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Ehrie AJ, Iruri-Tucker AA, Lord YB, Williamson HG, Hunt KD, Polly PD, Fitzpatrick CL, Wasserman MD. Measuring mantled howler monkey (Alouatta palliata) testes via parallel laser photogrammetry: Expanding the use of noninvasive methods. Am J Primatol 2024; 86:e23616. [PMID: 38462743 DOI: 10.1002/ajp.23616] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2023] [Revised: 02/20/2024] [Accepted: 02/24/2024] [Indexed: 03/12/2024]
Abstract
Parallel laser photogrammetry (PLP), which consists of attaching two or three parallel laser beams at a known inter-beam distance to a camera, can be used to collect morphological measurements of organisms noninvasively. The lasers project onto the photo being taken, and because the inter-beam distance is known, they act as a scale for image analysis programs like ImageJ. Traditionally, this method has been used to measure larger morphological traits (e.g., limb length, crown-rump length) to serve as proxies for overall body size, whereas applications to smaller anatomical features remain limited. To that end, we used PLP to measure the testes of 18 free-living mantled howler monkeys (Alouatta palliata) at La Selva Biological Station, Costa Rica. We tested whether this method could reliably measure this relatively small and globular morphology, and whether it could detect differences among individuals. We tested reliability in three ways: within-photo (coefficient of variation [CV] = 4.7%), between-photo (CV = 5.5%), and interobserver (intraclass correlation = 0.92). We found an average volume of 36.2 cm3 and a range of 16.4-54.4 cm3, indicating variation in testes size between individuals. Furthermore, these sizes are consistent with a previous study that collected measurements by hand, suggesting that PLP is a useful method for making noninvasive measurements of testes.
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Affiliation(s)
- Austen J Ehrie
- Department of Biology, Texas A&M University, College Station, Texas, USA
- Center for the Integrative Study of Animal Behavior, Indiana University, Bloomington, Indiana, USA
| | - Alec A Iruri-Tucker
- Center for the Integrative Study of Animal Behavior, Indiana University, Bloomington, Indiana, USA
| | - Yasmin B Lord
- Department of Anthropology, Indiana University, Bloomington, Indiana, USA
| | - Heidi G Williamson
- Department of Ecology and Conservation Biology, Texas A&M University, College Station, Texas, USA
| | - Kevin D Hunt
- Center for the Integrative Study of Animal Behavior, Indiana University, Bloomington, Indiana, USA
- Department of Anthropology, Indiana University, Bloomington, Indiana, USA
| | - P David Polly
- Center for the Integrative Study of Animal Behavior, Indiana University, Bloomington, Indiana, USA
- Department of Geology, Indiana University, Bloomington, Indiana, USA
| | | | - Michael D Wasserman
- Center for the Integrative Study of Animal Behavior, Indiana University, Bloomington, Indiana, USA
- Department of Anthropology, Indiana University, Bloomington, Indiana, USA
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2
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Johnson CE, Tafoya KA, Beck P, Concilio A, White KE, Quirós R, Wasserman MD. Primate richness and abundance is driven by both forest structure and conservation scenario in Costa Rica. PLoS One 2023; 18:e0290742. [PMID: 37703237 PMCID: PMC10499215 DOI: 10.1371/journal.pone.0290742] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2023] [Accepted: 08/14/2023] [Indexed: 09/15/2023] Open
Abstract
Variation in tropical forest management directly affects biodiversity and provisioning of ecosystem services on a global scale, thus it is necessary to compare forests under different conservation approaches such as protected areas, payments for ecosystem services programs (PES), and ecotourism, as well as forests lacking any formal conservation plan. To examine the effectiveness of specific conservation approaches, we examined differences in forest structure and tree recruitment, including canopy cover; canopy height; seedling, sapling, and adult tree density; and average and total diameter at breast height (DBH) across 78 plots in 18 forests across Costa Rica representing protected areas, private forests utilizing PES and/or ecotourism, and private forests not utilizing these economic incentives. The effectiveness of conservation approaches in providing suitable primate habitat was assessed by conducting broad primate census surveys across a subset of eight forests to determine species richness and group encounter rate of three primate species: mantled howler monkey (Alouatta palliata), Central American spider monkey (Ateles geoffroyi), and the white-faced capuchin monkey (Cebus imitator). Only canopy height was significantly different across the three approaches, with protected areas conserving the tallest and likely oldest forests. Canopy height was also significantly associated with the group encounter rate for both mantled howler and spider monkeys, but not for capuchins. Total group encounter rate for all three monkey species combined was higher in incentivized forests than in protected areas, with capuchin and howler monkey group encounter rates driving the trend. Group encounter rate for spider monkeys was higher in protected areas than in incentivized forests. Incentivized conservation (PES and ecotourism) and protected areas are paragons of land management practices that can lead to variation in forest structure across a landscape, which not only protect primate communities, but support the dietary ecologies of sympatric primate species.
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Affiliation(s)
| | - Kathryn A. Tafoya
- Center for the Integrative Study of Animal Behavior, Indiana University, Bloomington, IN, United States of America
| | - Peter Beck
- Department of Environmental Science and Policy, St. Edward’s University, Austin, TX, United States of America
| | - Amy Concilio
- Department of Environmental Science and Policy, St. Edward’s University, Austin, TX, United States of America
| | - Kurt E. White
- Department of Epidemiology and Biostatistics, School of Public Health, Indiana University, Bloomington, IN, United States of America
| | - Rodolfo Quirós
- Las Cruces Research Station, Organization for Tropical Studies, San Vito, Costa Rica
| | - Michael D. Wasserman
- Department of Anthropology, Indiana University, Bloomington, IN, United States of America
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3
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Steiniche T, Wang S, Chester E, Mutegeki R, Rothman JM, Wrangham RW, Chapman CA, Venier M, Wasserman MD. Associations between faecal chemical pollutants and hormones in primates inhabiting Kibale National Park, Uganda. Biol Lett 2023; 19:20230005. [PMID: 37221860 DOI: 10.1098/rsbl.2023.0005] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/25/2023] Open
Abstract
While anthropogenic pollutants are known to be a threat to primates, our understanding of exposure to pollutants in situ and their sub-lethal effects is still limited. We used non-invasive biomonitoring to examine associations between faecal concentrations of 97 chemical pollutants and faecal hormone metabolites of cortisol and oestradiol in four primate species inhabiting Kibale National Park, Uganda (chimpanzees-Pan troglodytes, olive baboons-Papio anubis, red colobus-Piliocolobus tephrosceles and red-tailed monkeys-Cercopithecus ascanius). Across all species (n = 71 samples), results demonstrated positive associations of organochlorine pesticides (OCPs) (β = 0.143, p = 0.020) and organophosphate esters (β = 0.112, p = 0.003) with cortisol in adult females. Additionally, we observed positive associations of OCPs (β = 0.192, p = 0.013) and brominated flame retardants (β = 0.176, p = 0.004) with cortisol in juveniles. Results suggest that cumulative pesticides and flame retardants are disruptive to endocrine function in these populations, which could have implications for development, metabolism and reproduction. Our study further demonstrates that faeces can be an important, non-invasive matrix for examining pollutant-hormone associations in wild primates and other critical wildlife populations.
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Affiliation(s)
- Tessa Steiniche
- Department of Anthropology, Indiana University, Bloomington, 47405, Indiana
| | - Shaorui Wang
- National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Institute of Eco-environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou, 510640, People's Republic of China
| | - Emily Chester
- Department of Anthropology, Indiana University, Bloomington, 47405, Indiana
| | - Richard Mutegeki
- Makerere University Biological Field Station, Kibale National Park, Uganda
| | - Jessica M Rothman
- Department of Anthropology, City University of New York, Hunter College, New York City, 10065, NY, USA
- Conservation Department, Uganda Wildlife Authority, Kampala, Uganda
| | - Richard W Wrangham
- Kibale Chimpanzee Project, and Department of Human Evolutionary Biology, Harvard University, Cambridge, 02138, MA, UK
| | - Colin A Chapman
- Biology Department, Vancouver Island University, Nanaimo, British Columbia, Canada V9R 5S5
- School of Life Sciences, University of KwaZulu-Natal, Scottsville, Pietermaritzburg, 4041, South Africa
- Shaanxi Key Laboratory for Animal Conservation, Northwest University, Xi'an, 710069, People's Republic of China
- Wilson Center, Washington, DC, 20004, USA
| | - Marta Venier
- O'Neill School of Environmental and Public Affairs, Indiana University, Bloomington, 47405, Indiana
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Beehner JC, Alfaro J, Allen C, Benítez ME, Bergman TJ, Buehler MS, Carrera SC, Chester EM, Deschner T, Fuentes A, Gault CM, Godoy I, Jack KM, Kim JD, Kolinski L, Kulick NK, Losch T, Ordoñez JC, Perry SE, Pinto F, Reilly OT, Johnson ET, Wasserman MD. Using an on-site laboratory for fecal steroid analysis in wild white-faced capuchins. Gen Comp Endocrinol 2022; 329:114109. [PMID: 36007549 DOI: 10.1016/j.ygcen.2022.114109] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/03/2022] [Revised: 08/09/2022] [Accepted: 08/11/2022] [Indexed: 11/24/2022]
Abstract
Hormone laboratories located "on-site" where field studies are being conducted have a number of advantages. On-site laboratories allow hormone analyses to proceed in near-real-time, minimize logistics of sample permits/shipping, contribute to in-country capacity-building, and (our focus here) facilitate cross-site collaboration through shared methods and a shared laboratory. Here we provide proof-of-concept that an on-site hormone laboratory (the Taboga Field Laboratory, located in the Taboga Forest Reserve, Costa Rica) can successfully run endocrine analyses in a remote location. Using fecal samples from wild white-faced capuchins (Cebus imitator) from three Costa Rican forests, we validate the extraction and analysis of four steroid hormones (glucocorticoids, testosterone, estradiol, progesterone) across six assays (DetectX® and ISWE, all from Arbor Assays). Additionally, as the first collaboration across three long-term, wild capuchin field sites (Lomas Barbudal, Santa Rosa, Taboga) involving local Costa Rican collaborators, this laboratory can serve as a future hub for collaborative exchange.
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Affiliation(s)
- Jacinta C Beehner
- Department of Psychology, University of Michigan, Ann Arbor, MI 48109, USA; Capuchins at Taboga Research Project, Taboga Forest Reserve, Costa Rica; Department of Anthropology, University of Michigan, Ann Arbor, MI 48109, USA.
| | - José Alfaro
- School for the Environment and Sustainability, University of Michigan, Ann Arbor, MI 48109, USA
| | - Cloe Allen
- Department of Psychology, University of Michigan, Ann Arbor, MI 48109, USA
| | - Marcela E Benítez
- Capuchins at Taboga Research Project, Taboga Forest Reserve, Costa Rica; Department of Anthropology, Emory University, Atlanta, GA 30322, USA
| | - Thore J Bergman
- Department of Psychology, University of Michigan, Ann Arbor, MI 48109, USA; Capuchins at Taboga Research Project, Taboga Forest Reserve, Costa Rica; Department of Ecology & Evolutionary Biology, University of Michigan, Ann Arbor, MI 48109, USA
| | - Margaret S Buehler
- Department of Anthropology, Tulane University, New Orleans, LA 70118, USA; Santa Rosa Primate Project, Santa Rosa National Park, Costa Rica; Tulane National Primate Research Center, Tulane University, Covington, LA 70433, USA
| | - Sofia C Carrera
- Department of Psychology, University of Michigan, Ann Arbor, MI 48109, USA; Capuchins at Taboga Research Project, Taboga Forest Reserve, Costa Rica
| | - Emily M Chester
- Capuchins at Taboga Research Project, Taboga Forest Reserve, Costa Rica; Department of Anthropology, Indiana University, Bloomington, IN 47405, USA
| | - Tobias Deschner
- Institute of Cognitive Science, Comparative BioCognition, University of Osnabrück, Artilleriestrasse 34, 49076 Osnabrück, Germany
| | - Alexander Fuentes
- Capuchins at Taboga Research Project, Taboga Forest Reserve, Costa Rica
| | - Colleen M Gault
- Lomas Barbudal Monkey Project, Lomas Barbudal Biological Reserve, Costa Rica
| | - Irene Godoy
- Lomas Barbudal Monkey Project, Lomas Barbudal Biological Reserve, Costa Rica; Department of Anthropology, University of California, Los Angeles, CA 90095, USA; Department of Animal Behavior, Bielefeld University, 33501 Bielefeld, Germany
| | - Katharine M Jack
- Department of Anthropology, Tulane University, New Orleans, LA 70118, USA; Santa Rosa Primate Project, Santa Rosa National Park, Costa Rica
| | - Justin D Kim
- Department of Psychology, University of Michigan, Ann Arbor, MI 48109, USA; Capuchins at Taboga Research Project, Taboga Forest Reserve, Costa Rica
| | - Lev Kolinski
- Capuchins at Taboga Research Project, Taboga Forest Reserve, Costa Rica
| | - Nelle K Kulick
- Department of Anthropology, Tulane University, New Orleans, LA 70118, USA; Santa Rosa Primate Project, Santa Rosa National Park, Costa Rica
| | - Teera Losch
- Department of Psychology, University of Michigan, Ann Arbor, MI 48109, USA; Capuchins at Taboga Research Project, Taboga Forest Reserve, Costa Rica
| | | | - Susan E Perry
- Lomas Barbudal Monkey Project, Lomas Barbudal Biological Reserve, Costa Rica; Department of Anthropology, University of California, Los Angeles, CA 90095, USA
| | - Fernando Pinto
- Capuchins at Taboga Research Project, Taboga Forest Reserve, Costa Rica
| | - Olivia T Reilly
- Department of Psychology, Georgia State University, Atlanta, GA 30302, USA; Language Research Center, Georgia State University, Atlanta, GA 30302, USA
| | - Elizabeth Tinsley Johnson
- Capuchins at Taboga Research Project, Taboga Forest Reserve, Costa Rica; Department of Integrative Biology, Michigan State University, East Lansing, MI 48824, USA
| | - Michael D Wasserman
- Capuchins at Taboga Research Project, Taboga Forest Reserve, Costa Rica; Department of Anthropology, Indiana University, Bloomington, IN 47405, USA
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Lim JY, Wasserman MD, Veen J, Després-Einspenner ML, Kissling WD. Ecological and evolutionary significance of primates' most consumed plant families. Proc Biol Sci 2021; 288:20210737. [PMID: 34130500 DOI: 10.1098/rspb.2021.0737] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Angiosperms have been essential components of primate diets for millions of years, but the relative importance of different angiosperm families remains unclear. Here, we assess the contribution and ecological and evolutionary significance of plant families to diets of wild primates by compiling an unprecedented dataset of almost 9000 dietary records from 141 primary sources covering 112 primate species. Of the 205 angiosperm plant families recorded in primate diets, only 10 were consumed by more than half of primate species. Plants of the Moraceae and Fabaceae families were the most widely and frequently consumed, and they likely represent keystone resources for primates. Over 75% of species fed on these two families, and together they made up a median of approximately 13% of primate diets. By analysing the relative proportion of different plant parts consumed, we found that Moraceae was mainly eaten as fruit and Fabaceae as non-fruit parts, with the consumption of these two families not showing a significant phylogenetic signal across primate species. Moraceae consumption was associated with small home range sizes, even though more frugivorous primates tended to have larger home ranges compared to more folivorous species, possibly due to the year-round availability of moraceous fruits and the asynchrony in their phenology. Our results suggest that primates may be intricately and subtly shaped by the plant families that they have consumed over millions of years, and highlight the importance of detailed dietary studies to better understand primate ecology and evolution.
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Affiliation(s)
- Jun Ying Lim
- School of Biological Sciences, Nanyang Technological University, Singapore.,Institute for Biodiversity and Ecosystem Dynamics, Department of Theoretical and Computational Biology, University of Amsterdam, Amsterdam, The Netherlands
| | - Michael D Wasserman
- Department of Anthropology and Human Biology Program, Indiana University, Bloomington, IN, USA
| | - Jorin Veen
- Institute for Biodiversity and Ecosystem Dynamics, Department of Theoretical and Computational Biology, University of Amsterdam, Amsterdam, The Netherlands
| | | | - W Daniel Kissling
- Institute for Biodiversity and Ecosystem Dynamics, Department of Theoretical and Computational Biology, University of Amsterdam, Amsterdam, The Netherlands
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6
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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] [What about the content of this article? (0)] [Affiliation(s)] [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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Wang S, Steiniche T, Rothman JM, Wrangham RW, Chapman CA, Mutegeki R, Quirós R, Wasserman MD, Venier M. Feces are Effective Biological Samples for Measuring Pesticides and Flame Retardants in Primates. Environ Sci Technol 2020; 54:12013-12023. [PMID: 32900185 DOI: 10.1021/acs.est.0c02500] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The habitats of wild primates are increasingly threatened by surrounding anthropogenic pressures, but little is known about primate exposure to frequently used chemicals. We applied a novel method to simultaneously measure 21 legacy pesticides (OCPs), 29 current use pesticides (CUPs), 47 halogenated flame retardants (HFRs), and 19 organophosphate flame retardants in feces from baboons in the U.S.A., howler monkeys in Costa Rica, and baboons, chimpanzees, red-tailed monkeys, and red colobus in Uganda. The most abundant chemicals were α-hexachlorocyclohexane (α-HCH), β-hexachlorocyclohexane (β-HCH), and hexachlorobenzene among OCPs across all sites, chlorpyrifos among CUPs in Costa Rica and Indiana, decabromodiphenylethane (DBDPE) in Costa Rica and Indiana and 2, 2', 4, 4'-tetrabromodiphenyl ether (BDE-47) in Uganda as HFRs, and tris(2-butoxyethyl) phosphate (TBOEP) as OPFRs across all sites. The detected chemical concentrations were generally higher in red-tailed monkeys and red colobus than in chimpanzees and baboons. Our methods can be used to examine the threat of chemical pollutants to wildlife, which is critical for endangered species where only noninvasive methods can be used.
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Affiliation(s)
- Shaorui Wang
- O'Neill School of Public and Environmental Affairs, Indiana University, Bloomington, Indiana 47405, United States
| | - Tessa Steiniche
- Department of Anthropology, Indiana University, Bloomington, Indiana 47405, United States
| | - Jessica M Rothman
- Department of Anthropology, Hunter College of the City University of New York, New York, New York 10021, United States
| | - Richard W Wrangham
- Kibale Chimpanzee Project and Department of Human Evolutionary Biology, Harvard University, Cambridge, Massachusetts 02138, United States
| | - Colin A Chapman
- Center for the Advanced Study of Human Paleobiology, Department of Anthropology, George Washington University, Washington, D.C. 20052, United States
- Makerere University Biological Field Station, Kibale National Park, Kibale, Uganda
- Shaanxi Key Laboratory for Animal Conservation, School of Life Sciences, Northwest University, Xi'an 712100, P. R. China
- School of Life Sciences, University of KwaZulu-Natal, Scottsville, Pietermaritzburg 3629, South Africa
| | - Richard Mutegeki
- Makerere University Biological Field Station, Kibale National Park, Kibale, Uganda
| | - Rodolfo Quirós
- Organization for Tropical Studies, San Vito 60803, Costa Rica
| | - Michael D Wasserman
- Department of Anthropology, Indiana University, Bloomington, Indiana 47405, United States
| | - Marta Venier
- O'Neill School of Public and Environmental Affairs, Indiana University, Bloomington, Indiana 47405, United States
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Rich AM, Wasserman MD, Hunt KD, Kaestle FA. Chimpanzee (Pan troglodytes schweinfurthii) Population Spans Multiple Protected Areas in the Albertine Rift. Folia Primatol (Basel) 2020; 91:595-609. [PMID: 32599590 DOI: 10.1159/000508073] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2020] [Accepted: 04/22/2020] [Indexed: 11/19/2022]
Abstract
We used mitochondrial DNA to examine gene flow in a region of western Uganda that has received little attention regarding chimpanzee population dynamics. The area is critical to gene flow between isolated Democratic Republic of Congo populations and the rest of East Africa. None of the chimpanzees in each of the 4 protected areas under consideration (Toro-Semliki Wildlife Reserve, Semuliki National Park, Rwenzori Mountains National Park and Itwara Central Forest Reserve) are fully habituated. Therefore, it is not clear whether one or more populations have historically used this fragmented landscape for (1) regular ranging and/or (2) infrequent dispersal. We incorporated the published sequences of the first hypervariable region of the D-loop of the mitochondrial genome from 3 previously sampled sites (n = 39) while also contributing the first extensive genetic sampling of chimpanzees in Toro-Semliki (n = 80). Our goal was to generate a historical baseline model of metapopulation dynamics in this region and determine which, if any, of these protected areas forms a fragmented landscape for a single chimpanzee population. According to a discriminant analysis of principal components, the haplotypes at Toro-Semliki form a central cluster, and Itwara is its nearest genetic neighbor. Rwenzori Mountains National Park is the most distant neighbor of all protected areas. We performed an analysis of molecular variance for 14 different population models that divided the samples from the 4 protected areas into 2, 3 or 4 populations. The best fit model included 3 populations: Toro-Semliki Wildlife Reserve and Itwara Forest Reserve comprised a single population; Semuliki National Park and Rwenzori Mountains National Park formed 2 additional separate populations (variance among = 9%, p = 0.014). The results indicated that some protected areas comprised distinctive populations, while others formed a fragmented landscape for a population's ranging for foraging purposes. Therefore, the edges of a protected area do not always define a chimpanzee population. We propose a closer examination of those dynamics through renewed sampling. Advances in DNA extraction and next-generation sequencing will allow us to compare thousands of single nucleotide polymorphisms in the genomes of unhabituated chimpanzees living in each of these protected areas.
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Affiliation(s)
- Alicia M Rich
- Department of Biology and Earth Science, Otterbein University, Westerville, Ohio, USA, .,Department of Anthropology, Indiana University, Bloomington, Indiana, USA,
| | | | - Kevin D Hunt
- Department of Anthropology, Indiana University, Bloomington, Indiana, USA
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9
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Chester EM, Fender E, Wasserman MD. Screening for Phytoestrogens using a Cell-based Estrogen Receptor β Reporter Assay. J Vis Exp 2020. [PMID: 32568227 DOI: 10.3791/61005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022] Open
Abstract
Plants are a source of food for many animals, and they can produce thousands of chemicals. Some of these compounds affect physiological processes in the vertebrates that consume them, such as endocrine function. Phytoestrogens, the most well studied endocrine-active phytochemicals, directly interact with the hypothalamo-pituitary gonadal axis of the vertebrate endocrine system. Here we present the novel use of a cell-based assay to screen plant extracts for the presence of compounds that have estrogenic biological activity. This assay uses mammalian cells engineered to highly express estrogen receptor beta (ERβ) and that have been transfected with a luciferase gene. Exposure to compounds with estrogenic activity results in the cells producing light. This assay is a reliable and simple way to test for biological estrogenic activity. It has several improvements over transient transfection assays, most notably, ease of use, the stability of the cells, and the sensitivity of the assay.
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Rich AM, Poindexter SA, Lai A, Steiniche TB, Mutegeki R, Wasserman MD. A camera trap survey in a protected forest with potential for landscape connectivity across Western Uganda. Afr J Ecol 2020. [DOI: 10.1111/aje.12722] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Alicia M. Rich
- Department of Anthropology Boston University Boston MA USA
- Department of Anthropology Indiana University Bloomington IN USA
| | | | - Alyssa Lai
- Department of Anthropology Boston University Boston MA USA
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11
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Benavidez KM, Iruri‐Tucker A, Steiniche T, Wasserman MD. Primate microbial endocrinology: An uncharted frontier. Am J Primatol 2019; 81:e23053. [DOI: 10.1002/ajp.23053] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2019] [Revised: 09/02/2019] [Accepted: 09/03/2019] [Indexed: 12/14/2022]
Affiliation(s)
| | - Alec Iruri‐Tucker
- Department of AnthropologyIndiana UniversityBloomington Indiana
- Center for the Integrative Study of Animal BehaviorIndiana UniversityBloomington Indiana
| | - Tessa Steiniche
- Department of AnthropologyIndiana UniversityBloomington Indiana
| | - Michael D. Wasserman
- Department of AnthropologyIndiana UniversityBloomington Indiana
- Center for the Integrative Study of Animal BehaviorIndiana UniversityBloomington Indiana
- Human Biology ProgramIndiana UniversityBloomington Indiana
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12
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Wang S, Steiniche T, Romanak KA, Johnson E, Quirós R, Mutegeki R, Wasserman MD, Venier M. Atmospheric Occurrence of Legacy Pesticides, Current Use Pesticides, and Flame Retardants in and around Protected Areas in Costa Rica and Uganda. Environ Sci Technol 2019; 53:6171-6181. [PMID: 31081620 DOI: 10.1021/acs.est.9b00649] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Protected areas have developed alongside intensive changes in land use and human settlements in the neighboring landscape. Here, we investigated the occurrence of 21 organochlorine pesticides (OCPs), 14 current use pesticides (CUPs), 47 halogenated flame retardants (HFRs), and 19 organophosphate esters (OPEs) in air around Las Cruces (LC) and La Selva (LS) Biological Stations, Costa Rica, and Kibale National Park (KNP), Uganda using passive air samplers (PAS) with polyurethane foam (PUF) discs (PAS-PUF). Significantly higher concentrations of CUPs were observed around LS, while LC had a higher concentration of OCPs. Land use analysis indicated that LS had a higher fraction of agriculture than LC (33% vs 14%), suggesting the higher CUPs concentration at LS was related to pesticide intensive crops, while higher OCPs concentration at LC may be attributed to the area's long agricultural history characterized by small-scale subsistence farming or long-range transport. In Uganda, CUPs and OCPs were generally lower than in Costa Rica, but high concentrations of HFRs were observed inside KNP, possibly due to human activity at research camps near the protected forest. This is the first study that documented the occurrence of anthropogenic chemicals in the air at protected areas with tropical forests.
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Affiliation(s)
- Shaorui Wang
- School of Public and Environmental Affairs , Indiana University , Bloomington , Indiana , United States
| | - Tessa Steiniche
- Department of Anthropology , Indiana University , Bloomington , Indiana , United States
| | - Kevin A Romanak
- School of Public and Environmental Affairs , Indiana University , Bloomington , Indiana , United States
| | - Eric Johnson
- Department of Anthropology , Indiana University , Bloomington , Indiana , United States
| | - Rodolfo Quirós
- Las Cruces Biological Field Station, Organization for Tropical Studies, San Vito , Costa Rica
| | - Richard Mutegeki
- Makerere University Biological Field Station (MUBFS), Kibale National Park , Uganda
| | - Michael D Wasserman
- Department of Anthropology , Indiana University , Bloomington , Indiana , United States
| | - Marta Venier
- School of Public and Environmental Affairs , Indiana University , Bloomington , Indiana , United States
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Benavidez KM, Chapman CA, Leitman DC, Harris TR, Wasserman MD. Intergroup variation in oestrogenic plant consumption by black‐and‐white colobus monkeys. Afr J Ecol 2019. [DOI: 10.1111/aje.12609] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Kathryn M. Benavidez
- Department of Anthropology Indiana University Bloomington Bloomington Indiana
- Department of Biology Texas State University San Marcos Texas
- Department of Environmental Science & Policy St. Edward’s University Austin Texas
| | - Colin A. Chapman
- School of the Environment McGill University Montreal Quebec Canada
- Wildlife Conservation Society Bronx New York
- Section of Social Systems Evolution, Primate Research Institute Kyoto University Kyoto Japan
- Department of Anthropology McGill University Montreal Quebec Canada
| | - Dale C. Leitman
- Department of Nutritional Science and Toxicology University of California Berkeley Berkeley California
| | - Tara R. Harris
- Director of Conservation and Science Arizona Center for Nature Conservation, Pheonix Zoo Pheonix Arizona
| | - Michael D. Wasserman
- Department of Anthropology Indiana University Bloomington Bloomington Indiana
- Department of Environmental Science & Policy St. Edward’s University Austin Texas
- Department of Anthropology McGill University Montreal Quebec Canada
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Rich AM, Wasserman MD, Deimel C, Breeden SK, Kaestle F, Hunt KD. Is genetic drift to blame for testicular dysgenesis syndrome in Semliki chimpanzees (Pan troglodytes schweinfurthii)? J Med Primatol 2018; 47:257-269. [PMID: 29799118 DOI: 10.1111/jmp.12352] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/14/2018] [Indexed: 11/26/2022]
Abstract
BACKGROUND We present 3 likely cases of testicular dysgenesis syndrome (TDS) within a community of chimpanzees (Pan troglodytes schweinfurthii). We tested whether genetic drift may be the culprit, as a genetic cause has been suspected to account for TDS among other wildlife. METHODS We successfully sequenced a 367-bp segment spanning the first hypervariable region within the D-loop of the mitochondrial genome for 78 DNA samples. RESULTS We found 24 polymorphic sequence sites consisting of 7 singletons and 17 parsimony informative sites. This sample contained 9 haplotypes with a diversity index of 0.78 (SD = 0.03). All tests against the null hypothesis of neutral polymorphisms were non-significant (P > .10). The mismatch distribution of pairwise differences does not fit a Poisson's curve (raggedness index = 0.166; SSD = 0.12; P = 1). CONCLUSIONS Thus, we found no significant signs of genetic isolation, population expansion, or genetic bottleneck. Alternative causes of TDS and how they might pertain to this population are discussed.
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Affiliation(s)
- Alicia M Rich
- Department of Anthropology, Boston University, Boston, MA, USA
- Department of Anthropology, Indiana University, Bloomington, IN, USA
| | | | - Caroline Deimel
- Department of Anthropology, Indiana University, Bloomington, IN, USA
| | - Scott K Breeden
- Marian University College of Osteopathic Medicine, Indianapolis, IN, USA
| | - Frederika Kaestle
- Department of Anthropology, Indiana University, Bloomington, IN, USA
| | - Kevin D Hunt
- Department of Anthropology, Indiana University, Bloomington, IN, USA
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Gogarten JF, Jacob AL, Ghai RR, Rothman JM, Twinomugisha D, Wasserman MD, Chapman CA. Group Size Dynamics over 15+ Years in an African Forest Primate Community. Biotropica 2014. [DOI: 10.1111/btp.12177] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jan F. Gogarten
- Department of Biology; McGill University; 1205 Docteur Penfield Montreal QC Canada H3A 1B1
- Department of Primatology; Max Planck Institute for Evolutionary Anthropology; Deutscher Platz 6 Leipzig 04103 Germany
- Research Group Epidemiology of Highly Pathogenic Microorganisms; Robert Koch Institut; Nordufer 20 13353 Berlin Germany
| | - Aerin L. Jacob
- Department of Biology; McGill University; 1205 Docteur Penfield Montreal QC Canada H3A 1B1
- Department of Geography; University of Victoria; PO Box 3060 STN CSC Victoria BC Canada V8W 3R4
| | - Ria R. Ghai
- Department of Biology; McGill University; 1205 Docteur Penfield Montreal QC Canada H3A 1B1
| | - Jessica M. Rothman
- Department of Anthropology; Hunter College of the City University of New York, and New York Consortium in Evolutionary Primatology; 695 Park Avenue New York NY 10065 U.S.A
| | | | - Michael D. Wasserman
- School of Environmental Science & Policy; St. Edward's University; 3001 South Congress Ave. Austin TX 78704-6489 U.S.A
| | - Colin A. Chapman
- Makerere University Biological Field Station; PO Box 967 Fort Portal Uganda
- McGill School of Environment and Department of Anthropology; McGill University; Montreal QC Canada H3A 2T7
- The Wildlife Conservation Society; 2300 Southern Blvd Bronx NY 10640 U.S.A
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Bonnell TR, Campennì M, Chapman CA, Gogarten JF, Reyna-Hurtado RA, Teichroeb JA, Wasserman MD, Sengupta R. Emergent group level navigation: an agent-based evaluation of movement patterns in a folivorous primate. PLoS One 2013; 8:e78264. [PMID: 24205174 PMCID: PMC3804626 DOI: 10.1371/journal.pone.0078264] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2013] [Accepted: 09/10/2013] [Indexed: 12/03/2022] Open
Abstract
The foraging activity of many organisms reveal strategic movement patterns, showing efficient use of spatially distributed resources. The underlying mechanisms behind these movement patterns, such as the use of spatial memory, are topics of considerable debate. To augment existing evidence of spatial memory use in primates, we generated movement patterns from simulated primate agents with simple sensory and behavioral capabilities. We developed agents representing various hypotheses of memory use, and compared the movement patterns of simulated groups to those of an observed group of red colobus monkeys (Procolobus rufomitratus), testing for: the effects of memory type (Euclidian or landmark based), amount of memory retention, and the effects of social rules in making foraging choices at the scale of the group (independent or leader led). Our results indicate that red colobus movement patterns fit best with simulated groups that have landmark based memory and a follow the leader foraging strategy. Comparisons between simulated agents revealed that social rules had the greatest impact on a group's step length, whereas the type of memory had the highest impact on a group's path tortuosity and cohesion. Using simulation studies as experimental trials to test theories of spatial memory use allows the development of insight into the behavioral mechanisms behind animal movement, developing case-specific results, as well as general results informing how changes to perception and behavior influence movement patterns.
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Affiliation(s)
- Tyler R. Bonnell
- Deptartment of Geography, McGill University, Montreal, Quebec, Canada
| | - Marco Campennì
- Max Planck Institute for Evolutionary Anthropology, Leipzig, Germany
| | - Colin A. Chapman
- Deptartment of Anthropology & McGill School of Environment, McGill University, Montreal, Quebec and Wildlife Conservation Society, Bronx, New York, United States of America
| | - Jan F. Gogarten
- Deptartment of Biology, McGill University, Montreal, Quebec, Canada
| | | | - Julie A. Teichroeb
- University of California Santa Cruz, Anthropology Department, Santa Cruz, California, United States of America
| | | | - Raja Sengupta
- Deptartment of Geography, McGill University, Montreal, Quebec, Canada
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Wasserman MD, Chapman CA, Milton K, Gogarten JF, Wittwer DJ, Ziegler TE. Estrogenic plant consumption predicts red colobus monkey (Procolobus rufomitratus) hormonal state and behavior. Horm Behav 2012; 62:553-62. [PMID: 23010620 PMCID: PMC3513326 DOI: 10.1016/j.yhbeh.2012.09.005] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/26/2012] [Revised: 09/16/2012] [Accepted: 09/17/2012] [Indexed: 10/27/2022]
Abstract
Numerous studies have examined the effects of anthropogenic endocrine disrupting compounds; however, very little is known about the effects of naturally occurring plant-produced estrogenic compounds (i.e., phytoestrogens) on vertebrates. To examine the seasonal pattern of phytoestrogen consumption and its relationship to hormone levels (407 fecal samples analyzed for estradiol and cortisol) and social behavior (aggression, mating, and grooming) in a primate, we conducted an 11-month field study of red colobus (Procolobus rufomitratus) in Kibale National Park, Uganda. The percent of diet from estrogenic plants averaged 10.7% (n=45 weeks; range: 0.7-32.4%). Red colobus fed more heavily on estrogenic Millettia dura young leaves during weeks of higher rainfall, and the consumption of this estrogenic item was positively correlated to both their fecal estradiol and cortisol levels. Social behaviors were related to estradiol and cortisol levels, as well as the consumption of estrogenic plants and rainfall. The more the red colobus consumed estrogenic plants the higher their rates of aggression and copulation and the lower their time spent grooming. Our results suggest that the consumption of estrogenic plants has important implications for primate health and fitness through interactions with the endocrine system and changes in hormone levels and social behaviors.
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Affiliation(s)
- Michael D. Wasserman
- Department of Environmental Science, Policy, and Management, University of California, Berkeley, 130 Mulford Hall #3114, Berkeley, CA 94720-3114, USA
- Department of Anthropology, McGill University, 855 Sherbrooke St. West, Montreal, QC H3A 2T7, Canada
- Corresponding author: Department of Anthropology, McGill University, 855 Sherbrooke St. West, Montreal, QC H3A 2T7, Canada. Phone: +1 514 398 4400 ext. 089759, Fax: +1 514 398 7476,
| | - Colin A. Chapman
- Department of Anthropology, McGill University, 855 Sherbrooke St. West, Montreal, QC H3A 2T7, Canada
- McGill School of Environment, McGill University, 855 Sherbrooke St. West, Montreal, QC H3A 2T7, Canada
- Wildlife Conservation Society, 185th St. and Southern Blvd., Bronx, NY 10460, USA
| | - Katharine Milton
- Department of Environmental Science, Policy, and Management, University of California, Berkeley, 130 Mulford Hall #3114, Berkeley, CA 94720-3114, USA
| | - Jan F. Gogarten
- Department of Biology, McGill University, 1205 Dr. Penfield Ave., Montreal, QC, H3A 1B1, Canada
| | - Dan J. Wittwer
- Wisconsin National Primate Research Center, University of Wisconsin-Madison, 1220 Capitol Court Madison, WI 53715, USA
| | - Toni E. Ziegler
- Wisconsin National Primate Research Center, University of Wisconsin-Madison, 1220 Capitol Court Madison, WI 53715, USA
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Wasserman MD, Taylor-Gutt A, Rothman JM, Chapman CA, Milton K, Leitman DC. Estrogenic plant foods of red colobus monkeys and mountain gorillas in Uganda. Am J Phys Anthropol 2012; 148:88-97. [PMID: 22460223 DOI: 10.1002/ajpa.22045] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2011] [Accepted: 02/03/2012] [Indexed: 12/22/2022]
Abstract
Phytoestrogens, or naturally occurring estrogen-mimicking compounds, are found in many human plant foods, such as soybeans (Glycine max) and other legumes. Because the consumption of phytoestrogens may result in both health benefits of protecting against estrogen-dependent cancers and reproductive costs of disrupting the developing endocrine system, considerable biomedical research has been focused on the physiological and behavioral effects of these compounds. Despite this interest, little is known about the occurrence of phytoestrogens in the diets of wild primates, nor their likely evolutionary importance. We investigated the prevalence of estrogenic plant foods in the diets of two folivorous primate species, the red colobus monkey (Procolobus rufomitratus) of Kibale National Park and mountain gorilla (Gorilla beringei) of Bwindi Impenetrable National Park, both in Uganda. To examine plant foods for estrogenic activity, we screened 44 plant items (species and part) comprising 78.4% of the diet of red colobus monkeys and 53 plant items comprising 85.2% of the diet of mountain gorillas using transient transfection assays. At least 10.6% of the red colobus diet and 8.8% of the gorilla diet had estrogenic activity. This was mainly the result of the red colobus eating three estrogenic staple foods and the gorillas eating one estrogenic staple food. All estrogenic plants exhibited estrogen receptor (ER) subtype selectivity, as their phytoestrogens activated ERβ, but not ERα. These results demonstrate that estrogenic plant foods are routinely consumed by two folivorous primate species. Phytoestrogens in the wild plant foods of these two species and many other wild primates may have important implications for understanding primate reproductive ecology.
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Affiliation(s)
- Michael D Wasserman
- Department of Environmental Science, Policy, and Management, University of California, Berkeley, 94720, USA.
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Rothman JM, Chapman CA, Twinomugisha D, Wasserman MD, Lambert JE, Goldberg TL. Measuring physical traits of primates remotely: the use of parallel lasers. Am J Primatol 2009; 70:1191-5. [PMID: 18767123 DOI: 10.1002/ajp.20611] [Citation(s) in RCA: 83] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Physical traits, such as body size, and processes like growth can be used as indices of primate health and can add to our understanding of life history and behavior. Accurately measuring physical traits in the wild can be challenging because capture is difficult, disrupts animals, and may cause injury. To measure physical traits of arboreal primates remotely, we adapted a parallel laser technique that has been used with terrestrial and marine mammals. Two parallel lasers separated by a known distance (4 cm) and mounted onto a digital camera are projected onto an animal. When a photograph is taken, the laser projections on the target provide a scale bar. We validated the technique for measuring the physical traits of identifiable red colobus monkeys (Procolobus rufomitratus) in Kibale National Park, Uganda. First, we photographed the tails of monkeys with laser projections and compared these with measurements previously obtained when the animals were captured. Second, we manually measured the distance between two markers placed on tree branches at similar heights to those used by monkeys, and compared them with the measurements obtained through digital photographs of the markers with parallel laser projections. The mean tail length of the monkeys via manual measurements was 63.3+/-4.4 cm, and via remote measurements was 63.0+/-4.1 cm. The mean distance between the markers on tree branches via manual measurements was 13.8+/-3.59 cm, and via remote measurements was 13.9+/-3.58 cm. The mean error using parallel lasers was 1.7% in both cases. Although the needed precision will depend on the question asked, our results suggest that sufficiently precise measurements of physical traits or substrates of arboreal primates can be obtained remotely using parallel lasers.
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Affiliation(s)
- Jessica M Rothman
- McGill School of Environment, McGill University, Montreal, Que., Canada.
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Snaith TV, Chapman CA, Rothman JM, Wasserman MD. Bigger groups have fewer parasites and similar cortisol levels: a multi-group analysis in red colobus monkeys. Am J Primatol 2008; 70:1072-80. [PMID: 18666135 DOI: 10.1002/ajp.20601] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
If stress and disease impose fitness costs, and if those costs vary as a function of group size, then stress and disease should exert selection pressures on group size. We assessed the relationships between group size, stress, and parasite infections across nine groups of red colobus monkeys (Procolobus rufomitratus) in Kibale National Park, Uganda. We used fecal cortisol as a measure of physiological stress and examined fecal samples to assess the prevalence and intensity of gastrointestinal helminth infections. We also examined the effect of behaviors that could potentially reduce parasite transmission (e.g., increasing group spread and reducing social interactions). We found that cortisol was not significantly related to group size, but parasite prevalence was negatively related to group size and group spread. The observed increase in group spread could have reduced the rate of parasite transmission in larger groups; however, it is not clear whether this was a density-dependent behavioral counter-strategy to infection or a response to food competition that also reduced parasite transmission. The results do not support the suggestion that gastrointestinal parasitism or stress directly imposed group-size-related fitness costs, and we cannot conclude that they are among the mechanisms limiting group size in red colobus monkeys.
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Affiliation(s)
- Tamaini V Snaith
- Department of Anthropology, McGill University, Montreal, Que., Canada.
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Chapman CA, Wasserman MD, Gillespie TR, Speirs ML, Lawes MJ, Saj TL, Ziegler TE. Do food availability, parasitism, and stress have synergistic effects on red colobus populations living in forest fragments? Am J Phys Anthropol 2006; 131:525-34. [PMID: 16958077 DOI: 10.1002/ajpa.20477] [Citation(s) in RCA: 193] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Identifying factors that influence animal density is a fundamental goal in ecology that has taken on new importance with the need to develop informed management plans. This is particularly the case for primates as the tropical forest that supports many species is being rapidly converted. We use a system of forest fragments adjacent to Kibale National Park, Uganda, to examine if food availability and parasite infections have synergistic affects on red colobus (Piliocolobus tephrosceles) abundance. Given that the size of primate populations can often respond slowly to environmental changes, we also examined how these factors influenced cortisol levels. To meet these objectives, we monitored gastrointestinal parasites, evaluated fecal cortisol levels, and determined changes in food availability by conducting complete tree inventories in eight fragments in 2000 and 2003. Red colobus populations declined by an average of 21% among the fragments; however, population change ranged from a 25% increase to a 57% decline. The cumulative basal area of food trees declined by an average of 29.5%; however, forest change was highly variable (a 2% gain to a 71% decline). We found that nematode prevalence averaged 58% among fragments (range 29-83%). The change in colobus population size was correlated both with food availability and a number of indices of parasite infections. A path analysis suggests that change in food availability has a strong direct effect on population size, but it also has an indirect effect via parasite infections.
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Affiliation(s)
- Colin A Chapman
- Department of Anthropology and McGill School of Environment, McGill University, Montreal, QC H3A 2T7, Canada.
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Chapman CA, Webb T, Fronstin R, Wasserman MD, Santamaria AM. Assessing dietary protein of colobus monkeys through faecal sample analysis: a tool to evaluate habitat quality. Afr J Ecol 2005. [DOI: 10.1111/j.1365-2028.2005.00575.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Abstract
Traditionally 'empathy' has been viewed from the perspective of a one-person psychology and 'the facts' discovered via empathic understanding have been thought to reflect accurately what the patient was experiencing, ideally uncontaminated by anything coming from the analyst. In contrast to this position, the author argues that the analyst always actively influences what he discovers empathically. Specifically, the analyst's theoretical biases always shape what he empathically understands. The contributions of Owen Renik and, to a lesser extent, Irwin Hoffman are critically examined, with a focus on how their two-person perspectives shape the analyst's ability to empathise. Their clinical stances, which emphasise the role of corrective emotional experiences and countertransference enactments, are compared to what the author calls an 'integrated stance', which attempts to integrate elements of one- and two-person psychologies while retaining interpretation as primary in bringing about change. It is concluded that the techniques advocated by Renik and Hoffman potentially restrict empathic understanding in two ways. First, they take positions that limit the development of regressive transference reactions. Second, because they de-emphasise monitoring countertransference urges, they actively facilitate more frequent countertransference enactments, which then may not be interpreted as fully as by the analyst working from an 'integrated stance'. Clinical examples are used to illustrate differences between these two stances.
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Abstract
I have reviewed Hobson and McCarley's activation-synthesis hypothesis of dreaming which attempts to show that the instigation and certain formal aspects of dreaming are physiologically determined by a brainstem neuronal mechanism, their reasons for suggesting major revisions in psychoanalytic dream theory, and neurophysiological data that are inconsistent with their hypothesis. I then discussed the concept of mind-body isomorphism pointing out that they use this concept inconsistently, that despite their denials they regularly view physiology as primary and psychological processes as secondary, and that they frequently make the error of mixing the languages of physiology and psychology in their explanatory statements. Finally, in order to evaluate Hobson and McCarley's claim that their findings require revision of psychoanalytic dream theory, I examined their discussions of chase dreams, flying dreams, sexual dreams, the formal characteristics of dreams, the forgetting of dreams, and the instigation of dreams. I concluded that although their fascinating physiological findings may be central to understanding the neurobiology of REM sleep, they do not alter the meaning and interpretation of dreams gleaned through psychoanalytic study.
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Wasserman MD, Pollak CP, Spielman AJ, Weitzman ED. Theoretical and technical problems in the measurement of nocturnal penile tumescence for the differential diagnosis of impotence. Psychosom Med 1980; 42:575-85. [PMID: 7465743 DOI: 10.1097/00006842-198011000-00006] [Citation(s) in RCA: 60] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Theoretical and technical problems in using Nocturnal Penile Tumescence (NPT) measurements for the differential diagnosis of impotence are discussed and possible solutions are offered: 1) The basic assumption that NPT measurements can distinguish psychogenic from organic impotence has never been demonstrated in patients shown to be psychogenically and organically impotent independent of the NPT measurements themselves. Studies attempting to do this are necessary to determine definitively the limits of the clinical applicability of this important diagnostic tool. 2) Evidence is presented showing that though a direct observation of one of the patient's fullest erections is required for an adequate NPT evaluation, this is not always done. The danger of misdiagnosis if this step is omitted is illustrated with a case report. 3) Disagreements in the literature about NPT criteria for diagnosing psychogenic impotence are discussed and criteria are suggested that are based on demonstrating the intactness of the physiological mechanisms required for erection rather than on values recorded in normal subjects.
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Abstract
A case of impotence with significantly impaired nocturnal penile tumescence (NPT) following transurethral resection of the prostate (TURP) is described. The patient was studied with polysomnographic recording including measurements of NPT for three consecutive nights at nine months after surgery and showed a total absence of full erections. Possible causes of his impotence are discussed. It is concluded that the total clinical picture strongly suggests that the erectile dysfunction was a result of physiologic complications of the surgery. Methodologic problems in past work are discussed, and the need for detailed diagnostic studies is stressed. The sleep studies that should be a part of this comprehensive evaluation are described.
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Wasserman MD, Pollak CP, Spielman AJ, Weitzman ED. The differential diagnosis of impotence. The measurement of nocturnal penile tumescence. JAMA 1980; 243:2038-42. [PMID: 7373743] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
The literature on nocturnal penile tumescence (NPT) and impotence is briefly reviewed. Available evidence suggests that measurement of NPT provides objective data, which when combined with a thorough clinical evaluation can be helpful in distinguishing psychogenic from organic impotence in approximately 80% of those patients who present this differential diagnostic problem. Further research is needed to determine whether some psychogenically impotent patients may have impaired NPT. The interdisciplinary evaluation employed at our center is described, and clinical material illustrating the usefulness of this technique is presented. The potential errors that can result from the use of portable NPT monitoring devices are discussed.
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