuals with increased social connectivity and reduced social clustering adopting new behaviours faster. However, when behavioural adoption depends on the ratio of an individuals' social connections to informed versus uninformed individuals, social connectivity was not related to the order of acquisition. Finally, we show how specific learning mechanisms may limit behavioural spread within networks. These findings have important implications for understanding whether and how behaviours are likely to spread across social systems, the relationship between individuals' sociality and behavioural acquisition, and therefore for the costs and benefits of sociality.
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Affiliation(s)
- Kristina B Beck
- Edward Grey Institute of Field Ornithology, Department of Biology, University of Oxford, Oxford, United Kingdom
| | - Ben C Sheldon
- Edward Grey Institute of Field Ornithology, Department of Biology, University of Oxford, Oxford, United Kingdom
| | - Josh A Firth
- Edward Grey Institute of Field Ornithology, Department of Biology, University of Oxford, Oxford, United Kingdom
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6
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Torfs JRR, Stevens JMG, Verspeek J, Laméris DW, Guéry JP, Eens M, Staes N. Multi-group analysis of grooming network position in a highly social primate. PLoS One 2023; 18:e0284361. [PMID: 37099520 PMCID: PMC10132689 DOI: 10.1371/journal.pone.0284361] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2022] [Accepted: 03/29/2023] [Indexed: 04/27/2023] Open
Abstract
Individual variation in complex social behavioral traits, like primate grooming, can be influenced by the characteristics of the individual and those of its social group. To better grasp this complexity, social network analysis can be used to quantify direct and indirect grooming relationships. However, multi-group social network studies remain rare, despite their importance to disentangle individual from group-level trait effects on grooming strategies. We applied social network analysis to grooming data of 22 groups of zoo-housed bonobos and investigated the impact of three individual (sex, age, and rearing-history) and two group-level traits (group size and sex ratio) on five social network measures (out-strength, in-strength, disparity, affinity, and eigenvector centrality). Our results showed age-effects on all investigated measures: for females, all measures except for affinity showed quadratic relationships with age, while in males, the effects of age were more variable depending on the network measure. Bonobos with atypical rearing histories showed lower out-strength and eigenvector centrality, while in-strength was only impacted by rearing history in males. Group size showed a negative association with disparity and eigenvector centrality, while sex ratio did not influence any of the investigated measures. Standardization for group size did not impact the effects of sex and age, indicating the robustness of these findings. Our study provides comprehensive insights into the complexity of grooming behavior in zoo-housed bonobos, and underlines the importance of multi-group analyses for the generalizability of social network analysis results for species as a whole.
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Affiliation(s)
- Jonas R. R. Torfs
- Behavioural Ecology and Ecophysiology Group, Department of Biology, University of Antwerp, Antwerp, Belgium
- Centre for Research and Conservation, Royal Zoological Society of Antwerp, Antwerp, Belgium
| | - Jeroen M. G. Stevens
- Behavioural Ecology and Ecophysiology Group, Department of Biology, University of Antwerp, Antwerp, Belgium
- Centre for Research and Conservation, Royal Zoological Society of Antwerp, Antwerp, Belgium
- SALTO Agro- and Biotechnology, Odisee University College, Sint-Niklaas, Belgium
| | - Jonas Verspeek
- Behavioural Ecology and Ecophysiology Group, Department of Biology, University of Antwerp, Antwerp, Belgium
- Centre for Research and Conservation, Royal Zoological Society of Antwerp, Antwerp, Belgium
| | - Daan W. Laméris
- Behavioural Ecology and Ecophysiology Group, Department of Biology, University of Antwerp, Antwerp, Belgium
- Centre for Research and Conservation, Royal Zoological Society of Antwerp, Antwerp, Belgium
| | | | - Marcel Eens
- Behavioural Ecology and Ecophysiology Group, Department of Biology, University of Antwerp, Antwerp, Belgium
| | - Nicky Staes
- Behavioural Ecology and Ecophysiology Group, Department of Biology, University of Antwerp, Antwerp, Belgium
- Centre for Research and Conservation, Royal Zoological Society of Antwerp, Antwerp, Belgium
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7
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Wice EW, Saltz JB. Indirect genetic effects for social network structure in Drosophila melanogaster. Philos Trans R Soc Lond B Biol Sci 2023; 378:20220075. [PMID: 36802774 PMCID: PMC9939268 DOI: 10.1098/rstb.2022.0075] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Accepted: 12/16/2022] [Indexed: 02/21/2023] Open
Abstract
The position an individual holds in a social network is dependent on both its direct and indirect social interactions. Because social network position is dependent on the actions and interactions of conspecifics, it is likely that the genotypic composition of individuals within a social group impacts individuals' network positions. However, we know very little about whether social network positions have a genetic basis, and even less about how the genotypic makeup of a social group impacts network positions and structure. With ample evidence indicating that network positions influence various fitness metrics, studying how direct and indirect genetic effects shape network positions is crucial for furthering our understanding of how the social environment can respond to selection and evolve. Using replicate genotypes of Drosophila melanogaster fruit flies, we created social groups that varied in their genotypic makeup. Social groups were videoed, and networks were generated using motion-tracking software. We found that both an individual's own genotype and the genotypes of conspecifics in its social group affect its position within a social network. These findings provide an early example of how indirect genetic effects and social network theory can be linked, and shed new light on how quantitative genetic variation shapes the structure of social groups. This article is part of a discussion meeting issue 'Collective behaviour through time'.
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Affiliation(s)
- Eric Wesley Wice
- Department of Biosciences, Rice University, Houston, TX 77005, USA
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8
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Philippon J, Serrano-Martínez E, Poirotte C. Fecal avoidance and gastrointestinal parasitism in semi-free ranging woolly monkeys (Lagothrix lagotricha poeppigii). Behav Ecol Sociobiol 2023. [DOI: 10.1007/s00265-023-03317-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/05/2023]
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9
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Freymann E, Huffman MA, Muhumuza G, Gideon MM, Zuberbühler K, Hobaiter C. Friends in high places: Interspecific grooming between chimpanzees and primate prey species in Budongo Forest. Primates 2023; 64:325-337. [PMID: 36790568 PMCID: PMC9930027 DOI: 10.1007/s10329-023-01053-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2022] [Accepted: 01/26/2023] [Indexed: 02/16/2023]
Abstract
While cases of interspecies grooming have been reported in primates, no comprehensive cross-site review has been published about this behavior in great apes. Only a few recorded observations of interspecies grooming events between chimpanzees and other primate species have been reported in the wild, all of which have thus far been in Uganda. Here, we review all interspecies grooming events recorded for the Sonso community chimpanzees in Budongo Forest Reserve, Uganda, adding five new observations to the single, previously reported event from this community. A new case of interspecies play involving three juvenile male chimpanzees and a red-tailed monkey is also detailed. All events took place between 1993 and 2021. In all of the six interspecific grooming events from Budongo, the 'groomer' was a female chimpanzee between the ages of 4-6 years, and the 'recipient' was a member of the genus Cercopithecus. In five of these events, chimpanzee groomers played with the tail of their interspecific grooming partners, and except for one case, initiated the interaction. In three cases, chimpanzee groomers smelled their fingers after touching distinct parts of the receiver's body. While a single function of chimpanzee interspecies grooming remains difficult to determine from these results, our review outlines and assesses some hypotheses for the general function of this behavior, as well as some of the costs and benefits for both the chimpanzee groomers and their sympatric interspecific receivers. As allogrooming is a universal behavior in chimpanzees, investigating the ultimate and proximate drivers of chimpanzee interspecies grooming may reveal further functions of allogrooming in our closest living relatives, and help us to better understand how chimpanzees distinguish between affiliative and agonistic species and contexts.
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Affiliation(s)
- Elodie Freymann
- Primate Models for Behavioural Evolution Lab, Department of Anthropology and Museum Ethnography, Institute of Human Sciences, University of Oxford, Oxford, UK. .,Budongo Conservation Field Station, Masindi, Uganda.
| | - Michael A. Huffman
- Wildlife Research Center, Inuyama Campus, Kyoto University, Inuyama, Japan
| | | | | | - Klaus Zuberbühler
- Budongo Conservation Field Station, Masindi, Uganda ,Department of Comparative Cognition, Institute of Biology, University of Neuchâtel, Neuchâtel, Switzerland
| | - Catherine Hobaiter
- Wild Minds Lab, School of Psychology and Neuroscience, University of St Andrews, St Andrews, UK ,Budongo Conservation Field Station, Masindi, Uganda
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10
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Poirotte C, Charpentier MJE. Mother-to-daughter transmission of hygienic anti-parasite behaviour in mandrills. Proc Biol Sci 2023; 290:20222349. [PMID: 36750188 PMCID: PMC9904943 DOI: 10.1098/rspb.2022.2349] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2022] [Accepted: 01/13/2023] [Indexed: 02/09/2023] Open
Abstract
Social animals are particularly exposed to infectious diseases. Pathogen-driven selection pressures have thus favoured the evolution of behavioural adaptations to decrease transmission risk such as the avoidance of contagious individuals. Yet, such strategies deprive individuals of valuable social interactions, generating a cost-benefit trade-off between pathogen avoidance and social opportunities. Recent studies revealed that hosts differ in these behavioural defences, but the determinants driving such inter-individual variation remain understudied. Using 6 years of behavioural and parasite data on a large natural population of mandrills (Mandrillus sphinx), we showed that, when parasite prevalence was high in the population, females avoided grooming their conspecifics' peri-anal region (PAR), where contagious gastro-intestinal parasites accumulate. Females varied, however, in their propensity to avoid this risky body region: across years, some females consistently avoided grooming it, while others did not. Interestingly, hygienic females (i.e. those avoiding the PAR) were less parasitized than non-hygienic females. Finally, age, dominance rank and grooming frequency did not influence a female's hygiene, but both mother-daughter and maternal half-sisters exhibited similar hygienic levels, whereas paternal half-sisters and non-kin dyads did not, suggesting a social transmission of this behaviour. Our study emphasizes that the social inheritance of hygiene may structure behavioural resistance to pathogens in host populations with potential consequences on the dynamics of infectious diseases.
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Affiliation(s)
- Clémence Poirotte
- Behavioral Ecology and Sociobiology Unit, German Primate Center, Kellnerweg 4, 37077 Göttingen, Germany
| | - Marie J. E. Charpentier
- Institut des Sciences de l'Evolution de Montpellier (ISEM), UMR5554 - University of Montpellier/CNRS/IRD/EPHE, Place Eugène Bataillon, 34095 Montpellier Cedex 5, France
- Department for the Ecology of Animal Societies, Max Planck Institute of Animal Behavior, Bücklestrasse 5, Konstanz 78467, Germany
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11
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Egan ME, Pepin KM, Fischer JW, Hygnstrom SE, VerCauteren KC, Bastille‐Rousseau G. Social network analysis of white‐tailed deer scraping behavior: Implications for disease transmission. Ecosphere 2023. [DOI: 10.1002/ecs2.4434] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/22/2023] Open
Affiliation(s)
- Michael E. Egan
- Cooperative Wildlife Research Laboratory Southern Illinois University Carbondale Illinois USA
- School of Biological Sciences Southern Illinois University Carbondale Illinois USA
| | - Kim M. Pepin
- National Wildlife Research Center United States Department of Agriculture, Animal and Plant Health Inspection Services, Wildlife Service Fort Collins Colorado USA
| | - Justin W. Fischer
- National Wildlife Research Center United States Department of Agriculture, Animal and Plant Health Inspection Services, Wildlife Service Fort Collins Colorado USA
| | - Scott E. Hygnstrom
- Wisconsin Center for Wildlife College of Natural Resources, University of Wisconsin‐Stevens Point Stevens Point Wisconsin USA
| | - Kurt C. VerCauteren
- National Wildlife Research Center United States Department of Agriculture, Animal and Plant Health Inspection Services, Wildlife Service Fort Collins Colorado USA
| | - Guillaume Bastille‐Rousseau
- Cooperative Wildlife Research Laboratory Southern Illinois University Carbondale Illinois USA
- School of Biological Sciences Southern Illinois University Carbondale Illinois USA
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12
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Xu Z, MacIntosh AJ, Castellano-Navarro A, Macanás-Martínez E, Suzumura T, Duboscq J. Linking parasitism to network centrality and the impact of sampling bias in its interpretation. PeerJ 2022; 10:e14305. [PMID: 36420133 PMCID: PMC9677876 DOI: 10.7717/peerj.14305] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Accepted: 10/05/2022] [Indexed: 11/19/2022] Open
Abstract
Group living is beneficial for individuals, but also comes with costs. One such cost is the increased possibility of pathogen transmission because increased numbers or frequencies of social contacts are often associated with increased parasite abundance or diversity. The social structure of a group or population is paramount to patterns of infection and transmission. Yet, for various reasons, studies investigating the links between sociality and parasitism in animals, especially in primates, have only accounted for parts of the group (e.g., only adults), which is likely to impact the interpretation of results. Here, we investigated the relationship between social network centrality and an estimate of gastrointestinal helminth infection intensity in a whole group of Japanese macaques (Macaca fuscata). We then tested the impact of omitting parts of the group on this relationship. We aimed to test: (1) whether social network centrality -in terms of the number of partners (degree), frequency of interactions (strength), and level of social integration (eigenvector) -was linked to parasite infection intensity (estimated by eggs per gram of faeces, EPG); and, (2) to what extent excluding portions of individuals within the group might influence the observed relationship. We conducted social network analysis on data collected from one group of Japanese macaques over three months on Koshima Island, Japan. We then ran a series of knock-out simulations. General linear mixed models showed that, at the whole-group level, network centrality was positively associated with geohelminth infection intensity. However, in partial networks with only adult females, only juveniles, or random subsets of the group, the strength of this relationship - albeit still generally positive - lost statistical significance. Furthermore, knock-out simulations where individuals were removed but network metrics were retained from the original whole-group network showed that these changes are partly a power issue and partly an effect of sampling the incomplete network. Our study indicates that sampling bias can thus hamper our ability to detect real network effects involving social interaction and parasitism. In addition to supporting earlier results linking geohelminth infection to Japanese macaque social networks, this work introduces important methodological considerations for research into the dynamics of social transmission, with implications for infectious disease epidemiology, population management, and health interventions.
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Affiliation(s)
- Zhihong Xu
- Wildlife Research Center, Kyoto University, Kyoto, Kyoto, Japan,Primate Research Institute, Kyoto University, Inuyama, Aichi, Japan
| | - Andrew J.J. MacIntosh
- Wildlife Research Center, Kyoto University, Kyoto, Kyoto, Japan,Primate Research Institute, Kyoto University, Inuyama, Aichi, Japan
| | - Alba Castellano-Navarro
- Ethology and Animal Welfare Section, Universidad CEU Cardenal Herrera, Valencia, Valencia, Spain,Institute of Biology, Universität Leipzig, Leipzig, Saxony, Germany
| | - Emilio Macanás-Martínez
- Ethology and Animal Welfare Section, Universidad CEU Cardenal Herrera, Valencia, Valencia, Spain,Institute of Biology, Universität Leipzig, Leipzig, Saxony, Germany
| | | | - Julie Duboscq
- UMR7206 Eco-Anthropologie, CNRS-MNHN-Université de Paris, Paris, Île-de-France, France,Department of Behavioural Ecology, Johann-Friedrich-Blumenbach Institute for Zoology and Anthropology, University of Göttingen, Göttingen, Lower Saxony, Germany
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13
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Johnson KVA, Watson KK, Dunbar RIM, Burnet PWJ. Sociability in a non-captive macaque population is associated with beneficial gut bacteria. Front Microbiol 2022; 13:1032495. [PMID: 36439813 PMCID: PMC9691693 DOI: 10.3389/fmicb.2022.1032495] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Accepted: 10/03/2022] [Indexed: 11/12/2022] Open
Abstract
The relationship between social behaviour and the microbiome is known to be reciprocal. Research in wild animal populations, particularly in primate social groups, has revealed the role that social interactions play in microbial transmission, whilst studies in laboratory animals have demonstrated that the gut microbiome can affect multiple aspects of behaviour, including social behaviour. Here we explore behavioural variation in a non-captive animal population with respect to the abundance of specific bacterial genera. Social behaviour based on grooming interactions is assessed in a population of rhesus macaques (Macaca mulatta), and combined with gut microbiome data. We focus our analyses on microbiome genera previously linked to sociability and autistic behaviours in rodents and humans. We show in this macaque population that some of these genera are also related to an individual's propensity to engage in social interactions. Interestingly, we find that several of the genera positively related to sociability, such as Faecalibacterium, are well known for their beneficial effects on health and their anti-inflammatory properties. In contrast, the genus Streptococcus, which includes pathogenic species, is more abundant in less sociable macaques. Our results indicate that microorganisms whose abundance varies with individual social behaviour also have functional links to host immune status. Overall, these findings highlight the connections between social behaviour, microbiome composition, and health in an animal population.
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Affiliation(s)
- Katerina V.-A. Johnson
- Department of Psychiatry, University of Oxford, Oxford, United Kingdom,Department of Experimental Psychology, University of Oxford, Oxford, United Kingdom,*Correspondence: Katerina V.-A. Johnson,
| | - Karli K. Watson
- Institute of Cognitive Science, University of Colorado Boulder, Boulder, CO, United States
| | - Robin I. M. Dunbar
- Department of Experimental Psychology, University of Oxford, Oxford, United Kingdom
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14
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Brambilla A, von Hardenberg A, Canedoli C, Brivio F, Sueur C, Stanley CR. Long term analysis of social structure: evidence of age‐based consistent associations in male Alpine ibex. OIKOS 2022. [DOI: 10.1111/oik.09511] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Affiliation(s)
- Alice Brambilla
- Dept of Evolutionary Biology and Environmental Studies, Univ. of Zurich Zurich Switzerland
- Alpine Wildlife Research Center, Gran Paradiso National Park Torino Italy
| | - Achaz von Hardenberg
- Conservation Biology Research Group, Dept of Biological Sciences, Univ. of Chester Chester UK
| | - Claudia Canedoli
- Dept of Earth and Environmental Sciences, Univ. of Milano Bicocca Milano Italy
| | | | - Cédric Sueur
- Univ. de Strasbourg, CNRS, IPHC UMR 7178 Strasbourg France
- Inst. Universitaire de France, Saint‐Michel 103 Paris France
| | - Christina R. Stanley
- Conservation Biology Research Group, Dept of Biological Sciences, Univ. of Chester Chester UK
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15
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Mason B, Piel AK, Modrý D, Petrželková KJ, Stewart FA, Pafčo B. Association of human disturbance and gastrointestinal parasite infection of yellow baboons in western Tanzania. PLoS One 2022; 17:e0262481. [PMID: 35020760 PMCID: PMC8754341 DOI: 10.1371/journal.pone.0262481] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2021] [Accepted: 12/24/2021] [Indexed: 01/04/2023] Open
Abstract
Human disturbance is an ongoing threat to many wildlife species, manifesting as habitat destruction, resource overuse, or increased disease exposure, among others. With increasing human: non-human primate (NHP) encounters, NHPs are increasingly susceptible to human-introduced diseases, including those with parasitic origins. As such, epidemiology of parasitic disease is becoming an important consideration for NHP conservation strategies. To investigate the relationship between parasite infections and human disturbance we studied yellow baboons (Papio cynocephalus) living outside of national park boundaries in western Tanzania, collecting 135 fresh faecal samples from nine troops occupying areas with varying levels of human disturbance. We fixed all samples in 10% formalin and later evaluated parasite prevalence and abundance (of isotrichid ciliates and Strongylida). We identified seven protozoan and four helminth taxa. Taxa showed varied relationships with human disturbance, baboon troop size and host age. In four taxa, we found a positive association between prevalence and troop size. We also report a trend towards higher parasite prevalence of two taxa in less disturbed areas. To the contrary, high levels of human disturbance predicted increased abundance of isotrichid ciliates, although no relationship was found between disturbance and Strongylida abundance. Our results provide mixed evidence that human disturbance is associated with NHP parasite infections, highlighting the need to consider monitoring parasite infections when developing NHP conservation strategies.
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Affiliation(s)
- Bethan Mason
- Department of Botany and Zoology, Faculty of Science, Masaryk University, Brno, Czech Republic
- Institute of Vertebrate Biology, Czech Academy of Sciences, Brno, Czech Republic
| | - Alex K. Piel
- Department of Anthropology, University College London, London, United Kingdom
- Greater Mahale Ecosystem Research and Conservation (GMERC) Project, Busongola, Tanzania
| | - David Modrý
- Department of Botany and Zoology, Faculty of Science, Masaryk University, Brno, Czech Republic
- Institute of Parasitology, Biology Centre, Czech Academy of Sciences, České Budějovice, Czech Republic
- Department of Veterinary Sciences, Faculty of Agrobiology, Food and Natural Resources/CINeZ, Czech University of Life Sciences, Prague, Czech Republic
| | - Klára J. Petrželková
- Institute of Vertebrate Biology, Czech Academy of Sciences, Brno, Czech Republic
- Institute of Parasitology, Biology Centre, Czech Academy of Sciences, České Budějovice, Czech Republic
| | - Fiona A. Stewart
- Department of Anthropology, University College London, London, United Kingdom
- Greater Mahale Ecosystem Research and Conservation (GMERC) Project, Busongola, Tanzania
- School of Biological and Environmental Sciences, Liverpool John Moores University, Liverpool, United Kingdom
| | - Barbora Pafčo
- Institute of Vertebrate Biology, Czech Academy of Sciences, Brno, Czech Republic
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16
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Sah P, Otterstatter M, Leu ST, Leviyang S, Bansal S. Revealing mechanisms of infectious disease spread through empirical contact networks. PLoS Comput Biol 2021; 17:e1009604. [PMID: 34928936 PMCID: PMC8758098 DOI: 10.1371/journal.pcbi.1009604] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2020] [Revised: 01/13/2022] [Accepted: 10/31/2021] [Indexed: 11/28/2022] Open
Abstract
The spread of pathogens fundamentally depends on the underlying contacts between individuals. Modeling the dynamics of infectious disease spread through contact networks, however, can be challenging due to limited knowledge of how an infectious disease spreads and its transmission rate. We developed a novel statistical tool, INoDS (Identifying contact Networks of infectious Disease Spread) that estimates the transmission rate of an infectious disease outbreak, establishes epidemiological relevance of a contact network in explaining the observed pattern of infectious disease spread and enables model comparison between different contact network hypotheses. We show that our tool is robust to incomplete data and can be easily applied to datasets where infection timings of individuals are unknown. We tested the reliability of INoDS using simulation experiments of disease spread on a synthetic contact network and find that it is robust to incomplete data and is reliable under different settings of network dynamics and disease contagiousness compared with previous approaches. We demonstrate the applicability of our method in two host-pathogen systems: Crithidia bombi in bumblebee colonies and Salmonella in wild Australian sleepy lizard populations. INoDS thus provides a novel and reliable statistical tool for identifying transmission pathways of infectious disease spread. In addition, application of INoDS extends to understanding the spread of novel or emerging infectious disease, an alternative approach to laboratory transmission experiments, and overcoming common data-collection constraints. Network models are widely used to understand and predict infectious disease spread in human and animal populations. However, the choice of network model often relies on subjective expert knowledge or disease transmission experiments that are time-consuming and difficult to perform. We developed a novel tool, called INoDS (Identifying contact Networks of infectious Disease Spread), that uses robust statistical approach to establish relevance of a network model in explaining transmission pathways of an infectious disease outbreak. We used computer simulations and real-world dataset to test the accuracy of our tool and robustness to missing data. We found that INoDS is robust to common data-collection constraints, broadly applicable and accurate compared to current approaches. The tool that we have developed can therefore provide immediate epidemiological insights in the event of an epidemic outbreak, and can be used to improve targeted disease control.
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Affiliation(s)
- Pratha Sah
- Department of Biology, Georgetown University, Washington, District of Columbia, United States of America
| | - Michael Otterstatter
- British Columbia Centre for Disease Control, Vancouver, Canada
- School of Population and Public Health, University of British Columbia, Vancouver, Canada
| | - Stephan T. Leu
- School of Animal and Veterinary Sciences, The University of Adelaide, Roseworthy, Australia
| | - Sivan Leviyang
- Department of Mathematics & Statistics, Georgetown University, Washington, District of Columbia, United States of America
| | - Shweta Bansal
- Department of Biology, Georgetown University, Washington, District of Columbia, United States of America
- * E-mail:
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17
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Torfs JRR, Eens M, Laméris DW, Staes N. Respiratory Disease Risk of Zoo-Housed Bonobos Is Associated with Sex and Betweenness Centrality in the Proximity Network. Animals (Basel) 2021; 11:3597. [PMID: 34944372 PMCID: PMC8698162 DOI: 10.3390/ani11123597] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2021] [Revised: 12/16/2021] [Accepted: 12/17/2021] [Indexed: 12/24/2022] Open
Abstract
Infectious diseases can be considered a threat to animal welfare and are commonly spread through both direct and indirect social interactions with conspecifics. This is especially true for species with complex social lives, like primates. While several studies have investigated the impact of sociality on disease risk in primates, only a handful have focused on respiratory disease, despite it being a major cause of morbidity and mortality in both wild and captive populations and thus an important threat to primate welfare. Therefore, we examined the role of social-network position on the occurrence of respiratory disease symptoms during one winter season in a relatively large group of 20 zoo-housed bonobos with managed fission-fusion dynamics. We found that within the proximity network, symptoms were more likely to occur in individuals with higher betweenness centrality, which are individuals that form bridges between different parts of the network. Symptoms were also more likely to occur in males than in females, independent of their social-network position. Taken together, these results highlight a combined role of close proximity and sex in increased risk of attracting respiratory disease, two factors that can be taken into account for further welfare management of the species.
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Affiliation(s)
- Jonas R. R. Torfs
- Behavioral Ecology and Ecophysiology Group, Department of Biology, University of Antwerp, Universiteitsplein 1, 2610 Wilrijk, Belgium; (M.E.); (D.W.L.); (N.S.)
- Centre for Research and Conservation, Royal Zoological Society of Antwerp, Koningin Astridplein 26, 2018 Antwerp, Belgium
| | - Marcel Eens
- Behavioral Ecology and Ecophysiology Group, Department of Biology, University of Antwerp, Universiteitsplein 1, 2610 Wilrijk, Belgium; (M.E.); (D.W.L.); (N.S.)
| | - Daan W. Laméris
- Behavioral Ecology and Ecophysiology Group, Department of Biology, University of Antwerp, Universiteitsplein 1, 2610 Wilrijk, Belgium; (M.E.); (D.W.L.); (N.S.)
- Centre for Research and Conservation, Royal Zoological Society of Antwerp, Koningin Astridplein 26, 2018 Antwerp, Belgium
| | - Nicky Staes
- Behavioral Ecology and Ecophysiology Group, Department of Biology, University of Antwerp, Universiteitsplein 1, 2610 Wilrijk, Belgium; (M.E.); (D.W.L.); (N.S.)
- Centre for Research and Conservation, Royal Zoological Society of Antwerp, Koningin Astridplein 26, 2018 Antwerp, Belgium
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18
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Pavez-Fox MA, Negron-Del Valle JE, Thompson IJ, Walker CS, Bauman SE, Gonzalez O, Compo N, Ruiz-Lambides A, Martinez MI, Platt ML, Montague MJ, Higham JP, Snyder-Mackler N, Brent LJN. Sociality predicts individual variation in the immunity of free-ranging rhesus macaques. Physiol Behav 2021; 241:113560. [PMID: 34454245 PMCID: PMC8605072 DOI: 10.1016/j.physbeh.2021.113560] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Revised: 08/13/2021] [Accepted: 08/16/2021] [Indexed: 11/18/2022]
Abstract
Social integration and social status can substantially affect an individual’s health and survival. One route through which this occurs is by altering immune function, which can be highly sensitive to changes in the social environment. However, we currently have limited understanding of how sociality influences markers of immunity in naturalistic populations where social dynamics can be fully realized. To address this gap, we asked if social integration and social status in free-ranging rhesus macaques (Macaca mulatta) predict anatomical and physiological markers of immunity. We used data on agonistic interactions to determine social status, and social network analysis of grooming interactions to generate measures of individual variation in social integration. As measures of immunity, we included the size of two of the major organs involved in the immune response, the spleen and liver, and counts of three types of blood cells (red blood cells, platelets, and white blood cells). Controlling for body mass and age, we found that neither social status nor social integration predicted the size of anatomical markers of immunity. However, individuals that were more socially connected, i.e., with more grooming partners, had lower numbers of white blood cells than their socially isolated counterparts, indicating lower levels of inflammation with increasing levels of integration. These results build upon and extend our knowledge of the relationship between sociality and the immune system in humans and captive animals to free-ranging primates, demonstrating generalizability of the beneficial role of social integration on health.
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Affiliation(s)
- Melissa A Pavez-Fox
- Centre for Research in Animal Behaviour, University of Exeter, United Kingdom.
| | | | - Indya J Thompson
- Department of Molecular Biomedical Sciences College of Veterinary Medicine, North Carolina State University, NC, United States
| | - Christopher S Walker
- Department of Molecular Biomedical Sciences College of Veterinary Medicine, North Carolina State University, NC, United States
| | - Samuel E Bauman
- Caribbean Primate Research Center, University of Puerto Rico, Puerto Rico
| | - Olga Gonzalez
- Texas Biomedical Research Institute, TX, United States
| | | | | | - Melween I Martinez
- Caribbean Primate Research Center, University of Puerto Rico, Puerto Rico
| | - Michael L Platt
- Department of Neuroscience, University of Pennsylvania, PA, United States; Department of Anthropology, University of Pennsylvania, PA, United States; Department of Psychology, University of Pennsylvania, PA, United States; Department of Marketing, University of Pennsylvania , PA, United States
| | - Michael J Montague
- Department of Neuroscience, University of Pennsylvania, PA, United States
| | - James P Higham
- Department of Anthropology, New York University, NY, United States
| | - Noah Snyder-Mackler
- Center for Evolution and Medicine, Arizona State University, AZ, United States; School of Life Sciences, Arizona State University, AZ, United States
| | - Lauren J N Brent
- Centre for Research in Animal Behaviour, University of Exeter, United Kingdom
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19
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Romano V, Sueur C, MacIntosh AJJ. The tradeoff between information and pathogen transmission in animal societies. OIKOS 2021. [DOI: 10.1111/oik.08290] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Valéria Romano
- Univ. de Strasbourg, CNRS, IPHC UMR 7178 Strasbourg France
- Primate Research Inst., Kyoto Univ. Inuyama Japan
| | - Cédric Sueur
- Univ. de Strasbourg, CNRS, IPHC UMR 7178 Strasbourg France
- Inst. Univ. de France Paris France
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20
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Poulin R, Filion A. Evolution of social behaviour in an infectious world: comparative analysis of social network structure versus parasite richness. Behav Ecol Sociobiol 2021. [DOI: 10.1007/s00265-021-03039-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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21
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Abstract
Understanding variation in host-associated microbial communities is important given the relevance of microbiomes to host physiology and health. Using 560 fecal samples collected from wild chimpanzees (Pan troglodytes) across their range, we assessed how geography, genetics, climate, vegetation, and diet relate to gut microbial community structure (prokaryotes, eukaryotic parasites) at multiple spatial scales. We observed a high degree of regional specificity in the microbiome composition, which was associated with host genetics, available plant foods, and potentially with cultural differences in tool use, which affect diet. Genetic differences drove community composition at large scales, while vegetation and potentially tool use drove within-region differences, likely due to their influence on diet. Unlike industrialized human populations in the United States, where regional differences in the gut microbiome are undetectable, chimpanzee gut microbiomes are far more variable across space, suggesting that technological developments have decoupled humans from their local environments, obscuring regional differences that could have been important during human evolution. IMPORTANCE Gut microbial communities are drivers of primate physiology and health, but the factors that influence the gut microbiome in wild primate populations remain largely undetermined. We report data from a continent-wide survey of wild chimpanzee gut microbiota and highlight the effects of genetics, vegetation, and potentially even tool use at different spatial scales on the chimpanzee gut microbiome, including bacteria, archaea, and eukaryotic parasites. Microbial community dissimilarity was strongly correlated with chimpanzee population genetic dissimilarity, and vegetation composition and consumption of algae, honey, nuts, and termites were potentially associated with additional divergence in microbial communities between sampling sites. Our results suggest that host genetics, geography, and climate play a far stronger role in structuring the gut microbiome in chimpanzees than in humans.
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22
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Wasserman MD, Wing B, Bickford N, Hobbs K, Dijkstra P, Carr J. Stress responses across the scales of life: Towards a universal theory of biological stress. Integr Comp Biol 2021; 61:2109-2118. [PMID: 34057460 DOI: 10.1093/icb/icab113] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Abstract
Although biological systems are more complex and can actively respond to their environment, an effective entry point to the development of a universal theory of biological stress are the physical concepts of stress and strain. If you apply stress to the end of a beam of steel, strain will accumulate within that steel beam. If the stress is weak, that strain will disappear when the force is removed and the beam will return to its original state of form and functionality. If the stress is more severe, the strain becomes permanent and the beam will be deformed, potentially losing some degree of functionality. In extremely stressful situations, the beam will break and lose most or all of its original functional capabilities. Although this stress-strain theory applies to the abiotic, stress and strain are also rules of life and directly relate to the form and function of living organisms. The main difference is that life can react and adjust to stress and strain to maintain homeostasis within a range of limits. Here, we summarize the rules of stress and strain in living systems ranging from microbes to multicellular organisms to ecosystems with the goal of identifying common features that may underlie a universal biological theory of stress. We then propose to establish a range of experimental, observational, and analytical approaches to study stress across scales, including synthetic microbial communities that mimic many of the essential characteristics of living systems, thereby enabling a universal theory of biological stress to be experimentally validated without the constraints of timescales, ethics, or cost found when studying other species or scales of life. Although the range of terminology, theory, and methodology used to study stress and strain across the scales of life presents a formidable challenge to creating a universal theory of biological stress, working towards such a theory that informs our understanding of the simultaneous and interconnected unicellular, multicellular, organismal, and ecosystem stress responses is critical as it will improve our ability to predict how living systems respond to change, thus informing solutions to current and future environmental and human health challenges.
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Affiliation(s)
| | - Boswell Wing
- University of Colorado Boulder, Geological Sciences
| | | | - Kimberly Hobbs
- Alabama A&M University, Biological and Environmental Sciences
| | | | - Jim Carr
- Texas Tech University, Biological Sciences
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23
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Deere JR, Schaber KL, Foerster S, Gilby IC, Feldblum JT, VanderWaal K, Wolf TM, Travis DA, Raphael J, Lipende I, Mjungu D, Pusey AE, Lonsdorf EV, Gillespie TR. Gregariousness is associated with parasite species richness in a community of wild chimpanzees. Behav Ecol Sociobiol 2021; 75:87. [PMID: 34456452 PMCID: PMC8386636 DOI: 10.1007/s00265-021-03030-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2020] [Revised: 04/19/2021] [Accepted: 04/22/2021] [Indexed: 11/25/2022]
Abstract
Increased risk of pathogen transmission through proximity and contact is a well-documented cost of sociality. Affiliative social contact, however, is an integral part of primate group life and can benefit health. Despite its importance to the evolution and maintenance of sociality, the tradeoff between costs and benefits of social contact for group-living primate species remains poorly understood. To improve our understanding of this interplay, we used social network analysis to investigate whether contact via association in the same space and/or physical contact measured through grooming were associated with helminth parasite species richness in a community of wild chimpanzees (Pan troglodytes schweinfurthii). We identified parasite taxa in 381 fecal samples from 36 individuals from the Kasekela community of chimpanzees in Gombe National Park, Tanzania, from November 1, 2006 - October 31, 2012. Over the study period, eight environmentally transmitted helminth taxa were identified. We quantified three network metrics for association and grooming contact, including degree strength, betweenness, and closeness. Our findings suggest that more gregarious individuals - those who spent more time with more individuals in the same space - had higher parasite richness, while the connections in the grooming network were not related to parasite richness. The expected parasite richness in individuals increased by 1.13 taxa (CI: 1.04, 1.22; p = 0.02) per one standard deviation increase in degree strength of association contact. The results of this study add to the understanding of the role that different types of social contact plays in the parasite richness of group-living social primates.
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Affiliation(s)
- Jessica R. Deere
- Department of Veterinary Population Medicine, College of Veterinary Medicine, University of Minnesota, St. Paul, MN USA
| | - Kathryn L. Schaber
- Department of Environmental Sciences and Program in Population Biology, Ecology, and Evolutionary Biology, Emory University, Atlanta, GA USA
- Department of Environmental Health, Rollins School of Public Health, Emory University, Atlanta, GA USA
| | - Steffen Foerster
- Department of Evolutionary Anthropology, Duke University, Durham, NC USA
| | - Ian C. Gilby
- School of Human Evolution and Social Change, and Institute of Human Origins, Arizona State University, Tempe, AZ USA
| | - Joseph T. Feldblum
- Department of Anthropology, and Society of Fellows, University of Michigan, Ann Arbor, MI US
| | - Kimberly VanderWaal
- Department of Veterinary Population Medicine, College of Veterinary Medicine, University of Minnesota, St. Paul, MN USA
| | - Tiffany M. Wolf
- Department of Veterinary Population Medicine, College of Veterinary Medicine, University of Minnesota, St. Paul, MN USA
| | - Dominic A. Travis
- Department of Veterinary Population Medicine, College of Veterinary Medicine, University of Minnesota, St. Paul, MN USA
| | - Jane Raphael
- Tanzanian National Park Authority, Arusha, Tanzania
| | - Iddi Lipende
- Tanzania Wildlife Research Institute, Arusha, Tanzania
| | - Deus Mjungu
- Gombe Stream Research Center, The Jane Goodall Institute, Kigoma, Tanzania
| | - Anne E. Pusey
- Department of Evolutionary Anthropology, Duke University, Durham, NC USA
| | | | - Thomas R. Gillespie
- Department of Environmental Sciences and Program in Population Biology, Ecology, and Evolutionary Biology, Emory University, Atlanta, GA USA
- Department of Environmental Health, Rollins School of Public Health, Emory University, Atlanta, GA USA
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24
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Maurin M, Fenollar F, Mediannikov O, Davoust B, Devaux C, Raoult D. Current Status of Putative Animal Sources of SARS-CoV-2 Infection in Humans: Wildlife, Domestic Animals and Pets. Microorganisms 2021; 9:868. [PMID: 33920724 PMCID: PMC8072559 DOI: 10.3390/microorganisms9040868] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2021] [Revised: 04/11/2021] [Accepted: 04/13/2021] [Indexed: 01/08/2023] Open
Abstract
SARS-CoV-2 is currently considered to have emerged from a bat coronavirus reservoir. However, the real natural cycle of this virus remains to be elucidated. Moreover, the COVID-19 pandemic has led to novel opportunities for SARS-CoV-2 transmission between humans and susceptible animal species. In silico and in vitro evaluation of the interactions between the SARS-CoV-2 spike protein and eucaryotic angiotensin-converting enzyme 2 (ACE2) receptor have tentatively predicted susceptibility to SARS-CoV-2 infection of several animal species. Although useful, these data do not always correlate with in vivo data obtained in experimental models or during natural infections. Other host biological properties may intervene such as the body temperature, level of receptor expression, co-receptor, restriction factors, and genetic background. The spread of SARS-CoV-2 also depends on the extent and duration of viral shedding in the infected host as well as population density and behaviour (group living and grooming). Overall, current data indicate that the most at-risk interactions between humans and animals for COVID-19 infection are those involving certain mustelids (such as minks and ferrets), rodents (such as hamsters), lagomorphs (especially rabbits), and felines (including cats). Therefore, special attention should be paid to the risk of SARS-CoV-2 infection associated with pets.
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Affiliation(s)
- Max Maurin
- University Grenoble Alpes, CNRS, Grenoble INP, CHU Grenoble Alpes, TIMC-IMAG, 38000 Grenoble, France;
| | - Florence Fenollar
- IHU-Méditerranée Infection, 13005 Marseille, France; (F.F.); (O.M.); (B.D.); (C.D.)
- IRD, AP-HM, SSA, VITROME, Aix Marseille University, 13005 Marseille, France
| | - Oleg Mediannikov
- IHU-Méditerranée Infection, 13005 Marseille, France; (F.F.); (O.M.); (B.D.); (C.D.)
- IRD, AP-HM, MEPHI, Aix Marseille University, 13005 Marseille, France
| | - Bernard Davoust
- IHU-Méditerranée Infection, 13005 Marseille, France; (F.F.); (O.M.); (B.D.); (C.D.)
- IRD, AP-HM, MEPHI, Aix Marseille University, 13005 Marseille, France
| | - Christian Devaux
- IHU-Méditerranée Infection, 13005 Marseille, France; (F.F.); (O.M.); (B.D.); (C.D.)
- IRD, AP-HM, MEPHI, Aix Marseille University, 13005 Marseille, France
- Centre National de la Recherche Scientifique, 13005 Marseille, France
| | - Didier Raoult
- IHU-Méditerranée Infection, 13005 Marseille, France; (F.F.); (O.M.); (B.D.); (C.D.)
- IRD, AP-HM, MEPHI, Aix Marseille University, 13005 Marseille, France
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25
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Runghen R, Poulin R, Monlleó-Borrull C, Llopis-Belenguer C. Network Analysis: Ten Years Shining Light on Host-Parasite Interactions. Trends Parasitol 2021; 37:445-455. [PMID: 33558197 DOI: 10.1016/j.pt.2021.01.005] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2020] [Revised: 01/15/2021] [Accepted: 01/16/2021] [Indexed: 12/24/2022]
Abstract
Biological interactions are key drivers of ecological and evolutionary processes. The complexity of such interactions hinders our understanding of ecological systems and our ability to make effective predictions in changing environments. However, network analysis allows us to better tackle the complexity of ecosystems because it extracts the properties of an ecological system according to the number and distribution of links among interacting entities. The number of studies using network analysis to solve ecological and evolutionary questions in parasitology has increased over the past decade. Here, we synthesise the contribution of network analysis toward disentangling host-parasite processes. Furthermore, we identify current trends in mainstream ecology and novel applications of network analysis that present opportunities for research on host-parasite interactions.
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Affiliation(s)
- Rogini Runghen
- Centre for Integrative Ecology, School of Biological Sciences, University of Canterbury, Private Bag 4800, 8140 Christchurch, New Zealand
| | - Robert Poulin
- Department of Zoology, University of Otago, 340 Great King Street, 9054 Dunedin, New Zealand
| | - Clara Monlleó-Borrull
- Cavanilles Institute of Biodiversity and Evolutionary Biology, University of Valencia, PO Box 22085, ES-46071, Valencia, Spain
| | - Cristina Llopis-Belenguer
- Cavanilles Institute of Biodiversity and Evolutionary Biology, University of Valencia, PO Box 22085, ES-46071, Valencia, Spain.
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Parasitism and host social behaviour: a meta-analysis of insights derived from social network analysis. Anim Behav 2021. [DOI: 10.1016/j.anbehav.2020.11.010] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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27
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Albery GF, Newman C, Ross JB, MacDonald DW, Bansal S, Buesching C. Negative density-dependent parasitism in a group-living carnivore. Proc Biol Sci 2020; 287:20202655. [PMID: 33323092 PMCID: PMC7779509 DOI: 10.1098/rspb.2020.2655] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2020] [Accepted: 11/23/2020] [Indexed: 12/12/2022] Open
Abstract
Animals living at high population densities commonly experience greater exposure to disease, leading to increased parasite burdens. However, social animals can benefit immunologically and hygienically from cooperation, and individuals may alter their socio-spatial behaviour in response to infection, both of which could counteract density-related increases in exposure. Consequently, the costs and benefits of sociality for disease are often uncertain. Here, we use a long-term study of a wild European badger population (Meles meles) to investigate how within-population variation in host density determines infection with multiple parasites. Four out of five parasite taxa exhibited consistent spatial hotspots of infection, which peaked among badgers living in areas of low local population density. Combined movement, survival, spatial and social network analyses revealed that parasite avoidance was the likely cause of this negative density dependence, with possible roles for localized mortality, encounter-dilution effects, and micronutrient-enhanced immunity. These findings demonstrate that animals can organize their societies in space to minimize parasite infection, with important implications for badger behavioural ecology and for the control of badger-associated diseases.
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Affiliation(s)
| | - Chris Newman
- Wildlife Conservation Research Unit, The Recanati-Kaplan Centre, Department of Zoology, University of Oxford, Oxford, UK
| | - Julius Bright Ross
- Wildlife Conservation Research Unit, The Recanati-Kaplan Centre, Department of Zoology, University of Oxford, Oxford, UK
| | - David W. MacDonald
- Wildlife Conservation Research Unit, The Recanati-Kaplan Centre, Department of Zoology, University of Oxford, Oxford, UK
| | - Shweta Bansal
- Department of Biology, Georgetown University, Washington, DC, USA
| | - Christina Buesching
- Wildlife Conservation Research Unit, The Recanati-Kaplan Centre, Department of Zoology, University of Oxford, Oxford, UK
- Irving K. Barber Faculty of Sciences, Okanagan Department of Biology, The University of British Columbia, Kelowna, British Columbia, Canada
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Sandel AA, Rushmore J, Negrey JD, Mitani JC, Lyons DM, Caillaud D. Social Network Predicts Exposure to Respiratory Infection in a Wild Chimpanzee Group. ECOHEALTH 2020; 17:437-448. [PMID: 33404931 PMCID: PMC7786864 DOI: 10.1007/s10393-020-01507-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/15/2019] [Revised: 10/20/2020] [Accepted: 10/20/2020] [Indexed: 06/12/2023]
Abstract
Respiratory pathogens are expected to spread through social contacts, but outbreaks often occur quickly and unpredictably, making it challenging to simultaneously record social contact and disease incidence data, especially in wildlife. Thus, the role of social contacts in the spread of infectious disease is often treated as an assumption in disease simulation studies, and few studies have empirically demonstrated how pathogens spread through social networks. In July-August 2015, an outbreak of respiratory disease was observed in a wild chimpanzee community in Kibale National Park, Uganda, during an ongoing behavioral study of male chimpanzees, offering a rare opportunity to evaluate how social behavior affects individual exposure to socially transmissible diseases. From May to August 2015, we identified adult and adolescent male chimpanzees displaying coughs and rhinorrhea and recorded 5-m proximity data on males (N = 40). Using the network k-test, we found significant relationships between male network connectivity and the distribution of cases within the network, supporting the importance of short-distance contacts for the spread of the respiratory outbreak. Additionally, chimpanzees central to the network were more likely to display clinical signs than those with fewer connections. Although our analyses were limited to male chimpanzees, these findings underscore the value of social connectivity data in predicting disease outcomes and elucidate a potential evolutionary cost of being social.
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Affiliation(s)
- Aaron A Sandel
- Department of Anthropology, University of Texas at Austin, 2201 Speedway Stop C3200, Austin, TX, 78712, USA.
| | - Julie Rushmore
- One Health Institute, School of Veterinary Medicine, University of California, Davis, CA, USA
- Epicenter for Disease Dynamics, School of Veterinary Medicine, University of California, Davis, CA, USA
| | - Jacob D Negrey
- Department of Pathobiological Sciences, University of Wisconsin, Madison, WI, USA
| | - John C Mitani
- Department of Anthropology, University of Michigan, Ann Arbor, MI, USA
| | - Daniel M Lyons
- Department of Ecology and Evolutionary Biology, University of Michigan, Ann Arbor, MI, USA
| | - Damien Caillaud
- Department of Anthropology, University of California, Davis, CA, USA
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29
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30
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Albery GF, Kirkpatrick L, Firth JA, Bansal S. Unifying spatial and social network analysis in disease ecology. J Anim Ecol 2020; 90:45-61. [DOI: 10.1111/1365-2656.13356] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2020] [Accepted: 08/24/2020] [Indexed: 01/18/2023]
Affiliation(s)
| | | | - Josh A. Firth
- Department of Zoology Edward Grey Institute University of Oxford Oxford UK
- Merton College Oxford University Oxford UK
| | - Shweta Bansal
- Department of Biology Georgetown University Washington DC USA
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31
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Molecular identification of Leishmania in free-ranging black and gold howler monkeys (Alouatta caraya) in northeastern Argentina. Acta Trop 2020; 210:105534. [PMID: 32450135 DOI: 10.1016/j.actatropica.2020.105534] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2020] [Revised: 04/24/2020] [Accepted: 05/08/2020] [Indexed: 11/20/2022]
Abstract
Parasitological surveys of non-human primates provides an important opportunity to better understand the epidemiology, transmission dynamics and emergence risk of anthropozoonoses such as leishmaniasis, which affect human populations in several regions accross South America. Our study area, in northeastern Argentina, can be considered a southern marginal region for the presence of leishmaniases and includes the habitat of black and gold howler monkeys, Alouatta caraya. To evaluate if A. caraya serve as potential hosts in the Leishmania cycle, we used molecular methods to examine infection by Leishmania spp. in 109 howler monkeys of different ages captured between July and August 2010. External ear tissue samples were subjected to PCR amplification for the Leishmania ribosomal internal transcribed spacer (ITS-1) and a RFLP assay with the Hae III restriction enzyme, and finally confirmed by sequencing. Nine howler monkeys (8.3%) were infected with Le. braziliensis (2.8%), Le. amazonensis (2.8%) and/or Le. infantum (3.7%). The results also suggest a case of co-infection between Le. braziliensis and Le. amazonensis. Further, we report the first observation of Le. amazonensis in the northeastern region of Argentina. The detection of Leishmania spp. in free-ranging howler monkeys gives rise to questions about the actual prevalence of the parasite in the wild, as well as if the number of infected wild monkeys detected may present a risk of leishmaniasis emergence in surronding human populations. Anyway, the presence of Leishmania spp. in A. caraya suggests the possible importance of these monkeys in the sylvatic and periurban transmission.
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32
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Boeving ER, Rodrigues MA, Nelson EL. Network analysis as a tool to understand social development in spider monkeys. Am J Primatol 2020; 82:e23182. [PMID: 32794244 DOI: 10.1002/ajp.23182] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2019] [Revised: 05/19/2020] [Accepted: 06/25/2020] [Indexed: 12/26/2022]
Abstract
The emerging field of network science has demonstrated that an individual's connectedness within their social network has cascading effects to other dimensions of life. Like humans, spider monkeys live in societies with high fission-fusion dynamics, and are remarkably social. Social network analysis (SNA) is a powerful tool for quantifying connections that may vary as a function of initiating or receiving social behaviors, which has been described as shifting social roles. In primatology, the SNA literature is dominated by work in catarrhines, and has yet to be applied to the study of development in a platyrrhine model. Here, SNA was utilized in combination with R-Index social role calculation to characterize social interaction patterns in juvenile and adult Colombian spider monkeys (Ateles fusciceps rufiventris). Connections were examined across five behaviors: embrace, face-embrace, grooming, agonism, and tail-wrapping from 186 hr of observation and four network metrics. Mann-Whitney U tests were utilized to determine differences between adult and juvenile social network patterns for each behavior. Face-embrace emerged as the behavior with different network patterns for adults and juveniles for every network metric. With regard to social role, juveniles were receivers, not initiators, for embrace, face-embrace, and grooming (ps < .05). Network and social role differences are discussed in light of social development and aspects of the different behaviors.
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Affiliation(s)
- Emily R Boeving
- Department of Psychology, Florida International University, Miami, Florida
| | - Michelle A Rodrigues
- Beckman Institute for Science and Technology, University of Illinois, Urbana-Champaign, Illinois.,Department of Social and Cultural Sciences, Marquette University, Milwaukee, Wisconsin
| | - Eliza L Nelson
- Department of Psychology, Florida International University, Miami, Florida
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33
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Tkaczynski PJ, Mielke A, Samuni L, Preis A, Wittig RM, Crockford C. Long-term repeatability in social behaviour suggests stable social phenotypes in wild chimpanzees. ROYAL SOCIETY OPEN SCIENCE 2020; 7:200454. [PMID: 32968512 PMCID: PMC7481694 DOI: 10.1098/rsos.200454] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2020] [Accepted: 07/09/2020] [Indexed: 05/07/2023]
Abstract
Consistent individual differences in social phenotypes have been observed in many animal species. Changes in demographics, dominance hierarchies or ecological factors, such as food availability or disease prevalence, are expected to influence decision-making processes regarding social interactions. Therefore, it should be expected that individuals show flexibility rather than stability in social behaviour over time to maximize the fitness benefits of social living. Understanding the processes that create and maintain social phenotypes requires data encompassing a range of socioecological settings and variation in intrinsic state or life-history stage or strategy. Using observational data spanning up to 19 years for some individuals, we demonstrate that multiple types of social behaviour are repeatable over the long term in wild chimpanzees, a long-lived species with complex fission-fusion societies. We controlled for temporal, ecological and demographic changes, limiting pseudo-repeatability. We conclude that chimpanzees living in natural ecological settings have relatively stable long-term social phenotypes over years that may be independent of life-history or reproductive strategies. Our results add to the growing body of the literature suggesting consistent individual differences in social tendencies are more likely the rule rather than the exception in group-living animals.
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Affiliation(s)
- Patrick J. Tkaczynski
- Department of Human Behaviour, Ecology and Culture, Max Planck Institute for Evolutionary Anthropology, Leipzig, Germany
| | - Alexander Mielke
- School of Anthropology and Museum Ethnography, University of Oxford, Oxford, UK
| | - Liran Samuni
- Department of Human Behaviour, Ecology and Culture, Max Planck Institute for Evolutionary Anthropology, Leipzig, Germany
- Department of Human Evolutionary Biology, Harvard University, Cambridge, MA, USA
- Taï Chimpanzee Project, Centre Suisse de Recherches Scientifiques, Abidjan, Côte d'Ivoire
| | - Anna Preis
- Wild Chimpanzee Foundation, Conakry, Guinea
| | - Roman M. Wittig
- Department of Human Behaviour, Ecology and Culture, Max Planck Institute for Evolutionary Anthropology, Leipzig, Germany
- Taï Chimpanzee Project, Centre Suisse de Recherches Scientifiques, Abidjan, Côte d'Ivoire
| | - Catherine Crockford
- Department of Human Behaviour, Ecology and Culture, Max Planck Institute for Evolutionary Anthropology, Leipzig, Germany
- Taï Chimpanzee Project, Centre Suisse de Recherches Scientifiques, Abidjan, Côte d'Ivoire
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34
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Wilson MW, Ridlon AD, Gaynor KM, Gaines SD, Stier AC, Halpern BS. Ecological impacts of human-induced animal behaviour change. Ecol Lett 2020; 23:1522-1536. [PMID: 32705769 DOI: 10.1111/ele.13571] [Citation(s) in RCA: 65] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Accepted: 06/02/2020] [Indexed: 12/20/2022]
Abstract
A growing body of literature has documented myriad effects of human activities on animal behaviour, yet the ultimate ecological consequences of these behavioural shifts remain largely uninvestigated. While it is understood that, in the absence of humans, variation in animal behaviour can have cascading effects on species interactions, community structure and ecosystem function, we know little about whether the type or magnitude of human-induced behavioural shifts translate into detectable ecological change. Here we synthesise empirical literature and theory to create a novel framework for examining the range of behaviourally mediated pathways through which human activities may affect different ecosystem functions. We highlight the few empirical studies that show the potential realisation of some of these pathways, but also identify numerous factors that can dampen or prevent ultimate ecosystem consequences. Without a deeper understanding of these pathways, we risk wasting valuable resources on mitigating behavioural effects with little ecological relevance, or conversely mismanaging situations in which behavioural effects do drive ecosystem change. The framework presented here can be used to anticipate the nature and likelihood of ecological outcomes and prioritise management among widespread human-induced behavioural shifts, while also suggesting key priorities for future research linking humans, animal behaviour and ecology.
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Affiliation(s)
- Margaret W Wilson
- Bren School of Environmental Science & Management, University of California, Santa Barbara, CA, 93106, USA
| | - April D Ridlon
- National Center for Ecological Analysis and Synthesis, University of California, Santa Barbara, CA, 93101, USA
| | - Kaitlyn M Gaynor
- National Center for Ecological Analysis and Synthesis, University of California, Santa Barbara, CA, 93101, USA
| | - Steven D Gaines
- Bren School of Environmental Science & Management, University of California, Santa Barbara, CA, 93106, USA
| | - Adrian C Stier
- Department of Ecology, Evolution, and Marine Biology, University of California Santa Barbara, Santa Barbara, CA, 93106, USA
| | - Benjamin S Halpern
- Bren School of Environmental Science & Management, University of California, Santa Barbara, CA, 93106, USA.,National Center for Ecological Analysis and Synthesis, University of California, Santa Barbara, CA, 93101, USA
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35
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Kane J, Smith RL. Bertiella sp. (Meyner, 1895) infection of Alouatta caraya (Humboldt, 1812) in urban and natural environments in Ñeembucú, southwest Paraguay. Am J Primatol 2020; 82:e23166. [PMID: 32596875 DOI: 10.1002/ajp.23166] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2019] [Revised: 05/29/2020] [Accepted: 06/07/2020] [Indexed: 11/05/2022]
Abstract
Bertiella sp., a cestode known to infect a variety of hosts, including nonhuman primates and humans, was identified in Paraguay as early as 1895, but no systematic analysis of wild primates' gastrointestinal parasites has ever been carried out in Paraguay. Increased urbanization in southwest Paraguay has pushed the Paraguayan howler monkey (Alouatta caraya) into anthropogenic habitats, particularly in the city of Pilar (Ñeembucú department), giving rise to greater potential for zoonotic transmission between wild primates and humans. From July to December 2018, fecal samples were noninvasively collected from 48 howlers inside Pilar (urban environment), the Pilar Military Base (intermediate environment), and a ranch 27 km outside Pilar in the humid Chaco (natural environment) and analyzed for Bertiella eggs and proglottids using macro-analysis and formol-ether sedimentation. Howlers living in the urban environment had the highest rates of Bertiella infection (50% prevalence), with considerably lower infection rates in the intermediate environment (6.25% prevalence) and natural habitats (0% prevalence). A χ2 goodness-of-fit test indicated a significant difference between the three habitat types (p = .007, χ2 = 10.005, df = 2). While the habitat seems to impact the frequency of infection, Bertiella was not observed to select for other factors such as age or sex of the primate host. Here we identified a significant increase in the frequency of Bertiella infection in an urban environment, which can then be further transmitted to new hosts with more direct primate contact. Bertiella infection has already been documented in humans in Paraguay, all of which were associated with close primate contact. As howlers move into more urban habitats due to urbanization and habitat fragmentation, Bertiella could be introduced into this new ecosystem and has the potential to cause further infections in humans.
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Affiliation(s)
- John Kane
- Fundación Para La Tierra, Centro IDEAL, Pilar, Paraguay.,Department of Bacteriology, University of Wisconsin-Madison, Madison, Wisconsin
| | - Rebecca L Smith
- Fundación Para La Tierra, Centro IDEAL, Pilar, Paraguay.,School of Biological Sciences, University of Aberdeen, Aberdeen, Scotland
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36
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Lynsdale CL, Mon NO, Franco Dos Santos DJ, Aung HH, Nyein UK, Htut W, Childs D, Lummaa V. Demographic and reproductive associations with nematode infection in a long-lived mammal. Sci Rep 2020; 10:9214. [PMID: 32513991 PMCID: PMC7280280 DOI: 10.1038/s41598-020-66075-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2019] [Accepted: 05/14/2020] [Indexed: 11/19/2022] Open
Abstract
Infection by macroparasites, such as nematodes, varies within vertebrate host systems; elevated infection is commonly observed in juveniles and males, and, for females, with different reproductive states. However, while such patterns are widely recognized in short-lived model systems, how they apply to long-lived hosts is comparatively understudied. Here, we investigated how infection varies with host age, sex, and female reproduction in a semi-captive population of individually marked Asian elephants Elephas maximus. We carried out 1,977 faecal egg counts (FECs) across five years to estimate nematode loads for 324 hosts. Infection patterns followed an established age-infection curve, whereby calves (5 years) exhibited the highest FECs and adults (45 years) the lowest. However, males and females had similar FECs across their long lifespan, despite distinct differences in life-history strategy and clear sexual dimorphism. Additionally, although mothers invest two years in pregnancy and a further three to five years into lactation, nematode load did not vary with four different measures of female reproduction. Our results provide a much-needed insight into the host-parasite dynamics of a long-lived host; determining host-specific associations with infection in such systems is important for broadening our knowledge of parasite ecology and provides practical applications for wildlife medicine and management.
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Affiliation(s)
| | - Nay Oo Mon
- Department of Animal Science, University of Veterinary Science, Yezin, Myanmar
| | | | - Htoo Htoo Aung
- Myanma Timber Enterprise, Ministry of Natural Resources and Environmental Conservation, Yangon, Myanmar
| | - U Kyaw Nyein
- Myanma Timber Enterprise, Ministry of Natural Resources and Environmental Conservation, Yangon, Myanmar
| | - Win Htut
- Myanma Timber Enterprise, Ministry of Natural Resources and Environmental Conservation, Yangon, Myanmar
| | - Dylan Childs
- Department of Animal and Plant Sciences, University of Sheffield, Sheffield, UK
| | - Virpi Lummaa
- Department of Biology, University of Turku, Turku, Finland
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37
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Costa TSO, Nogueira-Filho SLG, De Vleeschouwer KM, Oliveira LC, de Sousa MBC, Mendl M, Catenacci LS, Nogueira SSC. Individual behavioral differences and health of golden-headed lion tamarins (Leontopithecus chrysomelas). Am J Primatol 2020; 82:e23118. [PMID: 32128855 DOI: 10.1002/ajp.23118] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2019] [Revised: 02/11/2020] [Accepted: 02/15/2020] [Indexed: 12/29/2022]
Abstract
Individual behavioral differences may influence how animals cope with altered environments. Depending on their behavioral traits, individuals may thus vary in how their health is affected by environmental conditions. We investigated the relationship between individual behavior of free-living golden-headed lion tamarins (Leontopithecus chrysomelas) responding to a novel object (to assess exploration-avoidance), and their habitat use and health status (endoparasitism; clinical measures: biometric data, heart rate, respiratory frequency, and temperature; fecal glucocorticoid metabolites). As parasite transmission can be affected by individual variation in social contact and social grooming, we also evaluated whether more sociable individuals show higher endoparasite loads compared with less sociable animals. Four groups living in landscapes with different levels of human disturbance were investigated: two in degraded forest fragments in an agricultural matrix (DFAM-higher disturbance), and two in a cocoa agroforestry system (cabruca-lower disturbance) in the Atlantic forest of South Bahia, Brazil. Using a subjective ratings approach, highly correlated adjective descriptors were combined to produce z-score ratings of one derived variable ("confidence"), which was selected to characterize the tamarins' exploration/avoidance responses during a novel object test. The higher the confidence score, the longer female tamarins spent foraging for prey independent of landscape, and the greater their body mass independent of sex and landscape. Only DFAM individuals showed intestinal parasite infection. Endoparasite loads were positively correlated with the number of grooming partners, suggesting an association between social grooming and transmission (more groomers = more endoparasites). Individual behavior, including in a test situation, may thus have some predictive value for behavior in a free-living context, and for its health consequences.
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Affiliation(s)
- Thaise S O Costa
- Applied Ethology Laboratory, Universidade Estadual de Santa Cruz, Ilhéus, Brazil
| | | | | | - Leonardo C Oliveira
- Faculdade de Formação de Professores, Universidade do Estado do Rio de Janeiro, Rio de Janeiro, Brazil
| | | | - Michael Mendl
- Center for Behavioral Biology, School of Veterinary Science, University of Bristol, Bristol, UK
| | - Lilian S Catenacci
- Departamento de Morfofisiologia Veterinária, Universidade Federal do Piauí, Teresina, Brazil
| | - Selene S C Nogueira
- Applied Ethology Laboratory, Universidade Estadual de Santa Cruz, Ilhéus, Brazil
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38
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Defolie C, Merkling T, Fichtel C. Patterns and variation in the mammal parasite-glucocorticoid relationship. Biol Rev Camb Philos Soc 2020; 95:74-93. [PMID: 31608587 DOI: 10.1111/brv.12555] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2019] [Revised: 08/23/2019] [Accepted: 09/03/2019] [Indexed: 01/24/2023]
Abstract
Parasites are ubiquitous and can strongly affect their hosts through mechanisms such as behavioural changes, increased energetic costs and/or immunomodulation. When parasites are detrimental to their hosts, they should act as physiological stressors and elicit the release of glucocorticoids. Alternatively, previously elevated glucocorticoid levels could facilitate parasite infection due to neuroimmunomodulation. However, results are equivocal, with studies showing either positive, negative or no relationship between parasite infection and glucocorticoid levels. Since factors such as parasite type, infection severity or host age and sex can influence the parasite-glucocorticoid relationship, we review the main mechanisms driving this relationship. We then perform a phylogenetic meta-analysis of 110 records from 65 studies in mammalian hosts from experimental and observational studies to quantify the general direction of this relationship and to identify ecological and methodological drivers of the observed variability. Our review produced equivocal results concerning the direction of the relationship, but there was stronger support for a positive relationship, although causality remained unclear. Mechanisms such as host manipulation for parasite survival, host response to infection, cumulative effects of multiple stressors, and neuro-immunomodulatory effects of glucocorticoids could explain the positive relationship. Our meta-analysis results revealed an overall positive relationship between glucocorticoids and parasitism among both experimental and observational studies. Because all experimental studies included were parasite manipulations, we conclude that parasites caused in general an increase in glucocorticoid levels. To obtain a better understanding of the directionality of this link, experimental manipulation of glucocorticoid levels is now required to assess the causal effects of high glucocorticoid levels on parasite infection. Neither parasite type, the method used to assess parasite infection nor phylogeny influenced the relationship, and there was no evidence for publication bias. Future studies should attempt to be as comprehensive as possible, including moderators potentially influencing the parasite-glucocorticoid relationship. We particularly emphasise the importance of testing hosts of a broad age range, concomitantly measuring sex hormone levels or at least reproductive status, and for observational studies, also considering food availability, host body condition and social stressors to obtain a better understanding of the parasite-glucocorticoid relationship.
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Affiliation(s)
- Charlotte Defolie
- Sociobiology/Anthropology Department, University of Göttingen, Kellnerweg 6, 37077, Göttingen, Germany.,Behavioral Ecology & Sociobiology Unit, German Primate Center, Leibniz Institute for Primate Research, Kellnerweg 4, 37077, Göttingen, Germany.,Leibniz ScienceCampus "Primate Cognition", German Primate Center, Kellnerweg 4, 37077, Göttingen, Germany
| | - Thomas Merkling
- Department of Natural Resource Sciences, McGill University, Macdonald-Stewart Building, 21111 Lakeshore Road, Ste. Anne de Bellevue, Québec, H9X 3V9, Canada
| | - Claudia Fichtel
- Behavioral Ecology & Sociobiology Unit, German Primate Center, Leibniz Institute for Primate Research, Kellnerweg 4, 37077, Göttingen, Germany.,Leibniz ScienceCampus "Primate Cognition", German Primate Center, Kellnerweg 4, 37077, Göttingen, Germany
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39
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Tasdemir D, MacIntosh AJJ, Stergiou P, Kaiser M, Mansour NR, Bickle Q, Huffman MA. Antiprotozoal and antihelminthic properties of plants ingested by wild Japanese macaques (Macaca fuscata yakui) in Yakushima Island. JOURNAL OF ETHNOPHARMACOLOGY 2020; 247:112270. [PMID: 31589965 DOI: 10.1016/j.jep.2019.112270] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2019] [Revised: 09/30/2019] [Accepted: 10/01/2019] [Indexed: 06/10/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Primates forage on a variety of plant parts to balance their dietary intake to meet requirements of energy, nutrition and maintenance, however the reason(s) leading them to ingest some plants which have no nutritional value and/or contain bioactive or even toxic secondary metabolites is recently gaining closer attention. The growing literature suggests that primates consume plants for medicinal purposes (self-medication) as well, particularly when infected with parasites and pathogens (bacteria, viruses, microbes). Interestingly, some of the plants they consume are also used by humans for similar purposes or may have potential uses for humans. MATERIALS AND METHODS As part of a 16-month study of the parasite ecology of a sub-species of Japanese macaques (Macaca fuscata yakui) on the island of Yakushima, we surveyed their feeding habits and collected a subset of plants and plant parts observed being ingested by macaques. The ethnomedicinal value of these plants was surveyed and methanolic extracts of 45 plant parts were tested in vitro against important parasites of humans, including four protozoan parasites Plasmodium falciparum, Trypanosoma brucei rhodesiense, T. cruzi and Leishmania donovani, and the trematode flatworm Schistosoma mansoni. Potential toxicity of the extracts was also assessed on mammalian cells. RESULTS A wide range of ethnomedicinal uses in Asia for these plants is noted, with 37% associated with the treatment of parasites, pathogens and related symptoms. Additionally, the 45 extracts tested showed broad and significant activity against our test organisms. All extracts were active against T. b. rhodesiense. The majority (over 80%) inhibited the growth of P. falciparum and L. donovani. Half of the extracts also displayed antiprotozoal potential against T. cruzi while only several extracts were active against both larval and adult stages of S. mansoni. Cytotoxicity was generally low, although several extracts lacked specific toxicity to test parasites. CONCLUSIONS Our results indicated a number of plants and their parts to have antiparasitic activity not previously reported in the ethnopharmacological literature. Enhanced understanding of the primate diets, particularly during periods of intensified parasite infection risk may help to further narrow down plants of interest for lead compound development. The study of animal self-medication is a complementary approach, with precedence, to drug discovery of new lead drug compounds against human parasitic diseases.
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Affiliation(s)
- Deniz Tasdemir
- Department of Pharmaceutical and Biological Chemistry, Centre for Pharmacognosy and Phytotherapy, School of Pharmacy, University of London, London, WC1N 1AX, UK; GEOMAR Centre for Marine Biotechnology, Research Unit Marine Natural Products Chemistry, GEOMAR Helmholtz Centre for Ocean Research Kiel, 24106, Kiel, Germany; Kiel University, Christian-Albrechts-Platz 4, 24118, Kiel, Germany.
| | - Andrew J J MacIntosh
- Primate Research Institute, Kyoto University, Kanrin 41-2, 484-8506, Inuyama, Japan
| | - Polyxeni Stergiou
- Department of Pharmaceutical and Biological Chemistry, Centre for Pharmacognosy and Phytotherapy, School of Pharmacy, University of London, London, WC1N 1AX, UK
| | - Marcel Kaiser
- Department of Medical Parasitology and Infection Biology, Swiss Tropical and Public Health Institute, CH-4051, Basel, Switzerland; University of Basel, 4003, Basel, Switzerland
| | - Nuha R Mansour
- Department of Infection Biology, Faculty of Infectious and Tropical Disease, London School of Hygiene and Tropical Medicine, London, WC1E 7HT, United Kingdom
| | - Quentin Bickle
- Department of Infection Biology, Faculty of Infectious and Tropical Disease, London School of Hygiene and Tropical Medicine, London, WC1E 7HT, United Kingdom
| | - Michael A Huffman
- Primate Research Institute, Kyoto University, Kanrin 41-2, 484-8506, Inuyama, Japan.
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40
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Strongylid infection varies with age, sex, movement and social factors in wild African elephants. Parasitology 2020; 147:348-359. [PMID: 31840634 DOI: 10.1017/s0031182019001653] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Comparing parasitic infection among individuals of wildlife populations can provide insight into factors that influence wildlife disease ecology. Strongylids are parasitic worms that infect the intestinal tract of vertebrates, and infection with strongylids can be approximated by counting strongylid eggs in dung samples. Here we tested for correlations between strongylid egg counts and 18 different individual characteristics, environmental and social factors in individually known wild African elephants. We counted more eggs in the dung samples of younger elephants and females relative to mature elephants and males. We also found that elephants spending more time outside reserves shed more strongylid eggs than elephants that were more often within reserves. Elephants that were less socially integrated, as measured by how much aggression they received from other elephants, shed fewer strongylid eggs; relatedly, socially isolated orphan elephants that had left their family shed fewer strongylid eggs than elephants that remained with their family. Our results suggest that landscapes altered by livestock grazing and social disruption caused by humans may impact parasitic infection in wildlife.
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41
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Primate Infectious Disease Ecology: Insights and Future Directions at the Human-Macaque Interface. THE BEHAVIORAL ECOLOGY OF THE TIBETAN MACAQUE 2020. [PMCID: PMC7123869 DOI: 10.1007/978-3-030-27920-2_13] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Global population expansion has increased interactions and conflicts between humans and nonhuman primates over shared ecological space and resources. Such ecological overlap, along with our shared evolutionary histories, makes human-nonhuman primate interfaces hot spots for the acquisition and transmission of parasites. In this chapter, we bring to light the importance of human-macaque interfaces in particular as hot spots for infectious disease ecological and epidemiological assessments. We first outline the significance and broader objectives behind research related to the subfield of primate infectious disease ecology and epidemiology. We then reveal how members of the genus Macaca, being among the most socioecologically flexible and invasive of all primate taxa, live under varying degrees of overlap with humans in anthropogenic landscapes. Thus, human-macaque interfaces may favor the bidirectional exchange of parasites. We then review studies that have isolated various types of parasites at human-macaque interfaces, using information from the Global Mammal Parasite Database (GMPD: http://www.mammalparasites.org/). Finally, we elaborate on avenues through which the implementation of both novel conceptual frameworks (e.g., Coupled Systems, One Health) and quantitative network-based approaches (e.g., social and bipartite networks, agent-based modeling) may potentially address some of the critical gaps in our current knowledge of infectious disease ecology at human-primate interfaces.
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42
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Powell SN, Wallen MM, Miketa ML, Krzyszczyk E, Foroughirad V, Bansal S, Mann J. Sociality and tattoo skin disease among bottlenose dolphins in Shark Bay, Australia. Behav Ecol 2019. [DOI: 10.1093/beheco/arz207] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Abstract
Abstract
Social behavior is an important driver of infection dynamics, though identifying the social interactions that foster infectious disease transmission is challenging. Here we examine how social behavior impacts disease transmission in Indo-Pacific bottlenose dolphins (Tursiops aduncus) using an easily identifiable skin disease and social network data. We analyzed tattoo skin disease (TSD) lesions based on photographs collected as part of a 34-year longitudinal study in relation to the sociality of T. aduncus using three metrics (degree, time spent socializing, and time in groups) and network structure, using the k-test. We show that calves with TSD in the second year of life associated more with TSD-positive individuals in the first year of life compared with calves that did not have TSD. Additionally, the network k-test showed that the social network links are epidemiologically relevant for transmission. However, degree, time spent in groups, and time spent socializing were not significantly different between infected and uninfected groups. Our findings indicate that association with infected individuals is predictive of an individual’s risk for TSD and that the social association network can serve as a proxy for studying the epidemiology of skin diseases in bottlenose dolphins.
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Affiliation(s)
- Sarah N Powell
- Department of Biology, Georgetown University, Washington, DC, USA
| | - Megan M Wallen
- Department of Biology, Georgetown University, Washington, DC, USA
| | - Madison L Miketa
- Department of Biology, Georgetown University, Washington, DC, USA
| | - Ewa Krzyszczyk
- Department of Biology, Georgetown University, Washington, DC, USA
| | | | - Shweta Bansal
- Department of Biology, Georgetown University, Washington, DC, USA
| | - Janet Mann
- Department of Biology, Georgetown University, Washington, DC, USA
- Department of Psychology, Georgetown University, Washington, DC, USA
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43
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Erkenswick GA, Watsa M, Gozalo AS, Dudaie S, Bailey L, Muranda KS, Kuziez A, Parker PG. A multiyear survey of helminths from wild saddleback (Leontocebus weddelli) and emperor (Saguinus imperator) tamarins. Am J Primatol 2019; 81:e23063. [PMID: 31692027 PMCID: PMC7029814 DOI: 10.1002/ajp.23063] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2019] [Revised: 09/10/2019] [Accepted: 09/20/2019] [Indexed: 11/08/2022]
Abstract
The establishment of baseline data on parasites from wild primates is essential to understand how changes in habitat or climatic disturbances will impact parasite-host relationships. In nature, multiparasitic infections of primates usually fluctuate temporally and seasonally, implying that the acquisition of reliable data must occur over time. Individual parasite infection data from two wild populations of New World primates, the saddleback (Leontocebus weddelli) and emperor (Saguinus imperator) tamarin, were collected over 3 years to establish baseline levels of helminth prevalence and parasite species richness (PSR). Secondarily, we explored variation in parasite prevalence across age and sex classes, test nonrandom associations of parasite co-occurrence, and assess the relationship between group size and PSR. From 288 fecal samples across 105 individuals (71 saddleback and 34 emperor tamarins), 10 parasite taxa were identified by light microscopy following centrifugation and ethyl-acetate sedimentation. Of these taxa, none were host-specific, Dicrocoeliidae and Cestoda prevalences differed between host species, Prosthenorchis and Strongylida were the most prevalent. Host age was positively associated with Prosthenorchis ova and filariform larva, but negatively with cestode and the Rhabditoidea ova. We detected no differences between expected and observed levels of co-infection, nor between group size and parasite species richness over 30 group-years. Logistic models of individual infection status did not identify a sex bias; however, age and species predicted the presence of four and three parasite taxa, respectively, with saddleback tamarins exhibiting higher PSR. Now that we have reliable baseline data for future monitoring of these populations, next steps involve the molecular characterization of these parasites, and exploration of linkages with health parameters.
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Affiliation(s)
- Gideon A. Erkenswick
- Department of Biology, University of Missouri-St. Louis,
One University Blvd., Saint Louis, MO 63121, USA
- Field Projects International, 7331 Murdoch Ave, Saint
Louis, MO 63119, USA
| | - Mrinalini Watsa
- Department of Biology, University of Missouri-St. Louis,
One University Blvd., Saint Louis, MO 63121, USA
- Field Projects International, 7331 Murdoch Ave, Saint
Louis, MO 63119, USA
| | - Alfonso S. Gozalo
- Comparative Medicine Branch, National Institute of Allergy
and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892,
USA
| | - Shay Dudaie
- Department of Biology, University of Missouri-St. Louis,
One University Blvd., Saint Louis, MO 63121, USA
| | - Lindsey Bailey
- Department of Biology, University of Missouri-St. Louis,
One University Blvd., Saint Louis, MO 63121, USA
| | - Kudakwashe S. Muranda
- Department of Biology, University of Missouri-St. Louis,
One University Blvd., Saint Louis, MO 63121, USA
| | - Alaa Kuziez
- Department of Biology, University of Missouri-St. Louis,
One University Blvd., Saint Louis, MO 63121, USA
| | - Patricia G. Parker
- Department of Biology, University of Missouri-St. Louis,
One University Blvd., Saint Louis, MO 63121, USA
- WildCare Institute, Saint Louis Zoo, One Government Dr.,
Saint Louis, MO 63110, USA
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44
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Biodiversity of protists and nematodes in the wild nonhuman primate gut. ISME JOURNAL 2019; 14:609-622. [PMID: 31719654 PMCID: PMC6976604 DOI: 10.1038/s41396-019-0551-4] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/16/2019] [Revised: 08/09/2019] [Accepted: 09/29/2019] [Indexed: 12/13/2022]
Abstract
Documenting the natural diversity of eukaryotic organisms in the nonhuman primate (NHP) gut is important for understanding the evolution of the mammalian gut microbiome, its role in digestion, health and disease, and the consequences of anthropogenic change on primate biology and conservation. Despite the ecological significance of gut-associated eukaryotes, little is known about the factors that influence their assembly and diversity in mammals. In this study, we used an 18S rRNA gene fragment metabarcoding approach to assess the eukaryotic assemblage of 62 individuals representing 16 NHP species. We find that cercopithecoids, and especially the cercopithecines, have substantially higher alpha diversity than other NHP groups. Gut-associated protists and nematodes are widespread among NHPs, consistent with their ancient association with NHP hosts. However, we do not find a consistent signal of phylosymbiosis or host-species specificity. Rather, gut eukaryotes are only weakly structured by primate phylogeny with minimal signal from diet, in contrast to previous reports of NHP gut bacteria. The results of this study indicate that gut-associated eukaryotes offer different information than gut-associated bacteria and add to our understanding of the structure of the gut microbiome.
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45
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Pafčo B, Kreisinger J, Čížková D, Pšenková-Profousová I, Shutt-Phillips K, Todd A, Fuh T, Petrželková KJ, Modrý D. Genetic diversity of primate strongylid nematodes: Do sympatric nonhuman primates and humans share their strongylid worms? Mol Ecol 2019; 28:4786-4797. [PMID: 31573713 DOI: 10.1111/mec.15257] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2019] [Revised: 09/22/2019] [Accepted: 09/24/2019] [Indexed: 12/11/2022]
Abstract
The close phylogenetic relationship between humans and nonhuman primates (NHPs) can result in a high potential for pathogen exchange. In recent decades, NHP and human interactions have become more frequent due to increasing habitat encroachment and ecotourism. Strongylid communities, which include members of several genera, are typically found in NHPs. Using optimized high-throughput sequencing for strain-level identification of primate strongylids, we studied the structure of strongylid communities in NHPs and humans co-habiting a tropical forest ecosystem in the Central African Republic. General taxonomic assignment of 85 ITS-2 haplotypes indicated that the studied primates harbour at least nine genera of strongylid nematodes, with Oesophagostomum and Necator being the most prevalent. We detected both host-specific and shared strongylid haplotypes. Skin-penetrating Necator gorillaehaplotypes were shared between humans and gorillas but Necator americanus were much more restricted to humans. Strongylid communities of local hunter-gatherers employed as trackers were more similar to those of gorillas compared to their relatives, who spent more time in villages. This was due to lower abundance of human-origin N. americanus in both gorillas and trackers. Habituated gorillas or those under habituation did not show larger overlap of strongylids with humans compared to unhabituated. We concluded that the occurrence of the human-specific strongylids in gorillas does not increase with direct contact between gorillas and humans due to the habituation. Overall, our results indicate that the degree of habitat sharing between hosts, together with mode of parasite transmission, are important factors for parasite spillover among primates.
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Affiliation(s)
- Barbora Pafčo
- Department of Pathology and Parasitology, Faculty of Veterinary Medicine, University of Veterinary and Pharmaceutical Sciences Brno, Czech Republic.,Institute of Vertebrate Biology, Czech Academy of Sciences, Brno, Czech Republic
| | - Jakub Kreisinger
- Institute of Vertebrate Biology, Czech Academy of Sciences, Brno, Czech Republic.,Department of Zoology, Faculty of Science, Charles University, Praha, Czech Republic
| | - Dagmar Čížková
- Institute of Vertebrate Biology, Czech Academy of Sciences, Brno, Czech Republic
| | - Ilona Pšenková-Profousová
- Department of Pathology and Parasitology, Faculty of Veterinary Medicine, University of Veterinary and Pharmaceutical Sciences Brno, Czech Republic
| | | | | | | | - Klára J Petrželková
- Institute of Vertebrate Biology, Czech Academy of Sciences, Brno, Czech Republic.,Institute of Parasitology, Biology Centre, Czech Academy of Sciences, České Budějovice, Czech Republic
| | - David Modrý
- Department of Pathology and Parasitology, Faculty of Veterinary Medicine, University of Veterinary and Pharmaceutical Sciences Brno, Czech Republic.,Institute of Parasitology, Biology Centre, Czech Academy of Sciences, České Budějovice, Czech Republic.,Central European Institute for Technology (CEITEC), University of Veterinary and Pharmaceutical Sciences, Brno, Czech Republic
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46
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Kuthyar S, Manus MB, Amato KR. Leveraging non-human primates for exploring the social transmission of microbes. Curr Opin Microbiol 2019; 50:8-14. [PMID: 31585390 DOI: 10.1016/j.mib.2019.09.001] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Revised: 08/16/2019] [Accepted: 09/02/2019] [Indexed: 12/15/2022]
Abstract
Host social interactions can provide multiple complex pathways for microbial transmission. Here, we suggest non-human primates as models to study the social transmission of commensal or mutualistic microbes due to their high sociality, wide range of group compositions and dominance structures, and diverse group interactions. Microbial sharing from social interactions can positively impact host health by promoting microbial diversity and influencing immunity. Microbes may also drive their own transmission by shaping host behavior, which could lead to fitness benefits for both microbes and hosts. Variation in patterns of social interactions at both the individual and group scale make non-human primates an ideal system to explore the relationship between social behavior, microbial sharing, and their impact on host health and evolution.
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Affiliation(s)
- Sahana Kuthyar
- Department of Anthropology, Northwestern University, Evanston, IL 60208, United States
| | - Melissa B Manus
- Department of Anthropology, Northwestern University, Evanston, IL 60208, United States
| | - Katherine R Amato
- Department of Anthropology, Northwestern University, Evanston, IL 60208, United States.
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47
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Muller Z, Cuthill IC, Harris S. Giraffe (
Giraffa camelopardalis
) social networks in areas of contrasting human activity and lion density. Ethology 2019. [DOI: 10.1111/eth.12923] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Zoe Muller
- School of Biological Sciences University of Bristol Bristol UK
- Giraffe Research & Conservation Trust Nairobi Kenya
| | | | - Stephen Harris
- School of Biological Sciences University of Bristol Bristol UK
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48
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Wilson-Aggarwal JK, Ozella L, Tizzoni M, Cattuto C, Swan GJF, Moundai T, Silk MJ, Zingeser JA, McDonald RA. High-resolution contact networks of free-ranging domestic dogs Canis familiaris and implications for transmission of infection. PLoS Negl Trop Dis 2019; 13:e0007565. [PMID: 31306425 PMCID: PMC6658143 DOI: 10.1371/journal.pntd.0007565] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2018] [Revised: 07/25/2019] [Accepted: 06/20/2019] [Indexed: 02/04/2023] Open
Abstract
Contact patterns strongly influence the dynamics of disease transmission in both human and non-human animal populations. Domestic dogs Canis familiaris are a social species and are a reservoir for several zoonotic infections, yet few studies have empirically determined contact patterns within dog populations. Using high-resolution proximity logging technology, we characterised the contact networks of free-ranging domestic dogs from two settlements (n = 108 dogs, covering >80% of the population in each settlement) in rural Chad. We used these data to simulate the transmission of an infection comparable to rabies and investigated the effects of including observed contact heterogeneities on epidemic outcomes. We found that dog contact networks displayed considerable heterogeneity, particularly in the duration of contacts and that the network had communities that were highly correlated with household membership. Simulations using observed contact networks had smaller epidemic sizes than those that assumed random mixing, demonstrating the unsuitability of homogenous mixing models in predicting epidemic outcomes. When contact heterogeneities were included in simulations, the network position of the individual initially infected had an important effect on epidemic outcomes. The risk of an epidemic occurring was best predicted by the initially infected individual's ranked degree, while epidemic size was best predicted by the individual's ranked eigenvector centrality. For dogs in one settlement, we found that ranked eigenvector centrality was correlated with range size. Our results demonstrate that observed heterogeneities in contacts are important for the prediction of epidemiological outcomes in free-ranging domestic dogs. We show that individuals presenting a higher risk for disease transmission can be identified by their network position and provide evidence that observable traits hold potential for informing targeted disease management strategies.
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Affiliation(s)
| | - Laura Ozella
- Data Science Laboratory, Institute for Scientific Interchange Foundation, Torino, Italy
| | - Michele Tizzoni
- Data Science Laboratory, Institute for Scientific Interchange Foundation, Torino, Italy
| | - Ciro Cattuto
- Data Science Laboratory, Institute for Scientific Interchange Foundation, Torino, Italy
| | - George J. F. Swan
- Environment and Sustainability Institute, University of Exeter, Cornwall, United Kingdom
| | - Tchonfienet Moundai
- Guinea Worm Eradication Programme, Ministry of Public Health, N’Djamena, Republic of Chad
| | - Matthew J. Silk
- Environment and Sustainability Institute, University of Exeter, Cornwall, United Kingdom
| | | | - Robbie A. McDonald
- Environment and Sustainability Institute, University of Exeter, Cornwall, United Kingdom
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49
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Wooddell LJ, Kaburu SSK, Dettmer AM. Dominance rank predicts social network position across developmental stages in rhesus monkeys. Am J Primatol 2019; 82:e23024. [DOI: 10.1002/ajp.23024] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2019] [Revised: 05/01/2019] [Accepted: 05/27/2019] [Indexed: 12/26/2022]
Affiliation(s)
- Lauren J. Wooddell
- Laboratory of Comparative Ethology, Eunice Kennedy Shriver National Institute for Child Health and Human Development National Institutes of Health Poolesville Maryland
- Neuroscience and Behavior, California National Primate Research Center University of California Davis California
| | - Stefano S. K. Kaburu
- Laboratory of Comparative Ethology, Eunice Kennedy Shriver National Institute for Child Health and Human Development National Institutes of Health Poolesville Maryland
- Department of Biomedical Science & Physiology, Faculty of Science and Engineering University of Wolverhampton Wolverhampton UK
| | - Amanda M. Dettmer
- Laboratory of Comparative Ethology, Eunice Kennedy Shriver National Institute for Child Health and Human Development National Institutes of Health Poolesville Maryland
- Yale Child Study Center Yale School of Medicine New Haven Connecticut
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50
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Jarrett JD, Bonnell TR, Young C, Barrett L, Henzi SP. Network integration and limits to social inheritance in vervet monkeys. Proc Biol Sci 2019; 285:rspb.2017.2668. [PMID: 29643208 DOI: 10.1098/rspb.2017.2668] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2017] [Accepted: 03/19/2018] [Indexed: 11/12/2022] Open
Abstract
Social networks can be adaptive for members and a recent model (Ilany and Akçay 2016 Nat. Comm.7, 12084 (doi:10.1038/ncomms12084)) has demonstrated that network structure can be maintained by a simple process of social inheritance. Here, we ask how juvenile vervet monkeys integrate into their adult grooming networks, using the model to test whether observed grooming patterns replicate network structure. Female juveniles, who are philopatric, increased their grooming effort towards adults more than males, although this was not reciprocated by the adults themselves. While more consistent maternal grooming networks, together with maternal network strength, predicted increasing similarity in the patterning of mother-daughter grooming allocations, daughters' grooming networks generally did not match closely those of their mothers. However, maternal networks themselves were not very consistent across time, thus presenting youngsters with a moving target that may be difficult to match. Observed patterns of juvenile female grooming did not replicate the adult network, for which increased association with adults not groomed by their mothers would be necessary. These results suggest that network flexibility, not stability, characterizes our groups and that juveniles are exposed to, and must learn to cope with, temporal shifts in network structure. We hypothesize that this may lead to individual variation in behavioural flexibility, which in turn may help explain why and how variation in sociability influences fitness.
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Affiliation(s)
- Jonathan D Jarrett
- Department of Psychology, University of Lethbridge, Alberta, Canada.,Applied Behavioural Ecology and Ecosystems Research Unit, University of South Africa, Florida, South Africa
| | - Tyler R Bonnell
- Department of Psychology, University of Lethbridge, Alberta, Canada.,Applied Behavioural Ecology and Ecosystems Research Unit, University of South Africa, Florida, South Africa
| | - Christopher Young
- Department of Psychology, University of Lethbridge, Alberta, Canada.,Applied Behavioural Ecology and Ecosystems Research Unit, University of South Africa, Florida, South Africa.,Endocrine Research Laboratory, Department of Anatomy and Physiology, Faculty of Veterinary Science, University of Pretoria, Pretoria, Republic of South Africa
| | - Louise Barrett
- Department of Psychology, University of Lethbridge, Alberta, Canada.,Applied Behavioural Ecology and Ecosystems Research Unit, University of South Africa, Florida, South Africa
| | - S Peter Henzi
- Department of Psychology, University of Lethbridge, Alberta, Canada .,Applied Behavioural Ecology and Ecosystems Research Unit, University of South Africa, Florida, South Africa
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