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Costantini D. A meta-analysis of impacts of immune response and infection on oxidative status in vertebrates. CONSERVATION PHYSIOLOGY 2022; 10:coac018. [PMID: 35492421 PMCID: PMC9040321 DOI: 10.1093/conphys/coac018] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2021] [Revised: 01/24/2022] [Accepted: 03/11/2022] [Indexed: 05/06/2023]
Abstract
Inferring from patterns observed in biomedical research, ecoimmunological theory predicts that oxidative stress is a ubiquitous physiological cost that contributes to generating variation in immune function between individuals or species. This prediction is, however, often challenged by empirical studies testing the relationship between immune response or infection and oxidative status markers. This points out the importance of combining ecological immunology and oxidative stress ecology to further our understanding of the proximate causes and fitness consequences of individual variation in health, and adaptability to natural and anthropogenic environmental changes. I reviewed evidence and performed phylogenetic meta-analyses of changes in oxidative status markers owing to either injection of an antigen or infection in captive and free-living vertebrates (141 studies, 1262 effect sizes, 97 species). The dataset was dominated by studies on fish, birds and mammals, which provided 95.8% of effect sizes. Both antigen injection and parasite exposure were associated with changes of oxidative status. There were significant effects of taxonomic class and experimental environment (captivity vs. wild). In contrast with my predictions, age category (young vs. adult), study design (correlational vs. experimental) and proxies of pace of life (clutch size, litter size, and body mass; for birds and mammals only) were negligible in this dataset. Several methodological aspects (type of immunostimulant, laboratory assay, tissue analysed) showed significant effects on both strength and direction of effect. My results suggest that alterations of oxidative status are a widespread consequence of immune function across vertebrates. However, this work also identified heterogeneity in strength and direction of effect sizes, which suggests that immune function does not necessarily result in oxidative stress. Finally, this work identifies methodological caveats that might be relevant for the interpretation and comparability of results and for the application in conservation programs.
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Affiliation(s)
- David Costantini
- Unité Physiologie Moléculaire et Adaptation, UMR 7221, Muséum National d’Histoire Naturelle, CNRS, CP32, 57 rue Cuvier 75005 Paris, France
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2
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Wemer L, Hegemann A, Isaksson C, Nebel C, Kleindorfer S, Gamauf A, Adrion M, Sumasgutner P. Reduced ectoparasite load, body mass and blood haemolysis in Eurasian kestrels (Falco tinnunculus) along an urban-rural gradient. Naturwissenschaften 2021; 108:42. [PMID: 34491450 PMCID: PMC8423637 DOI: 10.1007/s00114-021-01745-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Revised: 07/22/2021] [Accepted: 08/09/2021] [Indexed: 12/21/2022]
Abstract
Urbanisation is proceeding at an alarming rate which forces wildlife to either retreat from urban areas or cope with novel stressors linked to human presence and activities. For example, urban stressors like anthropogenic noise, artificial light at night and chemical pollution can have severe impacts on the physiology of wildlife (and humans), in particular the immune system and antioxidant defences. These physiological systems are important to combat and reduce the severity of parasitic infections, which are common among wild animals. One question that then arises is whether urban-dwelling animals, whose immune and antioxidant system are already challenged by the urban stressors, are more susceptible to parasitic infections. To assess this, we studied nestlings of Eurasian kestrels (Falco tinnunculus) in Vienna, Austria, during 2015 and 2017. We measured biomarkers of innate immune function, oxidative stress and body mass index and ectoparasite infection intensity in 143 nestlings (from 56 nests) along an urban gradient. Nestlings in more urbanised areas had overall fewer ectoparasites, lower haemolysis (complement activity) and lower body mass index compared to nestlings in less urbanised areas. None of the other immune or oxidative stress markers were associated with the urban gradient. Despite some non-significant results, our data still suggest that kestrel nestlings experience some level of reduced physiological health, perhaps as a consequence of exposure to more urban stressors or altered prey availability in inner-city districts even though they had an overall lower ectoparasite burden in these heavily urbanised areas.
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Affiliation(s)
- Laura Wemer
- Department of Integrative Zoology, University of Vienna, Vienna, Austria.,Natural History Museum Vienna, Vienna, Austria
| | - Arne Hegemann
- Department of Biology, Lund University, Lund, Sweden
| | | | - Carina Nebel
- FitzPatrick Institute of African Ornithology, DSI-NRF Centre of Excellence, University of Cape Town, Cape Town, South Africa.,Department of Biology, University of Turku, Turku, Finland
| | - Sonia Kleindorfer
- Konrad Lorenz Research Centre, Core Facility for Behaviour and Cognition, Department of Behavioral & Cognitive Biology, University of Vienna, Vienna, Austria.,College of Science and Engineering, Flinders University, Bedford Park, SA, 5001, Australia
| | | | - Marius Adrion
- Department of Integrative Zoology, University of Vienna, Vienna, Austria.,Natural History Museum Vienna, Vienna, Austria.,NABU E.V, Head office, Berlin, Germany
| | - Petra Sumasgutner
- Natural History Museum Vienna, Vienna, Austria. .,FitzPatrick Institute of African Ornithology, DSI-NRF Centre of Excellence, University of Cape Town, Cape Town, South Africa. .,Konrad Lorenz Research Centre, Core Facility for Behaviour and Cognition, Department of Behavioral & Cognitive Biology, University of Vienna, Vienna, Austria.
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3
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How king penguins advertise their sexual maturity. Anim Behav 2021. [DOI: 10.1016/j.anbehav.2021.05.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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4
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Alaasam VJ, Keehn JE, Durso AM, French SS, Feldman CR. Ectoparasite Load Is Reduced in Side-Blotched Lizards ( Uta stansburiana) at Wind Farms: Implications for Oxidative Stress. Physiol Biochem Zool 2021; 94:35-49. [PMID: 33296296 DOI: 10.1086/712100] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
AbstractWind-generated power is one of the fastest growing alternative energy strategies worldwide and will likely account for 20% of US energy production by 2030. The installation and maintenance of wind farms are associated with increased human activity and can generate noise pollution, disturb and fragment habitat, and even alter community composition and structure. These environmental and ecological changes can increase physiological stress for vertebrates and affect important life-history attributes, such as immune function. However, little is known about how wind farms influence physiology and disease or parasite resistance in nonvolant wildlife. Here, we test the notion that renewable wind farms increase physiological stress and correlated aspects of disease resistance (parasite load) in a common desert vertebrate, the side-blotched lizard (Uta stansburiana). We captured lizards from three wind farms and three undisturbed reference sites in the San Gorgonio Pass wind resource area in the Mojave Desert, California. We quantified individual external parasite loads and measured plasma antioxidant capacity and concentrations of reactive oxygen metabolites as a combined metric of oxidative stress. Contrary to our expectations, individuals at wind farm sites had significantly fewer external parasites than at undeveloped sites. Additionally, we found a slight positive correlation between parasite load and oxidative stress for individuals at wind farm sites but not at reference sites. Our results demonstrate a complex, potentially context-dependent relationship between stress physiology and disease resistance for lizards in anthropogenically disturbed environments. Understanding how wind farms affect the physiology and ecoimmunology of terrestrial fauna is necessary to mitigate the ecological costs of alternative energy development.
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5
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Dumbo JC, Gilbert BM, Avenant-Oldewage A. Oxidative stress biomarkers in the African sharptooth catfish, Clarias gariepinus, associated with infections by adult digeneans and water quality. INTERNATIONAL JOURNAL FOR PARASITOLOGY-PARASITES AND WILDLIFE 2020; 12:232-241. [PMID: 32714829 PMCID: PMC7369607 DOI: 10.1016/j.ijppaw.2020.07.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/08/2020] [Revised: 07/02/2020] [Accepted: 07/03/2020] [Indexed: 12/17/2022]
Abstract
Parasites and environmental features could synergistically act as stressors to the health of their hosts. The objectives of this study were to evaluate the effect of: (i) water quality, host sex, size and body condition on adult digenean parasite infections; (ii) digenean infections and host sex and size on the oxidative stress biomarkers and body condition of hosts; and (iii) water quality on the oxidative stress biomarkers and body condition in Clarias gariepinus. Water quality variables were measured and C. gariepinus were collected each month for a year for examination of two intestinal digeneans, Masenia nkomatiensis and Glossidium pedatum, and determination of body condition and measurement of biomarkers in the host. The results indicated that the intensity of M. nkomatiensis was positively correlated with electrical conductivity and total dissolved solids. Prevalence of G. pedatum was negatively correlated with electrical conductivity, salinity and total dissolved solids. High summer water temperature was strongly associated with high digenean infections. There was no host body condition, sex or size bias for any of the parasite infection variables. Differences in the biomarker levels and body condition between uninfected fish and those infected with M. nkomatiensis or G. pedatum were insignificant indicating a low effect of the digenean parasites on oxidative stress biomarkers and body condition in the fish. However, total protein levels were positively associated with host size, and lipid peroxidation was negatively related to host body condition; total protein levels were also positively correlated with temperature and negatively correlated with dissolved oxygen. Host body condition was only negatively correlated with dissolved oxygen. Overall the trends observed in the data showed that the parasites have a negligible effect on oxidative stress in host fish and the trends observed for all variables (water quality, stress biomarkers, body condition and parasite infections) showed a strong seasonal pattern.
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Affiliation(s)
- José Chissiua Dumbo
- Department of Zoology, University of Johannesburg, P.O. Box 524 Auckland Park, Johannesburg, 2006, South Africa.,Department of Biological Sciences, Eduardo Mondlane University, P.O. Box 257, Maputo, Mozambique
| | - Beric Michael Gilbert
- Department of Zoology, University of Johannesburg, P.O. Box 524 Auckland Park, Johannesburg, 2006, South Africa.,Spectrum Analytical Facility, University of Johannesburg, P.O. Box 524 Auckland Park, Johannesburg, 2006, South Africa
| | - Annemariè Avenant-Oldewage
- Department of Zoology, University of Johannesburg, P.O. Box 524 Auckland Park, Johannesburg, 2006, South Africa
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6
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Mészáros B, Jordán L, Bajer K, Martín J, Török J, Molnár O. Relationship between oxidative stress and sexual coloration of lizards depends on thermal habitat. THE SCIENCE OF NATURE - NATURWISSENSCHAFTEN 2019; 106:55. [PMID: 31612286 DOI: 10.1007/s00114-019-1649-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2019] [Revised: 08/26/2019] [Accepted: 08/29/2019] [Indexed: 11/29/2022]
Abstract
Sexual signals serve as an honest indicator of individual quality, reflecting either developmental and/or maintenance costs. A possible underlying physiological mechanism is oxidative stress, which could mediate energy trade-offs between sexual signals and other quality traits. In ectotherms, thermal performance acts as a key indicator of individual quality and influence signal intensity. We investigated how oxidative state is reflected in visual signals of lizards from different thermal habitats. According to our hypothesis, efficient thermoregulation requires different strategies in different thermal environments. In a habitat with predictable temperature changes, animals are less exposed to suboptimal temperature ranges and selection will, therefore, be stronger on the maximum oxidative damage at optimal body temperature. Contrarily, in a habitat with rather stochastic thermal shifts, individuals are often constricted by suboptimal thermal conditions, and oxidative damage can be limiting on a wide temperature range. We used Iberolacerta cyreni and Psammodromus algirus inhabiting stochastic and predictable thermal environments respectively. We examined two aspects of oxidative stress: the level of reactive oxygen metabolites at the preferred temperature (maximal ROM) and the temperature range in which animals produce at least 80% of the maximum level of reactive oxygen metabolites (effective ROM range). In I. cyreni, we found that duller coloration was related to a wider effective ROM range, while expression of coloration in P. algirus was negatively correlated with the maximal ROM. Our results suggest that different thermal constraints affect different aspects of oxidative damage which can indicate individual quality and are, therefore, represented in sexual ornaments.
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Affiliation(s)
- Boglárka Mészáros
- Behavioural Ecology Group, Department of Systematic Zoology and Ecology, ELTE Eötvös Loránd University, Pázmány Péter sétány 1/C, Budapest, 1117, Hungary.
| | - Lilla Jordán
- Behavioural Ecology Group, Department of Systematic Zoology and Ecology, ELTE Eötvös Loránd University, Pázmány Péter sétány 1/C, Budapest, 1117, Hungary
| | - Katalin Bajer
- Behavioural Ecology Group, Department of Systematic Zoology and Ecology, ELTE Eötvös Loránd University, Pázmány Péter sétány 1/C, Budapest, 1117, Hungary
| | - José Martín
- Departamento de Ecología Evolutiva, Museo Nacional de Ciencias Naturales, CSIC, José Gutiérrez Abascal 2, 28006, Madrid, Spain
| | - János Török
- Behavioural Ecology Group, Department of Systematic Zoology and Ecology, ELTE Eötvös Loránd University, Pázmány Péter sétány 1/C, Budapest, 1117, Hungary.,Ecology Research Group of the Hungarian Academy of Sciences, Pázmány Péter sétány 1/C, Budapest, H-1117, Hungary
| | - Orsolya Molnár
- Behavioural Ecology Group, Department of Systematic Zoology and Ecology, ELTE Eötvös Loránd University, Pázmány Péter sétány 1/C, Budapest, 1117, Hungary
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7
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Bogusławska-Wąs E, Dłubała A, Laskowska M. The role of Rhodotorula mucilaginosa in selected biological process of wild fish. FISH PHYSIOLOGY AND BIOCHEMISTRY 2019; 45:511-521. [PMID: 30519984 PMCID: PMC6500518 DOI: 10.1007/s10695-018-0591-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2018] [Accepted: 11/22/2018] [Indexed: 05/08/2023]
Abstract
Defense mechanisms of fish are investigated in many aspects. One of the most interesting systems is that based on non-specific immune factors whose mechanisms of biocontrol have evolved in complex processes of microbiological co-existence. The wild fish devoid of probiotic stimulation have developed their own system to control the biosynthesis of immunostimulating compounds based on commensal microflora. Results of this study demonstrated the gastrointestinal tract (GI) of wild fish (Abramis brama, Rutilus rutilus, Perca fluviatilis) was colonized by permanently residing strains of Rhodotorula mucilaginosa. The genetic profile of the tested strains (PCR-random amplification of polymorphic DNA) indicated their affinity only to the GI of the analyzed fish. The capability for biosynthesis of β-carotene, torulene, torularhodin, and exopolysaccharides (EPS) under conditions of fish gastrointestinal tract was found to be a strain-specific trait. Rhodotorula spp. interactions with fish should be considered as a mechanism of symbiotic relations based on the stimulation of non-specific mechanisms of fish immunoprotection and antioxidative properties of yeast.
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Affiliation(s)
- Elżbieta Bogusławska-Wąs
- Department of Applied Microbiology and Biotechnology, Faculty of Food Science and Fisheries, West Pomeranian University of Technology, Papieza Pawla VI 3, 71-450, Szczecin, Poland.
| | - Alicja Dłubała
- Department of Applied Microbiology and Biotechnology, Faculty of Food Science and Fisheries, West Pomeranian University of Technology, Papieza Pawla VI 3, 71-450, Szczecin, Poland
| | - Maria Laskowska
- Department of Applied Microbiology and Biotechnology, Faculty of Food Science and Fisheries, West Pomeranian University of Technology, Papieza Pawla VI 3, 71-450, Szczecin, Poland
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8
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Mohr AE, Girard M, Rowe M, McGraw KJ, Sweazea KL. Varied effects of dietary carotenoid supplementation on oxidative damage in tissues of two waterfowl species. Comp Biochem Physiol B Biochem Mol Biol 2019; 231:67-74. [PMID: 30794961 DOI: 10.1016/j.cbpb.2019.02.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2018] [Revised: 02/11/2019] [Accepted: 02/11/2019] [Indexed: 12/26/2022]
Abstract
Carotenoids are regarded as a cornerstone of avian vitality and coloration. Currently, the antioxidant potential of dietary carotenoids is debated for birds. Although some studies support a protective role, others report either no effect or pro-oxidant effects. However, the majority of research on this topic has not analyzed the oxidative status of a series of tissues in animals nor considered a range of carotenoid dosages. We investigated the effects of three levels of carotenoid supplementation on plasma, liver, adipose, heart and breast muscle oxidative damage in two congeneric species of waterfowl that exhibit marked differences in carotenoid coloration. After a 6-week depletion period, captive adult northern pintail (Anas acuta) and mallard (A. platyrhynchos) ducks of both sexes were fed either a carotenoid-depleted diet (<3 μg/g xanthophylls, lutein and zeaxanthin), a carotenoid-supplemented diet (50 μg/g) within physiological range, or a carotenoid-rich diet (100 μg/g) within pharmacological range for 22 to 32 weeks. We hypothesized that these dosages of dietary carotenoids would differentially affect oxidative damage between species and sexes and among the tissues examined. We found that dietary xanthophyll supplementation had no significant effect on tissue pro-oxidation in males and females from both species. Moreover, sex or species differences in oxidative stress were only observed in two tissues (plasma and heart). Significant correlations in the levels of oxidative damage were not observed among the tissues examined. In conclusion, the current study does not support a consistent antioxidant role for dietary carotenoids in the tissues of these two waterfowl species. Instead, our results align with the notion that carotenoids play complex, tissue- and species-specific roles in oxidative status in birds.
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Affiliation(s)
- Alex E Mohr
- College of Health Solutions, Arizona State University, Phoenix, AZ, United States of America
| | - Marc Girard
- School of Life Sciences, Arizona State University, Tempe, AZ, United States of America
| | - Melissah Rowe
- School of Life Sciences, Arizona State University, Tempe, AZ, United States of America; Natural History Museum, University of Oslo, 0562 Oslo, Norway; Centre for Ecological and Evolutionary Synthesis, Department of Biosciences, University of Oslo, 0316 Oslo, Norway
| | - Kevin J McGraw
- School of Life Sciences, Arizona State University, Tempe, AZ, United States of America
| | - Karen L Sweazea
- College of Health Solutions, Arizona State University, Phoenix, AZ, United States of America; School of Life Sciences, Arizona State University, Tempe, AZ, United States of America.
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9
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Plummer KE, Bearhop S, Leech DI, Chamberlain DE, Blount JD. Effects of winter food provisioning on the phenotypes of breeding blue tits. Ecol Evol 2018; 8:5059-5068. [PMID: 29876081 PMCID: PMC5980576 DOI: 10.1002/ece3.4048] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2017] [Revised: 02/21/2018] [Accepted: 02/23/2018] [Indexed: 01/06/2023] Open
Abstract
Throughout the Western World, huge numbers of people regularly supply food for wild birds. However, evidence of negative impacts of winter feeding on future reproduction has highlighted a need to improve understanding of the underlying mechanisms shaping avian responses to supplementary food. Here, we test the possibility that carry-over effects are mediated via their impact on the phenotypes of breeding birds, either by influencing the phenotypic structure of populations through changes in winter survival and/or by more direct effects on the condition of breeding birds. Using a landscape-scale 3-year study of blue tits (Cyanistes caeruleus), we demonstrate the importance of nutritional composition of supplementary food in determining carry-over effect outcomes. We show that breeding populations which had access to vitamin E-rich foods during the previous winter were comprised of individuals with reduced feather carotenoid concentrations, indicative of lower pre-feeding phenotypic condition, compared to fat-fed and unfed populations. This suggests that supplementary feeding in winter can result in altered population phenotypic structure at the time of breeding, perhaps by enhancing survival and recruitment of lower quality individuals. However, supplementation of a fat-rich diet during winter was detrimental to the oxidative state of breeding birds, with these phenotypic differences ultimately found to impact upon reproductive success. Our findings demonstrate the complex nature by which supplementary feeding can influence wild bird populations.
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Affiliation(s)
- Kate E. Plummer
- Centre for Ecology and ConservationCollege of Life & Environmental SciencesUniversity of ExeterPenrynCornwallUK
- British Trust for OrnithologyThe NunneryThetfordNorfolkUK
| | - Stuart Bearhop
- Centre for Ecology and ConservationCollege of Life & Environmental SciencesUniversity of ExeterPenrynCornwallUK
| | - David I. Leech
- British Trust for OrnithologyThe NunneryThetfordNorfolkUK
| | - Dan E. Chamberlain
- Dipartimento di Scienze della Vita e Biologià dei SistemiUniversità degli Studi di TorinoTurinItaly
| | - Jonathan D. Blount
- Centre for Ecology and ConservationCollege of Life & Environmental SciencesUniversity of ExeterPenrynCornwallUK
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10
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Maronde L, Losdat S, Richner H. Do parasites and antioxidant availability affect begging behaviour, growth rate and resistance to oxidative stress? J Evol Biol 2018; 31:904-913. [DOI: 10.1111/jeb.13274] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2017] [Revised: 03/12/2018] [Accepted: 03/18/2018] [Indexed: 02/04/2023]
Affiliation(s)
- Lea Maronde
- Institute of Ecology and Evolution; University of Bern; Bern Switzerland
| | - Sylvain Losdat
- Institute of Ecology and Evolution; University of Bern; Bern Switzerland
- Institute of Biology; University of Neuchâtel; Neuchâtel Switzerland
| | - Heinz Richner
- Institute of Ecology and Evolution; University of Bern; Bern Switzerland
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11
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Norte AC, Costantini D, Araújo PM, Eens M, Ramos JA, Heylen D. Experimental infection by microparasites affects the oxidative balance in their avian reservoir host the blackbird Turdus merula. Ticks Tick Borne Dis 2018; 9:720-729. [PMID: 29478884 DOI: 10.1016/j.ttbdis.2018.02.009] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2017] [Revised: 02/08/2018] [Accepted: 02/08/2018] [Indexed: 11/18/2022]
Abstract
By draining resources, microparasites can negatively affect the host fitness, which in turn can result in reduced transmission when virulence leads to reductions in host population size. Therefore, for a microparasite to persist in nature, the level of harm it can do to its host is expected to be limited. We tested this hypothesis for tick-borne Borrelia burgdorferi sensu lato (s.l.) infections in the blackbird Turdus merula, one of the most important avian reservoir hosts in Europe. Experimental and observational data were combined to examine the physiological effects caused by B. burgdorferi s.l. infection in blackbirds. Pathogen-free blackbirds were exposed to B. burgdorferi s.l.-infected Ixodes ricinus and I. frontalis nymphs, and compared with a control group (exposed to naïve laboratory-derived I. ricinus nymphs). Their physiological status was evaluated before and after infection with B. burgdorferi s.l., through a set of immunological (erythrocyte sedimentation rate, haptoglobin, white blood cell count and heterophil/lymphocyte ratio), oxidative stress (glutathione peroxidase activity, protein carbonyls and nitric oxide) and general body condition variables (body condition, glucose and haematocrit). Infected males showed higher levels of oxidative damage to proteins (increased levels of protein carbonyls), decreased glutathione peroxidase activity and increased body mass. Infected females had higher levels of glutathione peroxidase activity after infection by B. burgdorferi s.l. than the control group. No significant effects of B. burgdorferi s.l. infection were detected on erythrocyte sedimentation rate, haptoglobin, heterophil/lymphocyte ratio, nitric oxide, glucose and haematocrit. The first experimental study on the effects of B. burgdorferi s.l. on its avian reservoir hosts shows that these bacteria may inflict non-negligible physiological costs. We speculate that during energetically demanding periods, these physiological costs may reduce host fitness and affect pathogen transmission.
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Affiliation(s)
- Ana Cláudia Norte
- Marine and Environmental Sciences Centre, Department of Life Sciences, University of Coimbra, Coimbra, Portugal; Center for Vector and Infectious Diseases Research, National Institute of Health Doutor Ricardo Jorge, Lisbon, Portugal.
| | - David Costantini
- Behavioural Ecology and Ecophysiology Group, Department of Biology, University of Antwerp, Universiteitsplein 1, 2610, Wilrijk, Belgium; UMR 7221 CNRS/MNHN, Muséum National d'Histoire Naturelle, ComEU Sorbonnes Universités, 7 rue Cuvier, 75005, Paris, France
| | - Pedro Miguel Araújo
- Marine and Environmental Sciences Centre, Department of Life Sciences, University of Coimbra, Coimbra, Portugal
| | - Marcel Eens
- Behavioural Ecology and Ecophysiology Group, Department of Biology, University of Antwerp, Universiteitsplein 1, 2610, Wilrijk, Belgium
| | - Jaime Albino Ramos
- Marine and Environmental Sciences Centre, Department of Life Sciences, University of Coimbra, Coimbra, Portugal
| | - Dieter Heylen
- Evolutionary Ecology Group, Department of Biology, University of Antwerp, Universiteitsplein 1, 2610 Wilrijk, Belgium
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12
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Mészáros B, Herczeg G, Bajer K, Török J, Molnár O. Effects of energy and thermoregulation time on physiological state and sexual signal in a lizard. JOURNAL OF EXPERIMENTAL ZOOLOGY PART 2018; 327:570-578. [PMID: 29377549 DOI: 10.1002/jez.2143] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/15/2017] [Revised: 12/26/2017] [Accepted: 01/06/2018] [Indexed: 12/12/2022]
Abstract
Theory of sexual selection states that males often develop showy signals, which reduce their survival but increase their reproductive success. During mate choice, these conspicuous signals can be honest indicators of individual quality conveying information about the signaler's physiological state. Sexually selected signals are influenced by many environmental factors; however, whether signals and physiological state are affected together is rarely studied. The ultraviolet-blue throat color of male Lacerta viridis is an intra- and intersexually selected signal connected to blood parasite infection and influenced by environmental factors. The aim of this study was to experimentally investigate how ecologically relevant environmental factors affect color signal intensity and key physiological traits parallel. During the mating season, we exposed 40 adult male lizards infected with blood parasites to food and basking time treatments in a full factorial design. We measured color, amount of reactive oxygen metabolites (ROMs), hematocrit, immunocompetence, and blood parasite intensity before and after treatments. High basking time resulted in elevated immunocompetence coupled with increased ROMs. The high food treatment increased nuptial color brightness, but also increased ROMs and decreased immunocompetence. In summary, our study provides experimental evidence about environmentally induced parallel changes in an honest sexual signal and several quality-indicator physiological traits. We showed that available energy and time for high metabolism have independent and sometimes opposite effects on individual state.
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Affiliation(s)
- Boglárka Mészáros
- Behavioural Ecology Group, Department of Systematic Zoology and Ecology, Eötvös Loránd University, Budapest, Hungary
| | - Gábor Herczeg
- Behavioural Ecology Group, Department of Systematic Zoology and Ecology, Eötvös Loránd University, Budapest, Hungary
| | - Katalin Bajer
- Behavioural Ecology Group, Department of Systematic Zoology and Ecology, Eötvös Loránd University, Budapest, Hungary.,Laboratório de Biogeografia e Macroecologia, Universidade Federal do Rio Grande do Norte Centro de Biociências, Departamento de Botânica, Ecologia e Zoologia, Campus Universitário, Lagoa Nova, Natal-RN, Brazil
| | - János Török
- Behavioural Ecology Group, Department of Systematic Zoology and Ecology, Eötvös Loránd University, Budapest, Hungary
| | - Orsolya Molnár
- Behavioural Ecology Group, Department of Systematic Zoology and Ecology, Eötvös Loránd University, Budapest, Hungary.,Laboratório de Biogeografia e Macroecologia, Universidade Federal do Rio Grande do Norte Centro de Biociências, Departamento de Botânica, Ecologia e Zoologia, Campus Universitário, Lagoa Nova, Natal-RN, Brazil
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13
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Body mass and immune function, but not bill coloration, predict dominance in female mallards. Behav Processes 2016; 131:59-67. [PMID: 27561967 DOI: 10.1016/j.beproc.2016.08.010] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2016] [Revised: 08/12/2016] [Accepted: 08/21/2016] [Indexed: 12/13/2022]
Abstract
Competition over indivisible resources is common and often costly. Therefore, selection should favor strategies, including efficient communication, that minimize unnecessary costs associated with such competition. For example, signaling enables competitors to avoid engaging in costly asymmetrical contests. Recently, bill coloration has been identified as an information-rich signal used by some birds to mediate aggressive interactions and we evaluated this possibility in female mallards Anas platyrhynchos. Specifically, we conducted two rounds of competitive interactions among groups of unfamiliar adult female ducks. By recording all aggressive behaviors exhibited by each individual, as well as the identity of attack recipients, we were able to assign dominance scores and evaluate links between numerous physiological, morphological, and experimental variables that we predicted would influence contest outcome and dominance. Contrary to our predictions, dominance was not linked to any aspect of bill coloration, access to dietary carotenoids during development, two of three measures of immune function, or ovarian follicle maturation. Instead, heavier birds were more dominant, as were those with reduced immune system responses to an experimentally administered external immunostimulant, phytohemagglutinin. These results suggest that visual signals are less useful during the establishment of dominance hierarchies within multi-individual scramble competitions, and that immune function is correlated with contest strategies in competitions for access to limited resources.
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14
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Coloration reflects skin pterin concentration in a red-tailed lizard. Comp Biochem Physiol B Biochem Mol Biol 2016; 193:17-24. [DOI: 10.1016/j.cbpb.2015.11.011] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2015] [Revised: 11/04/2015] [Accepted: 11/05/2015] [Indexed: 12/23/2022]
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15
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Montoya B, Valverde M, Rojas E, Torres R. Oxidative stress during courtship affects male and female reproductive effort differentially in a wild bird with biparental care. J Exp Biol 2016; 219:3915-3926. [DOI: 10.1242/jeb.141325] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2016] [Accepted: 10/03/2016] [Indexed: 12/13/2022]
Abstract
Oxidative stress has been suggested as one of the physiological mechanisms modulating reproductive effort, including investment in mate choice. Here, we evaluated whether oxidative stress influences breeding decisions by acting as a cost of or constraint on reproduction in the brown booby (Sula leucogaster), a long-lived seabird with prolonged biparental care. We found that during courtship, levels of lipid peroxidation (LP) of males and females were positively associated with gular skin color, a trait presumably used in mate choice, while levels of reactive oxygen species (ROS) were higher as laying approached and in early breeding pairs. Evidence of a constraining effect of oxidative stress for females was suggested by the fact that females with higher ROS during courtship laid smaller first eggs and had chicks with lower rates of body mass gain, and higher female LP was associated with lower offspring attendance time. No evidence of an oxidative cost of parental effort was found; from courtship to parental care male and female' ROS decreased, and changes in LP levels were non-significant. Finally, using a cross-fostering experiment we found that offspring ROS was unrelated to rearing and genetic parents' ROS. Interestingly, offspring LP was positively associated with the LP during courtship of both the rearing parents and the genetic father, suggesting that offspring LP might have both a genetic and an environmental component. Hence, in the brown booby oxidative stress may be a cost of investment in reproductive traits before egg laying and constrain females' investment in eggs and parental care.
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Affiliation(s)
- Bibiana Montoya
- Laboratorio de Conducta Animal, Departamento de Ecología Evolutiva, Instituto de Ecología, Universidad Nacional Autónoma de México
| | - Mahara Valverde
- Departamento de Medicina Genómica y Toxicología Ambiental, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México
| | - Emilio Rojas
- Departamento de Medicina Genómica y Toxicología Ambiental, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México
| | - Roxana Torres
- Laboratorio de Conducta Animal, Departamento de Ecología Evolutiva, Instituto de Ecología, Universidad Nacional Autónoma de México
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16
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Viblanc VA, Dobson FS, Stier A, Schull Q, Saraux C, Gineste B, Pardonnet S, Kauffmann M, Robin JP, Bize P. Mutually honest? Physiological ‘qualities’ signalled by colour ornaments in monomorphic king penguins. Biol J Linn Soc Lond 2015. [DOI: 10.1111/bij.12729] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Vincent A. Viblanc
- Department of Ecology and Evolution; University of Lausanne; Lausanne CH-1015 Switzerland
- Centre d'Ecologie Fonctionnelle et Evolutive; Equipe Ecologie Comportementale; UMR 5175 CNRS; 1919 route de Mende Montpellier 34293 France
| | - F. Stephen Dobson
- Centre d'Ecologie Fonctionnelle et Evolutive; Equipe Ecologie Comportementale; UMR 5175 CNRS; 1919 route de Mende Montpellier 34293 France
- Department of Biological Sciences; Auburn University; 311 Funchess Hall Auburn AL 36849 USA
| | - Antoine Stier
- Université de Strasbourg; IPHC; 23 rue Becquerel Strasbourg 67087 France
- CNRS; UMR 7178; Strasbourg 67087 France
| | - Quentin Schull
- Université de Strasbourg; IPHC; 23 rue Becquerel Strasbourg 67087 France
- CNRS; UMR 7178; Strasbourg 67087 France
| | - Claire Saraux
- IFREMER; UMR MARBEC; Avenue Jean Monnet BP 171 Sète Cedex 34203 France
| | - Benoit Gineste
- Université de Strasbourg; IPHC; 23 rue Becquerel Strasbourg 67087 France
- CNRS; UMR 7178; Strasbourg 67087 France
| | - Sylvia Pardonnet
- Université de Strasbourg; IPHC; 23 rue Becquerel Strasbourg 67087 France
- CNRS; UMR 7178; Strasbourg 67087 France
| | - Marion Kauffmann
- Université de Strasbourg; IPHC; 23 rue Becquerel Strasbourg 67087 France
- CNRS; UMR 7178; Strasbourg 67087 France
| | - Jean-Patrice Robin
- Université de Strasbourg; IPHC; 23 rue Becquerel Strasbourg 67087 France
- CNRS; UMR 7178; Strasbourg 67087 France
| | - Pierre Bize
- Department of Ecology and Evolution; University of Lausanne; Lausanne CH-1015 Switzerland
- Institute of Biological and Environmental Sciences; University of Aberdeen; Scotland UK
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17
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Wenzel MA, Douglas A, James MC, Redpath SM, Piertney SB. The role of parasite-driven selection in shaping landscape genomic structure in red grouse (Lagopus lagopus scotica). Mol Ecol 2015; 25:324-41. [PMID: 26578090 DOI: 10.1111/mec.13473] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2015] [Revised: 11/09/2015] [Accepted: 11/10/2015] [Indexed: 12/25/2022]
Abstract
Landscape genomics promises to provide novel insights into how neutral and adaptive processes shape genome-wide variation within and among populations. However, there has been little emphasis on examining whether individual-based phenotype-genotype relationships derived from approaches such as genome-wide association (GWAS) manifest themselves as a population-level signature of selection in a landscape context. The two may prove irreconcilable as individual-level patterns become diluted by high levels of gene flow and complex phenotypic or environmental heterogeneity. We illustrate this issue with a case study that examines the role of the highly prevalent gastrointestinal nematode Trichostrongylus tenuis in shaping genomic signatures of selection in red grouse (Lagopus lagopus scotica). Individual-level GWAS involving 384 SNPs has previously identified five SNPs that explain variation in T. tenuis burden. Here, we examine whether these same SNPs display population-level relationships between T. tenuis burden and genetic structure across a small-scale landscape of 21 sites with heterogeneous parasite pressure. Moreover, we identify adaptive SNPs showing signatures of directional selection using F(ST) outlier analysis and relate population- and individual-level patterns of multilocus neutral and adaptive genetic structure to T. tenuis burden. The five candidate SNPs for parasite-driven selection were neither associated with T. tenuis burden on a population level, nor under directional selection. Similarly, there was no evidence of parasite-driven selection in SNPs identified as candidates for directional selection. We discuss these results in the context of red grouse ecology and highlight the broader consequences for the utility of landscape genomics approaches for identifying signatures of selection.
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Affiliation(s)
- Marius A Wenzel
- Institute of Biological and Environmental Sciences, University of Aberdeen, Tillydrone Avenue, Aberdeen, AB24 2TZ, UK
| | - Alex Douglas
- Institute of Biological and Environmental Sciences, University of Aberdeen, Tillydrone Avenue, Aberdeen, AB24 2TZ, UK
| | - Marianne C James
- Institute of Biological and Environmental Sciences, University of Aberdeen, Tillydrone Avenue, Aberdeen, AB24 2TZ, UK
| | - Steve M Redpath
- Institute of Biological and Environmental Sciences, University of Aberdeen, Tillydrone Avenue, Aberdeen, AB24 2TZ, UK
| | - Stuart B Piertney
- Institute of Biological and Environmental Sciences, University of Aberdeen, Tillydrone Avenue, Aberdeen, AB24 2TZ, UK
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18
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Koch RE, Wilson AE, Hill GE. The Importance of Carotenoid Dose in Supplementation Studies with Songbirds. Physiol Biochem Zool 2015; 89:61-71. [PMID: 27082525 DOI: 10.1086/684485] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Carotenoid coloration is the one of the most frequently studied ornamental traits in animals. Many studies of carotenoid coloration test the associations between carotenoid coloration and measures of performance, such as immunocompetence and oxidative state, proceeding from the premise that carotenoids are limited resources. Such studies commonly involve supplementing the diets of captive birds with carotenoids. In many cases, however, the amount of carotenoid administered is poorly justified, and even supposedly carotenoid-limited diets may saturate birds' systems. To quantify the relationships among the amount of carotenoids administered in experiments, levels of circulating carotenoids, and quantities of carotenoids deposited into colored ornaments, we performed a meta-analysis of 15 published studies that supplemented carotenoids to one of seven songbird species. We used allometric scaling equations to estimate the per-gram carotenoid consumption of each study's subjects, and we used meta-regression to evaluate the effects of this carotenoid dose on differences in coloration and plasma carotenoid levels between supplemented and control groups of birds. After accounting for supplementation duration and species, we observed a significant positive correlation between carotenoid intake and response of plasma carotenoid level to supplementation. The presence of supplemental carotenoids also tended to increase the expression of ornamental coloration, but the magnitude of the carotenoid dose did not significantly affect how strongly coloration changed with supplementation. Further, coloration effect sizes had no significant relationship with plasma carotenoid effect sizes. We also found significant heterogeneity in responses among studies and species, and the parameters used to measure color significantly affected response to supplementation. Our results emphasize the importance of performing dosage trials to determine what supplementation levels provide limited versus surplus carotenoids and of measuring the natural level of carotenoid intake by the study species to validate the appropriateness of supplementation levels for a particular study species and experimental design.
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19
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Wenzel MA, Piertney SB. Digging for gold nuggets: uncovering novel candidate genes for variation in gastrointestinal nematode burden in a wild bird species. J Evol Biol 2015; 28:807-25. [DOI: 10.1111/jeb.12614] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2014] [Revised: 02/13/2015] [Accepted: 02/16/2015] [Indexed: 12/16/2022]
Affiliation(s)
- M. A. Wenzel
- Institute of Biological and Environmental Sciences; University of Aberdeen; Aberdeen UK
| | - S. B. Piertney
- Institute of Biological and Environmental Sciences; University of Aberdeen; Aberdeen UK
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20
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Vergara P, Fargallo JA, Martínez-Padilla J. Genetic basis and fitness correlates of dynamic carotenoid-based ornamental coloration in male and female common kestrels Falco tinnunculus. J Evol Biol 2014; 28:146-54. [DOI: 10.1111/jeb.12553] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2014] [Accepted: 11/12/2014] [Indexed: 11/28/2022]
Affiliation(s)
- P. Vergara
- Departamento de Ecología Evolutiva; Museo Nacional de Ciencias Naturales-CSIC; Madrid Spain
| | - J. A. Fargallo
- Departamento de Ecología Evolutiva; Museo Nacional de Ciencias Naturales-CSIC; Madrid Spain
| | - J. Martínez-Padilla
- Departamento de Ecología Evolutiva; Museo Nacional de Ciencias Naturales-CSIC; Madrid Spain
- Department of Ethology and Biodiversity Conservation; Estación Biológica de Doñana - CSIC; Sevilla Spain
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21
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Wenzel MA, Piertney SB. Fine-scale population epigenetic structure in relation to gastrointestinal parasite load in red grouse (Lagopus lagopus scotica). Mol Ecol 2014; 23:4256-73. [PMID: 24943398 PMCID: PMC4282444 DOI: 10.1111/mec.12833] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2014] [Revised: 06/10/2014] [Accepted: 06/11/2014] [Indexed: 12/27/2022]
Abstract
Epigenetic modification of cytosine methylation states can be elicited by environmental stresses and may be a key process affecting phenotypic plasticity and adaptation. Parasites are potent stressors with profound physiological and ecological effects on their host, but there is little understanding in how parasites may influence host methylation states. Here, we estimate epigenetic diversity and differentiation among 21 populations of red grouse (Lagopus lagopus scotica) in north-east Scotland and test for association of gastrointestinal parasite load (caecal nematode Trichostrongylus tenuis) with hepatic genome-wide and locus-specific methylation states. Following methylation-sensitive AFLP (MSAP), 129 bands, representing 73 methylation-susceptible and 56 nonmethylated epiloci, were scored across 234 individuals. The populations differed significantly in genome-wide methylation levels and were also significantly epigenetically (FSC = 0.0227; P < 0.001) and genetically (FSC = 0.0058; P < 0.001) differentiated. Parasite load was not associated with either genome-wide methylation levels or epigenetic differentiation. Instead, we found eight disproportionately differentiated epilocus-specific methylation states (FST outliers) using bayescan software and significant positive and negative association of 35 methylation states with parasite load from bespoke generalized estimating equations (GEE), simple logistic regression (sam) and Bayesian environmental analysis (bayenv2). Following Sanger sequencing, genome mapping and geneontology (go) annotation, some of these epiloci were linked to genes involved in regulation of cell cycle, signalling, metabolism, immune system and notably rRNA methylation, histone acetylation and small RNAs. These findings demonstrate an epigenetic signature of parasite load in populations of a wild bird and suggest intriguing physiological effects of parasite-associated cytosine methylation.
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Affiliation(s)
- Marius A Wenzel
- Institute of Biological and Environmental Sciences, University of Aberdeen, Zoology Building, Tillydrone Avenue, Aberdeen, AB24 2TZ, UK
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22
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Martínez-Padilla J, Pérez-Rodríguez L, Mougeot F, Ludwig SC, Redpath SM. Experimentally elevated levels of testosterone at independence reduce fitness in a territorial bird. Ecology 2014; 95:1033-44. [DOI: 10.1890/12-1905.1] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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23
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Hanssen SA, Bustnes JO, Schnug L, Bourgeon S, Johnsen TV, Ballesteros M, Sonne C, Herzke D, Eulaers I, Jaspers VLB, Covaci A, Eens M, Halley DJ, Moum T, Ims RA, Erikstad KE. Antiparasite treatments reduce humoral immunity and impact oxidative status in raptor nestlings. Ecol Evol 2013; 3:5157-66. [PMID: 24455145 PMCID: PMC3892325 DOI: 10.1002/ece3.891] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2013] [Revised: 10/23/2013] [Accepted: 10/25/2013] [Indexed: 12/02/2022] Open
Abstract
Parasites are natural stressors that may have multiple negative effects on their host as they usurp energy and nutrients and may lead to costly immune responses that may cause oxidative stress. At early stages, animals may be more sensitive to infectious organisms because of their rapid growth and partly immature immune system. The objective of this study was to explore effects of parasites by treating chicks of two raptor species (northern goshawk Accipiter gentilis and white-tailed sea eagle Haliaeetus albicilla) against both endoparasites (internal parasites) and ectoparasites (external parasites). Nests were either treated against ectoparasites by spraying with pyrethrin or left unsprayed as control nests. Within each nest, chicks were randomly orally treated with either an antihelminthic medication (fenbendazole) or sterile water as control treatment. We investigated treatment effects on plasma (1) total antioxidant capacity TAC (an index of nonenzymatic circulating antioxidant defenses), (2) total oxidant status TOS (a measure of plasmatic oxidants), and (3) immunoglobulin levels (a measure of humoral immune function). Treatment against ectoparasites led to a reduction in circulating immunoglobulin plasma levels in male chicks. TOS was higher when not receiving any parasite reduction treatment and when receiving both endo- and ectoparasitic reduction treatment compared with receiving only one treatment. TAC was higher in all treatment groups, when compared to controls. Despite the relatively low sample size, this experimental study suggests complex but similar relationships between treatment groups and oxidative status and immunoglobulin levels in two raptor species.
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Affiliation(s)
- Sveinn Are Hanssen
- Norwegian Institute for Nature Research, Unit for Arctic Ecology, Fram Centre N-9296, Tromsø, Norway
| | - Jan Ove Bustnes
- Norwegian Institute for Nature Research, Unit for Arctic Ecology, Fram Centre N-9296, Tromsø, Norway
| | - Lisbeth Schnug
- Norwegian Institute for Agricultural and Environmental Research, Soil, Water and Environment Division Fr. A. Dahlsvei 20, N-1432, Ås, Norway
| | - Sophie Bourgeon
- Norwegian Institute for Nature Research, Unit for Arctic Ecology, Fram Centre N-9296, Tromsø, Norway
| | - Trond Vidar Johnsen
- Norwegian Institute for Nature Research, Unit for Arctic Ecology, Fram Centre N-9296, Tromsø, Norway
| | - Manuel Ballesteros
- Norwegian Institute for Nature Research, Unit for Arctic Ecology, Fram Centre N-9296, Tromsø, Norway
| | - Christian Sonne
- Faculty of Science and Technology, Department of Bioscience, Aarhus University Frederiksborgvej 399, PO Box 358, DK-4000, Roskilde, Denmark
| | - Dorte Herzke
- Norwegian Institute for Air Research, Fram Centre N-9296, Tromsø, Norway
| | - Igor Eulaers
- Ethology Research Group, Department of Biology and Toxicological Centre, University of Antwerp Universiteitsplein 1, B-2610, Wilrijk, Belgium
| | - Veerle L B Jaspers
- Ethology Research Group, Department of Biology and Toxicological Centre, University of Antwerp Universiteitsplein 1, B-2610, Wilrijk, Belgium ; Department of Biology, Norwegian University of Science and Technology (NTNU) 7491, Trondheim, Norway
| | - Adrian Covaci
- Ethology Research Group, Department of Biology and Toxicological Centre, University of Antwerp Universiteitsplein 1, B-2610, Wilrijk, Belgium
| | - Marcel Eens
- Ethology Research Group, Department of Biology and Toxicological Centre, University of Antwerp Universiteitsplein 1, B-2610, Wilrijk, Belgium
| | - Duncan J Halley
- Department of Terrestrial Ecology, Norwegian Institute for Nature Research Tungasletta 2, N-7485, Trondheim, Norway
| | - Truls Moum
- Faculty of Biosciences and Aquaculture, Marine Genomics group, University of Nordland N-8049, Bodø, Norway
| | - Rolf Anker Ims
- Norwegian Institute for Nature Research, Unit for Arctic Ecology, Fram Centre N-9296, Tromsø, Norway
| | - Kjell Einar Erikstad
- Norwegian Institute for Nature Research, Unit for Arctic Ecology, Fram Centre N-9296, Tromsø, Norway
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McGraw KJ, Giraudeau M, Hill GE, Toomey MB, Staley M. Ketocarotenoid circulation, but not retinal carotenoid accumulation, is linked to eye disease status in a wild songbird. Arch Biochem Biophys 2013; 539:156-62. [DOI: 10.1016/j.abb.2013.09.015] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2013] [Revised: 09/11/2013] [Accepted: 09/19/2013] [Indexed: 11/30/2022]
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Brown AC, McGraw KJ, Clotfelter ED. Dietary Carotenoids Increase Yellow Nonpigment Coloration of Female Convict Cichlids (Amantitlania nigrofasciata). Physiol Biochem Zool 2013; 86:312-22. [DOI: 10.1086/670734] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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26
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Flores EE, Stevens M, Moore AJ, Blount JD. Diet, development and the optimization of warning signals in post‐metamorphic green and black poison frogs. Funct Ecol 2013. [DOI: 10.1111/1365-2435.12084] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Eric E. Flores
- Centre for Ecology and Conservation College of Life & Environmental Sciences University of Exeter Cornwall Campus Penryn TR10 9EZ UK
| | - Martin Stevens
- Department of Zoology University of Cambridge Downing Street Cambridge CB2 3EJ UK
| | - Allen J. Moore
- Centre for Ecology and Conservation College of Life & Environmental Sciences University of Exeter Cornwall Campus Penryn TR10 9EZ UK
- Department of Genetics University of Georgia Athens GA 30602 USA
| | - Jonathan D. Blount
- Centre for Ecology and Conservation College of Life & Environmental Sciences University of Exeter Cornwall Campus Penryn TR10 9EZ UK
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27
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Butler MW, McGraw KJ. Immune function is related to adult carotenoid and bile pigment levels, but not dietary carotenoid access during development, in female mallard ducks. J Exp Biol 2013; 216:2632-40. [DOI: 10.1242/jeb.082982] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Summary
Immune function can be modulated by multiple physiological factors, including nutrition and reproductive state. Because these factors can vary throughout an individual’s lifetime due to environmental conditions (e.g. nutrition) or life-history stage (e.g. adult reproduction), we must carefully examine the degree to which developmental versus adult conditions shape performance of the immune system. We investigated how variation in dietary access to carotenoid pigments – a class of molecules with immunostimulatory properties that females deposit into egg yolks – during three different developmental time points affected adult immunological and reproductive traits in female mallard ducks (Anas platyrhynchos). In males and females of other avian species, carotenoid access during development affects carotenoid assimilation ability, adult sexual ornamentation, and immune function, while carotenoid access at adulthood can increase immune response and reproductive investment (e.g. egg-laying capacity, biliverdin deposition in eggshells). We failed to find effects of developmental carotenoid supplementation on adult immune function (phytohemagglutinin-induced cutaneous immune response, antibody production in response to the novel antigen keyhole limpet hemocyanin [KLH], or oxidative burst, assessed by change in circulating nitric oxide levels), carotenoid-pigmented beak coloration, ovarian development, circulating carotenoid levels, or concentration of bile pigments in the gall bladder. However, we did uncover positive relationships between circulating carotenoid levels at adulthood and KLH-specific antibody production, and a negative relationship between biliverdin concentration in bile and KLH-specific antibody production. These results are consistent with the view that adult physiological parameters better predict current immune function than do developmental conditions and highlight a possible, previously unstudied relationship between biliverdin and immune system performance.
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28
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Physiological costs enforce the honesty of lek display in the black grouse (Tetrao tetrix). Oecologia 2012; 172:983-93. [DOI: 10.1007/s00442-012-2548-9] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2012] [Accepted: 11/23/2012] [Indexed: 10/27/2022]
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29
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Whitehead RD, Perrett DI, Ozakinci G. Attractive Skin Coloration: Harnessing Sexual Selection to Improve Diet and Health. EVOLUTIONARY PSYCHOLOGY 2012. [DOI: 10.1177/147470491201000507] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
In this paper we review the mechanisms through which carotenoid coloration could provide a sexually selected cue to condition in species with elaborate color vision. Skin carotenoid pigmentation induced by fruit and vegetable consumption may provide a similar cue to health in humans (particularly light-skinned Asians and Caucasians). Evidence demonstrates that carotenoid-based skin coloration enhances apparent health, and that dietary change can perceptibly impact skin color within weeks. We find that the skin coloration associated with increased fruit and vegetable consumption benefits apparent health to a greater extent than melanin pigmentation. We argue that the benefits to appearance may motivate individuals to improve their diet and that this line of appearance research reveals a potentially powerful strategy for motivating a healthy lifestyle.
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Affiliation(s)
- Ross D. Whitehead
- School of Psychology, University of St Andrews, St Andrews, Scotland
| | - David I. Perrett
- School of Psychology, University of St Andrews, St Andrews, Scotland
| | - Gözde Ozakinci
- School of Medicine, University of St Andrews, St Andrews, Scotland
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30
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Wenzel MA, Webster LMI, Paterson S, Mougeot F, Martínez-Padilla J, Piertney SB. A transcriptomic investigation of handicap models in sexual selection. Behav Ecol Sociobiol 2012. [DOI: 10.1007/s00265-012-1442-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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31
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Vergara P, Redpath SM, Martínez-Padilla J, Mougeot F. Environmental conditions influence red grouse ornamentation at a population level. Biol J Linn Soc Lond 2012. [DOI: 10.1111/j.1095-8312.2012.01974.x] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Pablo Vergara
- School of Biological Sciences; University of Aberdeen; Tillydrone Av.; Aberdeen; AB24 2TZ; UK
| | - Stephen M. Redpath
- School of Biological Sciences; University of Aberdeen & The James Hutton Institute; Aberdeen Centre for Environmental Sustainability (ACES); Tillydrone Av.; Aberdeen; AB24 2TZ; UK
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32
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Simons MJP, Cohen AA, Verhulst S. What does carotenoid-dependent coloration tell? Plasma carotenoid level signals immunocompetence and oxidative stress state in birds-A meta-analysis. PLoS One 2012; 7:e43088. [PMID: 22905205 PMCID: PMC3419220 DOI: 10.1371/journal.pone.0043088] [Citation(s) in RCA: 132] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2012] [Accepted: 07/16/2012] [Indexed: 11/24/2022] Open
Abstract
Mechanisms maintaining honesty of sexual signals are far from resolved, limiting our understanding of sexual selection and potential important parts of physiology. Carotenoid pigmented visual signals are among the most extensively studied sexual displays, but evidence regarding hypotheses on how carotenoids ensure signal honesty is mixed. Using a phylogenetically controlled meta-analysis of 357 effect sizes across 88 different species of birds, we tested two prominent hypotheses in the field: that carotenoid-dependent coloration signals i) immunocompetence and/or ii) oxidative stress state. Separate meta-analyses were performed for the relationships of trait coloration and circulating carotenoid level with different measures of immunocompetence and oxidative stress state. For immunocompetence we find that carotenoid levels (r = 0.20) and trait color intensity (r = 0.17) are significantly positively related to PHA response. Additionally we find that carotenoids are significantly positively related to antioxidant capacity (r = 0.10), but not significantly related to oxidative damage (r = -0.02). Thus our analyses provide support for both hypotheses, in that at least for some aspects of immunity and oxidative stress state the predicted correlations were found. Furthermore, we tested for differences in effect size between experimental and observational studies; a larger effect in observational studies would indicate that co-variation might not be causal. However, we detected no significant difference, suggesting that the relationships we found are causal. The overall effect sizes we report are modest and we discuss potential factors contributing to this, including differences between species. We suggest complementary mechanisms maintaining honesty rather than the involvement of carotenoids in immune function and oxidative stress and suggest experiments on how to test these.
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Affiliation(s)
- Mirre J P Simons
- Behavioural Biology, University of Groningen, Groningen, The Netherlands.
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Tybur JM, Gangestad SW. Mate preferences and infectious disease: theoretical considerations and evidence in humans. Philos Trans R Soc Lond B Biol Sci 2012; 366:3375-88. [PMID: 22042915 DOI: 10.1098/rstb.2011.0136] [Citation(s) in RCA: 83] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Mate preferences may operate in part to mitigate the threats posed by infectious disease. In this paper, we outline various ways in which preferring healthy mates can offer direct benefits in terms of pathogen avoidance and indirect benefits in terms of heritable immunity to offspring, as well as the costs that may constrain mate preferences for health. We then pay special attention to empirical work on mate preferences in humans given the depth and breadth of research on human mating. We review this literature and comment on the degree to which human mate preferences may reflect preferences for health.
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Affiliation(s)
- Joshua M Tybur
- Department of Social and Organizational Psychology, VU University Amsterdam, Amsterdam, The Netherlands
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Sepp T, Karu U, Blount JD, Sild E, Männiste M, Hõrak P. Coccidian infection causes oxidative damage in greenfinches. PLoS One 2012; 7:e36495. [PMID: 22615772 PMCID: PMC3352913 DOI: 10.1371/journal.pone.0036495] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2012] [Accepted: 04/03/2012] [Indexed: 12/22/2022] Open
Abstract
The main tenet of immunoecology is that individual variation in immune responsiveness is caused by the costs of immune responses to the hosts. Oxidative damage resulting from the excessive production of reactive oxygen species during immune response is hypothesized to form one of such costs. We tested this hypothesis in experimental coccidian infection model in greenfinches Carduelis chloris. Administration of isosporan coccidians to experimental birds did not affect indices of antioxidant protection (TAC and OXY), plasma triglyceride and carotenoid levels or body mass, indicating that pathological consequences of infection were generally mild. Infected birds had on average 8% higher levels of plasma malondialdehyde (MDA, a toxic end-product of lipid peroxidation) than un-infected birds. The birds that had highest MDA levels subsequent to experimental infection experienced the highest decrease in infection intensity. This observation is consistent with the idea that oxidative stress is a causative agent in the control of coccidiosis and supports the concept of oxidative costs of immune responses and parasite resistance. The finding that oxidative damage accompanies even the mild infection with a common parasite highlights the relevance of oxidative stress biology for the immunoecological research.
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Affiliation(s)
- Tuul Sepp
- Department of Zoology, Institute of Ecology and Earth Sciences, The Centre of Excellence FIBIR, Tartu University, Tartu, Estonia.
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Sepp T, Sild E, Blount JD, Männiste M, Karu U, Hõrak P. Individual Consistency and Covariation of Measures of Oxidative Status in Greenfinches. Physiol Biochem Zool 2012; 85:299-307. [DOI: 10.1086/664827] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Martinez-Padilla J, Vergara P, Mougeot F, Redpath SM. Parasitized mates increase infection risk for partners. Am Nat 2012; 179:811-20. [PMID: 22617268 DOI: 10.1086/665664] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Individuals can gain fitness benefits and costs through their mates. However, studies on sexual selection have tended to focus on genetic benefits. A potentially widespread cost of pairing with a parasitized mate is that doing so will increase an individual's parasite abundance. Such a cost has been overlooked in systems in which parasites are indirectly transmitted. We manipulated the abundance of the nematode parasite Trichostrongylus tenuis, an indirectly transmitted parasite, within pairs of wild red grouse Lagopus lagopus scoticus in spring. Parasite levels were correlated within pairs before the experiment. We removed parasites from males, females, or both members of the pair and evaluated individual parasite uptake over the subsequent breeding period. At the end of the breeding season, an individual's parasite abundance was greater when its mate had not been initially purged of parasites. This cost appeared to be greater for males. We discuss the implications of our results in relation to the costs that parasites may have on sexual selection processes.
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Affiliation(s)
- Jesus Martinez-Padilla
- Department of Evolutionary Ecology, Museo Nacional de Ciencias Naturales, Consejo Superior de Investigaciones Científicas (CSIC), José Gutiérrez Abascal 2, 28006 Madrid, Spain.
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Orledge JM, Blount JD, Hoodless AN, Royle NJ. Antioxidant supplementation during early development reduces parasite load but does not affect sexual ornament expression in adult ring-necked pheasants. Funct Ecol 2012. [DOI: 10.1111/j.1365-2435.2012.01977.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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Experimental assessment of the effects of gastrointestinal parasites on offspring quality in chinstrap penguins (Pygoscelis antarctica). Parasitology 2012; 139:819-24. [DOI: 10.1017/s0031182011002381] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
SUMMARYParasites reduce host fitness and consequently impose strong selection pressures on their hosts. It has been hypothesized that parasites are scarcer and their overall effect on hosts is weaker at higher latitudes. Although Antarctic birds have relatively low numbers of parasites, their effect on host fitness has rarely been investigated. The effect of helminth parasitism on growth rate was experimentally studied in chinstrap penguin (Pygoscelis antarctica) nestlings. In a total of 22 two-nestling broods, 1 nestling was treated with anthelminthics (for cestodes and nematodes) while its sibling was left as a control. Increased growth rate was predicted in de-wormed nestlings compared to their siblings. As expected, 15 days after treatment, the experimental nestlings had increased body mass more than their siblings. These results show a non-negligible negative effect of helminth parasites on nestling body condition that would presumably affect future survival and thus fitness, and it has been suggested there is a strong relationship between body mass and mortality in chinstrap penguins.
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Contrasted effects of an oxidative challenge and α-melanocyte-stimulating hormone on cellular immune responsiveness: an experiment with red-legged partridges Alectoris rufa. Oecologia 2011; 169:385-94. [DOI: 10.1007/s00442-011-2220-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2011] [Accepted: 11/26/2011] [Indexed: 11/30/2022]
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LOSDAT S, HELFENSTEIN F, SALADIN V, RICHNER H. Higher in vitro resistance to oxidative stress in extra-pair offspring. J Evol Biol 2011; 24:2525-30. [DOI: 10.1111/j.1420-9101.2011.02374.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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Hill GE. Condition-dependent traits as signals of the functionality of vital cellular processes. Ecol Lett 2011; 14:625-34. [DOI: 10.1111/j.1461-0248.2011.01622.x] [Citation(s) in RCA: 271] [Impact Index Per Article: 20.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Mougeot F, Martínez-Padilla J, Bortolotti GR, Webster LMI, Piertney SB. Oxidative stress and the effect of parasites on a carotenoid-based ornament. Corrigendum. J Evol Biol 2010; 23:1579. [PMID: 20642635 DOI: 10.1111/j.1420-9101.2010.02045.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- F Mougeot
- EEZA (CSIC), Almeria, Spain; e-mail:
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Pérez-Rodríguez L, Mougeot F, Alonso-Alvarez C. Carotenoid-based coloration predicts resistance to oxidative damage during immune challenge. J Exp Biol 2010; 213:1685-90. [PMID: 20435819 DOI: 10.1242/jeb.039982] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
SUMMARY
Many animal ornaments may have evolved as signals advertising the quality of the bearer. The honesty of the information content of these signals would rely on the costs associated with their expression, these being relatively greater for low-quality than for high-quality individuals. Given the physiological functions of carotenoids, carotenoid-based ornaments could indicate individual immunocompetence, and possibly the ability to mount an immune response at a lower cost. We evaluated whether the red carotenoid-based coloration of male red-legged partridges (Alectoris rufa) predicts the capacity of the individual to counteract the oxidative stress generated by a cell-mediated immune response. Individuals were subcutaneously injected with phytohaemagglutinin (PHA) or phosphate buffer solution (PBS) as a control. We found that eye ring pigmentation predicted the change in the amount of peroxidized lipids (TBARS) in blood after the PHA-induced inflammatory challenge. The degree of pigmentation of this carotenoid-based ornament was also negatively related to individual changes in γ-glutamyl transferase (GGT), another biomarker of oxidative stress involved in antioxidant metabolism (i.e. glutathione recycling). However, changes in circulating carotenoids did not significantly explain changes in lipid peroxidation or GGT levels, suggesting that the higher resistance to oxidative stress of those individuals with more pigmented eye rings was not directly mediated by their greater circulating levels of carotenoids. Our results indicate that carotenoid-based coloration can predict not only immune responsiveness (more coloured males mount greater responses) but also an individual's ability to counter the oxidative stress generated during immune challenge (more coloured males experience less oxidative damage when mounting an immune response).
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Affiliation(s)
- Lorenzo Pérez-Rodríguez
- Departamento de Ecología Evolutiva, Museo Nacional de Ciencias Naturales (CSIC), José Gutiérrez Abascal 2, 28006 Madrid, Spain
- Instituto de Investigación en Recursos Cinegéticos, IREC (CSIC, UCLM, JCCM), Ronda de Toledo s/n, 13005 Ciudad Real, Spain
| | - Francois Mougeot
- Instituto de Investigación en Recursos Cinegéticos, IREC (CSIC, UCLM, JCCM), Ronda de Toledo s/n, 13005 Ciudad Real, Spain
- Estación Experimental de Zonas Áridas (CSIC), Ctra. de Sacramento s/n, La Cañada de San Urbano, 04120 Almería, Spain
| | - Carlos Alonso-Alvarez
- Instituto de Investigación en Recursos Cinegéticos, IREC (CSIC, UCLM, JCCM), Ronda de Toledo s/n, 13005 Ciudad Real, Spain
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Knight K. GROUSE COMMUNICATE STATE OF HEALTH WITH RED COMBS. J Exp Biol 2010. [DOI: 10.1242/jeb.041822] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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