1
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Dickinson ER, McFarland C, Toïgo C, Michael Scantlebury D, Stephens PA, Marks NJ, Morgan ER. Host movement dominates the predicted effects of climate change on parasite transmission between wild and domestic mountain ungulates. ROYAL SOCIETY OPEN SCIENCE 2024; 11:230469. [PMID: 38179074 PMCID: PMC10762430 DOI: 10.1098/rsos.230469] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/11/2023] [Accepted: 12/05/2023] [Indexed: 01/06/2024]
Abstract
Climate change is shifting the transmission of parasites, which is determined by host density, ambient temperature and moisture. These shifts can lead to increased pressure from parasites, in wild and domestic animals, and can impact the effectiveness of parasite control strategies. Understanding the interactive effects of climate on host movement and parasite life histories will enable targeted parasite management, to ensure livestock productivity and avoid additional stress on wildlife populations. To assess complex outcomes under climate change, we applied a gastrointestinal nematode transmission model to a montane wildlife-livestock system, based on host movement and changes in abiotic factors due to elevation, comparing projected climate change scenarios with the historic climate. The wildlife host, Alpine ibex (Capra ibex ibex), undergoes seasonal elevational migration, and livestock are grazed during the summer for eight weeks. Total parasite infection pressure was more sensitive to host movement than to the direct effect of climatic conditions on parasite availability. Extended livestock grazing is predicted to increase parasite exposure for wildlife. These results demonstrate that movement of different host species should be considered when predicting the effects of climate change on parasite transmission, and can inform decisions to support wildlife and livestock health.
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Affiliation(s)
- Eleanor R. Dickinson
- School of Biological Sciences, Queen's University Belfast, 19 Chlorine Gardens, Belfast BT9 5DL, UK
| | - Christopher McFarland
- School of Biological Sciences, Queen's University Belfast, 19 Chlorine Gardens, Belfast BT9 5DL, UK
| | - Carole Toïgo
- Office Français de la Biodiversité, 5 allée de Bethléem, ZI Mayencin 38610, Gières, France
| | - D. Michael Scantlebury
- School of Biological Sciences, Queen's University Belfast, 19 Chlorine Gardens, Belfast BT9 5DL, UK
| | - Philip A. Stephens
- Conservation Ecology Group, Department of Biosciences, Durham University, South Road, Durham DH1 3LE, UK
| | - Nikki J. Marks
- School of Biological Sciences, Queen's University Belfast, 19 Chlorine Gardens, Belfast BT9 5DL, UK
| | - Eric R. Morgan
- School of Biological Sciences, Queen's University Belfast, 19 Chlorine Gardens, Belfast BT9 5DL, UK
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2
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Corlatti L, Cotza A. Age-specific survival of territorial and non-territorial male chamois. J Evol Biol 2023. [PMID: 37224143 DOI: 10.1111/jeb.14183] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2022] [Revised: 03/25/2023] [Accepted: 04/18/2023] [Indexed: 05/26/2023]
Abstract
How alternative reproductive tactics (ARTs) are maintained in wildlife populations is one of the major questions in evolutionary biology. As a dominant status, territoriality is typically linked to increased mating opportunities, and one explanation why this behaviour coexists with other tactics is that dominance implies survival costs. Such a trade-off may occur in the Northern chamois Rupicapra rupicapra, as reproductive advantages of territorial males over non-territorial males could be counterbalanced by a reduction in survival mediated through energy expenditure, stress and parasitic infections, ultimately favouring ART coexistence. Here, we analysed age-dependent survival probabilities of territorial (n = 15) and non-territorial (n = 16) adult chamois using information collected over 12 years between 2010 and 2021 in the Gran Paradiso National Park (Western Italian Alps). Survival rates were estimated with a CMR approach using Burnham's joint modelling of live encounter and dead recovery data. The model selection procedure, based on AICc value minimisation, supported a linear decrease of survival with age but the results did not match our predictions, as territorial chamois did not have lower survival rates than non-territorial chamois. In contrast, territorial males appeared to enjoy reproductive success at lower survival costs. This, in turn, supports the role of other factors, such as snow-dependent environmental stochasticity, in the maintenance of ARTs in chamois populations. The limited sample size, however, calls for caution in interpretation, and long-term studies of lifetime reproductive success and survival are necessary to clarify the mechanisms underlying the expression and coexistence of different reproductive behaviours in this species.
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Affiliation(s)
- Luca Corlatti
- Chair of Wildlife Ecology and Management, University of Freiburg, Freiburg, Germany
- Stelvio National Park - ERSAF Lombardia, Bormio, Italy
| | - Antonella Cotza
- Research Unit of Behavioural Ecology, Ethology and Wildlife Management, Department of Life Sciences, University of Siena, Siena, Italy
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3
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Reiner R, Zedrosser A, Zeiler H, Hackländer K, Corlatti L. Habitat and climate shape growth patterns in a mountain ungulate. Ecol Evol 2022; 12:e8650. [PMID: 35309748 PMCID: PMC8901871 DOI: 10.1002/ece3.8650] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2021] [Revised: 01/17/2022] [Accepted: 02/03/2022] [Indexed: 11/11/2022] Open
Abstract
Uptake and use of energy are of key importance for animals living in temperate environments that undergo strong seasonal changes in forage quality and quantity. In ungulates, energy intake strongly affects body mass gain, an important component of individual fitness. Energy allocation among life-history traits can be affected by internal and external factors. Here, we investigate large-scale variation in body growth patterns of Alpine chamois Rupicapra rupicapra rupicapra, in relation to sex, age, temperature, and habitat variations across 31 (sub)populations in the Central European Alps. Taking advantage of an exceptionally large dataset (n = 178,175) of chamois hunted over 27 consecutive years between 1993 and 2019 in mountain ranges with different proportions of forest cover, we found that (i) patterns of body mass growth differ between mountain ranges, with lower body mass but faster mass growth with increasing proportion of forest cover and that (ii) the effect of spring and summer temperatures on changes in body growth patterns are larger in mountain ranges with lower forest cover compared to mountain ranges with higher forest cover. Our results show that patterns of body mass growth within a species are more plastic than expected and depend on environmental and climatic conditions. The recent decline in body mass observed in Alpine chamois populations may have greater impacts on populations living above the treeline than in forests, which may buffer against the effects of increasing temperatures on life-history traits.
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Affiliation(s)
- Rudolf Reiner
- Berchtesgaden National ParkBerchtesgadenGermany
- Institute of Wildlife Biology and Game ManagementUniversity of Natural Resources and Life Sciences, ViennaViennaAustria
| | - Andreas Zedrosser
- Institute of Wildlife Biology and Game ManagementUniversity of Natural Resources and Life Sciences, ViennaViennaAustria
- Department of Natural Sciences and Environmental HealthUniversity of South‐Eastern NorwayTelemarkNorway
| | | | - Klaus Hackländer
- Institute of Wildlife Biology and Game ManagementUniversity of Natural Resources and Life Sciences, ViennaViennaAustria
- Deutsche Wildtier Stiftung (German Wildlife Foundation)HamburgGermany
| | - Luca Corlatti
- Wildlife Ecology and ManagementUniversity of FreiburgFreiburgGermany
- Stelvio National ParkBormioItaly
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4
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Attum O, Soultan A, Bender LC. Survivorship in a heavily hunted population of Nubian ibex (
Capra nubiana
). Afr J Ecol 2021. [DOI: 10.1111/aje.12940] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Omar Attum
- Department of Biology Indiana University Southeast New Albany IN USA
| | - Alaaeldin Soultan
- Department of Ecology Swedish University of Agricultural Sciences Uppsala Sweden
| | - Louis C. Bender
- Extension Animal Sciences and Natural Resources New Mexico State University Las Cruces NM USA
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5
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Macartney EL, Bonduriansky R. Does female resistance to mating select for live-fast-die-young strategies in males? A comparative analysis in the genus Drosophila. J Evol Biol 2021; 35:192-200. [PMID: 34547153 DOI: 10.1111/jeb.13937] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2021] [Revised: 09/08/2021] [Accepted: 09/15/2021] [Indexed: 11/29/2022]
Abstract
Female promiscuity is a pervasive selective force on male reproductive traits, and the strength of sexual selection is predicted to influence the trade-off between lifespan and reproduction. In species where sexual selection is intense, males are predicted to invest in sexual strategies that shorten their lifespan, potentially resulting in female-biased sexual dimorphism in longevity. However, comparative analyses have provided contrasting results, potentially due to the use of broad mating system categories or sexual size dimorphism as a proxy for sexual selection. Here, we used female remating rate (i.e. female promiscuity) as a more direct measure of sexual selection strength and conducted a phylogenetic comparative analysis of the relationship between female remating rate and sexual dimorphism in lifespan in 29 species of Drosophila. We did not find strong evidence that female remating rate was correlated with sexual dimorphism in lifespan. However, we found that male and female lifespans are positively correlated among species and that phylogeny and residual variance (i.e. variation in non-phylogenetic factors) are important in determining female remating rate, male and female lifespans separately, and the correlation between male and female lifespan. We suggest that variation in the nature of sexual competition and variation between studies could account for some of the unexplained variation among species in the relation between female remating rate and sexual dimorphism in lifespan.
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Affiliation(s)
- Erin L Macartney
- Evolution and Ecology Research Centre, School of Biological, Earth and Environmental Sciences, Faculty of Sciences, University of New South Wales, Sydney, NSW, Australia
| | - Russell Bonduriansky
- Evolution and Ecology Research Centre, School of Biological, Earth and Environmental Sciences, Faculty of Sciences, University of New South Wales, Sydney, NSW, Australia
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6
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Willisch CS, Neuhaus P. Reproductive effort affects subsequent horn growth in sexually dimorphic male ungulates. Evol Ecol 2021. [DOI: 10.1007/s10682-021-10128-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
AbstractTrade-offs between reproductive effort and subsequent growth in males are not well explored, despite their relevance in questions of individual energy allocation. Regarding the growth of sexual secondary characters in polygynous breeding male mammals, indeed, no conclusive studies exist. We investigated in male Alpine ibex (Capra ibex) the relationship between their behavioral reproductive effort, current horn size, and subsequent horn growth. While controlling for age, no evidence was found for male behavioral reproductive effort during the rut being affected by their horn size. On the other hand, reproductive effort significantly decreased age-specific horn growth during the following summer. Our study provides evidence that growth of secondary sexual characters is traded against behavioral investments in reproduction in a male mammal. It bears important implications for the understanding of energy allocation between various life-history components and the evolutionary ecology of secondary sexual characters.
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7
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Tidière M, Gaillard J, Garel M, Lemaître J, Toïgo C, Pélabon C. Variation in the ontogenetic allometry of horn length in bovids along a body mass continuum. Ecol Evol 2020; 10:4104-4114. [PMID: 32489634 PMCID: PMC7244813 DOI: 10.1002/ece3.6181] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2019] [Revised: 02/04/2020] [Accepted: 02/24/2020] [Indexed: 12/18/2022] Open
Abstract
Allometric relationships describe the proportional covariation between morphological, physiological, or life-history traits and the size of the organisms. Evolutionary allometries estimated among species are expected to result from species differences in ontogenetic allometry, but it remains uncertain whether ontogenetic allometric parameters and particularly the ontogenetic slope can evolve. In bovids, the nonlinear evolutionary allometry between horn length and body mass in males suggests systematic changes in ontogenetic allometry with increasing species body mass. To test this hypothesis, we estimated ontogenetic allometry between horn length and body mass in males and females of 19 bovid species ranging from ca. 5 to 700 kg. Ontogenetic allometry changed systematically with species body mass from steep ontogenetic allometries over a short period of horn growth in small species to shallow allometry with the growth period of horns matching the period of body mass increase in the largest species. Intermediate species displayed steep allometry over long period of horn growth. Females tended to display shallower ontogenetic allometry with longer horn growth compared to males, but these differences were weak and highly variable. These findings show that ontogenetic allometric slope evolved across species possibly as a response to size-related changes in the selection pressures acting on horn length and body mass.
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Affiliation(s)
- Morgane Tidière
- Department of BiologyCentre for Biodiversity DynamicsNTNUNorwegian University of Science and TechnologyTrondheimNorway
| | - Jean‐Michel Gaillard
- Laboratoire de Biométrie et Biologie Evolutive - UMR5558 - CNRSUniversité Claude Bernard Lyon 1Université de LyonVilleurbanneFrance
| | | | - Jean‐François Lemaître
- Laboratoire de Biométrie et Biologie Evolutive - UMR5558 - CNRSUniversité Claude Bernard Lyon 1Université de LyonVilleurbanneFrance
| | - Carole Toïgo
- Office Français pour la BiodiversitéGièresFrance
| | - Christophe Pélabon
- Department of BiologyCentre for Biodiversity DynamicsNTNUNorwegian University of Science and TechnologyTrondheimNorway
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8
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Grow fast at no cost: no evidence for a mortality cost for fast early-life growth in a hunted wild boar population. Oecologia 2020; 192:999-1012. [PMID: 32242324 PMCID: PMC7165149 DOI: 10.1007/s00442-020-04633-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2019] [Accepted: 03/10/2020] [Indexed: 11/12/2022]
Abstract
From current theories on life-history evolution, fast early-life growth to reach early reproduction in heavily hunted populations should be favored despite the possible occurrence of mortality costs later on. However, fast growth may also be associated with better individual quality and thereby lower mortality, obscuring a clear trade-off between early-life growth and survival. Moreover, fast early-life growth can be associated with sex-specific mortality costs related to resource acquisition and allocation throughout an individual’s lifetime. In this study, we explore how individual growth early in life affects age-specific mortality of both sexes in a heavily hunted population. Using longitudinal data from an intensively hunted population of wild boar (Sus scrofa), and capture–mark–recapture–recovery models, we first estimated age-specific overall mortality and expressed it as a function of early-life growth rate. Overall mortality models showed that faster-growing males experienced lower mortality at all ages. Female overall mortality was not strongly related to early-life growth rate. We then split overall mortality into its two components (i.e., non-hunting mortality vs. hunting mortality) to explore the relationship between growth early in life and mortality from each cause. Faster-growing males experienced lower non-hunting mortality as subadults and lower hunting mortality marginal on age. Females of all age classes did not display a strong association between their early-life growth rate and either mortality type. Our study does not provide evidence for a clear trade-off between early-life growth and mortality.
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9
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Douhard M, Crampe J, Loison A, Bonenfant C. A negative association between horn length and survival in a weakly dimorphic ungulate. Ecol Evol 2020; 10:2793-2802. [PMID: 32211156 PMCID: PMC7083655 DOI: 10.1002/ece3.6050] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2019] [Revised: 12/09/2019] [Accepted: 12/09/2019] [Indexed: 11/23/2022] Open
Abstract
While all models of sexual selection assume that the development and expression of enlarged secondary sexual traits are costly, males with larger ornaments or weapons generally show greater survival or longevity. These studies have mostly been performed in species with high sexual size dimorphism, subject to intense sexual selection. Here, we examined the relationships between horn growth and several survival metrics in the weakly dimorphic Pyrenean chamois (Rupicapra pyrenaica). In this unhunted population living at high density, males and females were able to grow long horns without any apparent costs in terms of longevity. However, we found a negative relationship between horn growth and survival during prime age in males. This association reduces the potential evolutionary consequences of trophy hunting in male chamois. We also found that females with long horns tended to have lower survival at old ages. Our results illustrate the contrasting conclusions that may be drawn when different survival metrics are used in analyses. The ability to detect trade-off between the expression of male secondary sexual traits and survival may depend more on environmental conditions experienced by the population than on the strength of sexual selection.
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Affiliation(s)
- Mathieu Douhard
- Laboratoire d’Écologie AlpineUMR CNRS 5553Université Savoie Mont‐BlancLe Bourget‐du‐LacFrance
| | | | - Anne Loison
- Laboratoire d’Écologie AlpineUMR CNRS 5553Université Savoie Mont‐BlancLe Bourget‐du‐LacFrance
| | - Christophe Bonenfant
- Laboratoire de Biométrie et Biologie ÉvolutiveUMR CNRS 5558Université Lyon 1VilleurbanneFrance
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10
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Carvalho J, Büntgen U, Pettorelli N, Mentaberre G, Olivé‐boix X, Eizaguirre O, Pérez JM, Fandos P, Torres RT, Lavín S, Fonseca C, Serrano E. Habitat and Harvesting Practices Influence Horn Growth of Male Ibex. J Wildl Manage 2020. [DOI: 10.1002/jwmg.21830] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- João Carvalho
- Department of Biology and Centre for Environmental and Marine Studies (CESAM)University of Aveiro Aveiro Portugal
| | - Ulf Büntgen
- Department of GeographyUniversity of Cambridge Cambridge United Kingdom
| | - Nathalie Pettorelli
- Institute of ZoologyZoological Society of London Regent's Park London United Kingdom
| | - Gregorio Mentaberre
- Wildlife Ecology & Health Group (WE&H) and Servei d'Ecopatologia de Fauna Salvatge (SEFaS), Departament de Medicina i Cirurgia AnimalsUniversitat Autònoma de Barcelona, Bellaterra Barcelona Spain
| | - Xavier Olivé‐boix
- Reserva Nacional de Caça dels Ports de Tortosa i Beseit, RoquetesTarragona Spain
| | - Oihana Eizaguirre
- Wildlife Ecology & Health Group (WE&H) and Servei d'Ecopatologia de Fauna Salvatge (SEFaS), Departament de Medicina i Cirurgia AnimalsUniversitat Autònoma de Barcelona, Bellaterra Barcelona Spain
| | - Jesús M. Pérez
- Departamento de Biología AnimalBiología Vegetal y Ecología, Universidad de Jaén Campus Las Lagunillas Jaén Spain
| | - Paulino Fandos
- Agencia de Medio Ambiente y Agua, Isla de la Cartuja Sevilla Spain
| | - Rita T. Torres
- Department of Biology and Centre for Environmental and Marine Studies (CESAM)University of AveiroAveiro Portugal
| | - Santiago Lavín
- Wildlife Ecology & Health Group (WE&H) and Servei d'Ecopatologia de Fauna Salvatge (SEFaS), Departament de Medicina i Cirurgia AnimalsUniversitat Autònoma de Barcelona, Bellaterra Barcelona Spain
| | - Carlos Fonseca
- Department of Biology & Centre for Environmental and Marine Studies (CESAM)University of AveiroAveiro Portugal
| | - Emmanuel Serrano
- Wildlife Ecology & Health Group (WE&H) and Servei d'Ecopatologia de Fauna Salvatge (SEFaS), Departament de Medicina i Cirurgia AnimalsUniversitat Autònoma de Barcelona, Bellaterra Barcelona Spain
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11
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Kavčić K, Corlatti L, Safner T, Budak N, Šprem N. Contrasting patterns of sexually selected traits in Mediterranean and continental populations of European mouflon. Ecol Evol 2020; 10:2085-2092. [PMID: 32128140 PMCID: PMC7042679 DOI: 10.1002/ece3.6041] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2019] [Revised: 12/20/2019] [Accepted: 01/06/2020] [Indexed: 12/13/2022] Open
Abstract
The expression of sexually selected traits in highly dimorphic ungulates may be influenced by environmental quality. Variations in habitat conditions can impose different constraints on the allocation of energy resources to male life-history traits, and possibly alter the female preferences for specific features. Here, we compared the horn growth patterns in male European mouflon Ovis aries musimon living in different habitats (Mediterranean vs. continental) but sharing a common genetic origin. We hypothesized that the expression of sexually selected traits such as horn development should be promoted in more favorable habitat conditions (i.e., Mediterranean). Using linear mixed models on data retrieved from individuals harvested under the same hunting regime, we found longer horns and greater individual variance in horn segment length in the Mediterranean population than in the continental one. Furthermore, Mediterranean rams showed no evidence of compensatory horn growth, as opposed to the continental rams. Unexpectedly, horn base circumference was greater in the continental habitat than in the Mediterranean one. The overall results suggest different patterns of investment in horns in the two populations, with seemingly stronger pressure and consequences of sexual selection on mouflon rams living in more favorable environments. Although the role of hunters' selectivity cannot be excluded a priori, our data suggest that the differences in the expression of sexually selected traits in our study populations may be influenced by environmental conditions. Because sexual selection can impose substantial fitness costs on individuals, further investigations on the trade-offs between reproduction and survival would improve our understanding of the dynamics of mouflon populations living in different environmental conditions.
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Affiliation(s)
- Krešimir Kavčić
- Department of Fisheries, Apiculture, Wildlife Management and Special ZoologyFaculty of AgricultureUniversity of ZagrebZagrebCroatia
| | - Luca Corlatti
- Chair of Wildlife Ecology and ManagementUniversity of FreiburgFreiburgGermany
| | - Toni Safner
- Department of Plant Breeding, Genetics and BiometricsFaculty of AgricultureUniversity of ZagrebZagrebCroatia
- Centre of Excellence for Biodiversity and Molecular Plant Breeding (CoE CroP‐BioDiv)ZagrebCroatia
| | | | - Nikica Šprem
- Department of Fisheries, Apiculture, Wildlife Management and Special ZoologyFaculty of AgricultureUniversity of ZagrebZagrebCroatia
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12
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Lloyd KJ, Oosthuizen WC, Bester MN, de Bruyn PJN. Trade-offs between age-related breeding improvement and survival senescence in highly polygynous elephant seals: Dominant males always do better. J Anim Ecol 2019; 89:897-909. [PMID: 31746466 DOI: 10.1111/1365-2656.13145] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2019] [Accepted: 10/02/2019] [Indexed: 11/27/2022]
Abstract
Life history trade-off theory predicts that current reproduction can negatively affect survival and future reproduction. Few studies have assessed breeding costs for males of polygynous species compared to females, despite substantial variation in breeding success among individual males (e.g. subordinate cf. dominant breeders). Specifically, differentiating between the cost of attending breeding seasons, and the additional cost of successfully securing and mating females is lacking. We investigated whether trade-offs are present in the highly polygynous male southern elephant seal (Mirounga leonina) using 34-years of individual-level data. We compare age-specific survival, recruitment and future breeding success probabilities of pre-breeders (males yet to recruit) and breeders (subordinate and dominant social ranks) using multievent models. Pre-breeders and breeders of overlapping ages had similar survival probabilities, suggesting that there was no attendance cost for early recruits. In addition, the probability of recruiting as a dominant breeder never exceeded recruitment probability as a subordinate breeder of the same age. Therefore, older pre-breeders that delayed attendance costs generally did not improve their breeding success (probability of being dominant) at recruitment more than younger recruits. Rather, recruitment age may be a function of individual quality, with lower quality individuals requiring more time to socially mature. When comparing subordinate and dominant breeders, we found clear evidence for survival senescence, with subordinate breeders having a higher baseline mortality. In contrast, age-specific future breeding success (probability of being dominant at t + 1) increased with age, with dominant breeders maintaining higher subsequent breeding success than subordinate breeders. The opposite trends in survival and future breeding success for both subordinate and dominant breeders may indicate a lifetime, population-level trade-off. However, we found no evidence to suggest that being a dominant breeder consecutively (and having a higher accumulated breeding cost) accelerated the rate of senescence when compared to individuals that were previously subordinate. Thus, males experienced actuarial senescence regardless of social rank, with dominant (and possibly high quality) breeders showing a reduced trade-off between survival and future breeding success. We make several novel contributions to understanding polygynous male life histories and southern elephant seal demography.
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Affiliation(s)
- Kyle J Lloyd
- Mammal Research Institute, Department of Zoology and Entomology, University of Pretoria, Private Bag X20, Hatfield, Pretoria, 0028, South Africa
| | - W Chris Oosthuizen
- Mammal Research Institute, Department of Zoology and Entomology, University of Pretoria, Private Bag X20, Hatfield, Pretoria, 0028, South Africa
| | - Marthán N Bester
- Mammal Research Institute, Department of Zoology and Entomology, University of Pretoria, Private Bag X20, Hatfield, Pretoria, 0028, South Africa
| | - P J Nico de Bruyn
- Mammal Research Institute, Department of Zoology and Entomology, University of Pretoria, Private Bag X20, Hatfield, Pretoria, 0028, South Africa
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13
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Festa‐Bianchet M, Côté SD, Hamel S, Pelletier F. Long‐term studies of bighorn sheep and mountain goats reveal fitness costs of reproduction. J Anim Ecol 2019; 88:1118-1133. [DOI: 10.1111/1365-2656.13002] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2018] [Accepted: 03/20/2019] [Indexed: 11/30/2022]
Affiliation(s)
- Marco Festa‐Bianchet
- Département de biologie Université de Sherbrooke Sherbrooke Québec Canada
- Centre d'études nordiques Québec City Québec Canada
| | - Steeve D. Côté
- Centre d'études nordiques Québec City Québec Canada
- Département de biologie Université Laval Sainte‐Foy Québec Canada
| | - Sandra Hamel
- Department of Arctic and Marine Biology, Faculty of Biosciences, Fisheries, and Economics UiT The Arctic University of Norway Tromsø Norway
| | - Fanie Pelletier
- Département de biologie Université de Sherbrooke Sherbrooke Québec Canada
- Centre d'études nordiques Québec City Québec Canada
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14
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Lemaître JF, Cheynel L, Douhard F, Bourgoin G, Débias F, Ferté H, Gilot-Fromont E, Pardonnet S, Pellerin M, Rey B, Vanpé C, Hewison AJM, Gaillard JM. The influence of early-life allocation to antlers on male performance during adulthood: Evidence from contrasted populations of a large herbivore. J Anim Ecol 2019; 87:921-932. [PMID: 29931770 DOI: 10.1111/1365-2656.12833] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2017] [Accepted: 03/21/2018] [Indexed: 12/01/2022]
Abstract
To secure mating opportunities, males often develop and maintain conspicuous traits that are involved in intrasexual and/or intersexual competition. While current models of sexual selection rely on the assumption that producing such traits is costly, quantifying the cost of allocating to secondary sexual traits remains challenging. According to the principle of allocation, high energy allocation to growth or sexual traits in males should lead to reduced energy allocation to the maintenance of cellular and physiological functions, potentially causing them to age faster, with impaired survival. We evaluated the short-term and delayed consequences of energy allocation to antlers early in life in two contrasted populations of roe deer, Capreolus capreolus. Although most males mate successfully for the first time in their fourth year, antlers are grown annually from the first year of life onwards. We tested the prediction that a high level of allocation to antler growth during the first two years of life should lead to lower body mass, antler size and survival during the early and late prime stages, as well as to reduced longevity overall. Growing and carrying long antlers during the first years of life was not associated with any detectable cost in the late prime stage. The positive association between antler growth in early life and adult body mass instead supports that fawn antler acts as an honest signal of phenotypic quality in roe deer. For a given body mass, yearling males growing longer antlers displayed impaired performance during their late prime. We also found a trend for a short-term survival cost of allocation to relative antler length during the second year of life. Yearling males that grow long antlers relative to their mass might display a fast life-history tactic. We argue that differential allocation to secondary sexual traits generates a diversity of individual trajectories that should impact population dynamics.
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Affiliation(s)
- Jean-François Lemaître
- Laboratoire de Biométrie et Biologie Evolutive UMR5558, Univ Lyon, Université Lyon 1 CNRS, Villeurbanne, France
| | - Louise Cheynel
- Laboratoire de Biométrie et Biologie Evolutive UMR5558, Univ Lyon, Université Lyon 1 CNRS, Villeurbanne, France
| | - Frédéric Douhard
- Laboratoire de Biométrie et Biologie Evolutive UMR5558, Univ Lyon, Université Lyon 1 CNRS, Villeurbanne, France.,GenPhySE, Université de Toulouse, INRA, INPT, INP-ENVT, Castanet Tolosan, France
| | - Gilles Bourgoin
- Laboratoire de Biométrie et Biologie Evolutive UMR5558, Univ Lyon, Université Lyon 1 CNRS, Villeurbanne, France.,VetAgro Sup, Université de Lyon, Marcy-l'Etoile, France
| | - François Débias
- Laboratoire de Biométrie et Biologie Evolutive UMR5558, Univ Lyon, Université Lyon 1 CNRS, Villeurbanne, France
| | - Hubert Ferté
- EA 4688 "VECPAR," UFR Pharmacie, Université de Reims Champagne-Ardenne, Reims, France
| | - Emmanuelle Gilot-Fromont
- Laboratoire de Biométrie et Biologie Evolutive UMR5558, Univ Lyon, Université Lyon 1 CNRS, Villeurbanne, France.,VetAgro Sup, Université de Lyon, Marcy-l'Etoile, France
| | - Sylvia Pardonnet
- Laboratoire de Biométrie et Biologie Evolutive UMR5558, Univ Lyon, Université Lyon 1 CNRS, Villeurbanne, France
| | - Maryline Pellerin
- Office National de la Chasse et de la Faune Sauvage, Unité Cervidés-Sanglier, Bar-le-Duc, France
| | - Benjamin Rey
- Laboratoire de Biométrie et Biologie Evolutive UMR5558, Univ Lyon, Université Lyon 1 CNRS, Villeurbanne, France
| | - Cécile Vanpé
- Laboratoire de Biométrie et Biologie Evolutive UMR5558, Univ Lyon, Université Lyon 1 CNRS, Villeurbanne, France.,Office National de la Chasse et de la Faune Sauvage, Unité Prédateurs - Animaux déprédateurs, Villeneuve de Rivière, France
| | | | - Jean-Michel Gaillard
- Laboratoire de Biométrie et Biologie Evolutive UMR5558, Univ Lyon, Université Lyon 1 CNRS, Villeurbanne, France
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15
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16
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Kavčić K, Brivio F, Grignolio S, Ugarković D, Stankić I, Safner T, Apollonio M, Šprem N. Is chamois hybridization in the northern Dinaric Mountains an important factor for horn development? WILDLIFE BIOLOGY 2018. [DOI: 10.2981/wlb.00461] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
Affiliation(s)
- Krešimir Kavčić
- K. Kavčić and N. Šprem, Dept of Fisheries, Beekeeping, Game Management and Special
| | - Francesca Brivio
- F. Brivio, S. Grignolio and M. Apollonio, Dept of Veterinary Medicine, Univ. of Sassari, Sassari, It
| | - Stefano Grignolio
- F. Brivio, S. Grignolio and M. Apollonio, Dept of Veterinary Medicine, Univ. of Sassari, Sassari, It
| | - Damir Ugarković
- D. Ugarković, Dept of Forest Ecology and Silviculture, Faculty of Forestry, Univ. of Zagreb, Zagreb,
| | - Igor Stankić
- I. Stankić, Energy and Environmental Protection Inst. (EKONERG), Zagreb, Croatia
| | - Toni Safner
- T. Safner, Dept of Plant Breeding, Genetics and Biometrics, Faculty of Agriculture, Univ. of Zagreb,
| | - Marco Apollonio
- F. Brivio, S. Grignolio and M. Apollonio, Dept of Veterinary Medicine, Univ. of Sassari, Sassari, It
| | - Nikica Šprem
- K. Kavčić and N. Šprem, Dept of Fisheries, Beekeeping, Game Management and Special
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17
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Büntgen U, Galván JD, Mysterud A, Krusic PJ, Hülsmann L, Jenny H, Senn J, Bollmann K. Horn growth variation and hunting selection of the Alpine ibex. J Anim Ecol 2018; 87:1069-1079. [DOI: 10.1111/1365-2656.12839] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2017] [Accepted: 03/21/2018] [Indexed: 11/30/2022]
Affiliation(s)
- Ulf Büntgen
- Department of Geography; University of Cambridge; Cambridge UK
- Swiss Federal Research Institute WSL; Birmensdorf Switzerland
- Global Change Research Centre and Masaryk University; Brno Czech Republic
| | - Juan D. Galván
- Swiss Federal Research Institute WSL; Birmensdorf Switzerland
| | - Atle Mysterud
- Centre for Ecological and Evolutionary Synthesis (CEES); Department of Biosciences; University of Oslo; Oslo Norway
| | - Paul J. Krusic
- Department of Geography; University of Cambridge; Cambridge UK
- Department of Physical Geography; Stockholm University; Stockholm Sweden
| | - Lisa Hülsmann
- Swiss Federal Research Institute WSL; Birmensdorf Switzerland
- Forest Ecology; Institute of Terrestrial Ecosystems; Department of Environmental Sciences; ETH Zurich; Zurich Switzerland
- Department of Theoretical Ecology; University of Regensburg; Regensburg Germany
| | - Hannes Jenny
- Department of Wildlife and Fishery Service Grisons; Chur Switzerland
| | - Josef Senn
- Swiss Federal Research Institute WSL; Birmensdorf Switzerland
| | - Kurt Bollmann
- Swiss Federal Research Institute WSL; Birmensdorf Switzerland
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18
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19
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Fay R, Barbraud C, Delord K, Weimerskirch H. From early life to senescence: individual heterogeneity in a long-lived seabird. ECOL MONOGR 2017; 88:60-73. [PMID: 30122788 PMCID: PMC6084314 DOI: 10.1002/ecm.1275] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2016] [Revised: 06/01/2017] [Accepted: 06/13/2017] [Indexed: 01/20/2023]
Abstract
Although population studies have long assumed that all individuals of a given sex and age are identical, ignoring among‐individual differences may strongly bias our perception of eco‐evolutionary processes. Individual heterogeneity, often referred to as individual quality, has received increasing research attention in the last decades. However, there are still substantial gaps in our current knowledge. For example, there is little information on how individual heterogeneity influences various life‐history traits simultaneously, and studies describing individual heterogeneity in wild populations are generally not able to jointly identify possible sources of this variation. Here, based on a mark–recapture data set of 9,685 known‐aged Wandering Albatrosses (Diomedea exulans), we investigated the existence of individual quality over the entire life cycle of this species, from early life to senescence. Using finite mixture models, we investigated the expression of individual heterogeneity in various demographic traits, and examined the origin of these among‐individual differences by considering the natal environmental conditions. We found that some individuals consistently outperformed others during most of their life. In old age, however, the senescence rate was stronger in males that showed high demographic performance at younger ages. Variation in individual quality seemed strongly affected by extrinsic factors experienced during the ontogenetic period. We found that individuals born in years with high population density tended to have lower performances during their lifespan, suggesting delayed density dependence effects through individual quality. Our study showed that among‐individual differences could be important in structuring individual life history trajectories, with substantial consequences at higher ecological levels such as population dynamics.
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Affiliation(s)
- Rémi Fay
- Centre d'Etudes Biologiques de Chizé UMR 7372 CNRS/Univ La Rochelle 79360 Villiers-en-Bois France
| | - Christophe Barbraud
- Centre d'Etudes Biologiques de Chizé UMR 7372 CNRS/Univ La Rochelle 79360 Villiers-en-Bois France
| | - Karine Delord
- Centre d'Etudes Biologiques de Chizé UMR 7372 CNRS/Univ La Rochelle 79360 Villiers-en-Bois France
| | - Henri Weimerskirch
- Centre d'Etudes Biologiques de Chizé UMR 7372 CNRS/Univ La Rochelle 79360 Villiers-en-Bois France
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20
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Richard Q, Toïgo C, Appolinaire J, Loison A, Garel M. From gestation to weaning: Combining robust design and multi‐event models unveils cost of lactation in a large herbivore. J Anim Ecol 2017; 86:1497-1509. [DOI: 10.1111/1365-2656.12736] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2016] [Accepted: 03/23/2017] [Indexed: 11/30/2022]
Affiliation(s)
- Quentin Richard
- Office National de la Chasse et de la Faune SauvageUnité Faune de Montagne Gières France
| | - Carole Toïgo
- Office National de la Chasse et de la Faune SauvageUnité Faune de Montagne Gières France
| | - Joël Appolinaire
- Office National de la Chasse et de la Faune SauvageUnité Faune de Montagne Gières France
| | - Anne Loison
- Laboratoire d’Écologie AlpineCNRS UMR5553Université de Savoie Le Bourget‐du‐Lac France
| | - Mathieu Garel
- Office National de la Chasse et de la Faune SauvageUnité Faune de Montagne Gières France
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21
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Monteith KL, Long RA, Stephenson TR, Bleich VC, Bowyer RT, Lasharr TN. Horn size and nutrition in mountain sheep: Can ewe handle the truth? J Wildl Manage 2017. [DOI: 10.1002/jwmg.21338] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Kevin L. Monteith
- Haub School of Environment and Natural Resources, Wyoming Cooperative Fish and Wildlife Research UnitDepartment of Zoology and Physiology, University of Wyoming 804 East Fremont St. Laramie WY 82072 USA
| | - Ryan A. Long
- Department of Fish and Wildlife SciencesUniversity of Idaho 875 Perimeter Dr., MS 1142 Moscow ID 83844 USA
| | - Thomas R. Stephenson
- Sierra Nevada Bighorn Sheep Recovery ProgramCalifornia Department of Fish and Wildlife 787 North Main Street, Suite 220 Bishop CA 93514 USA
| | - Vernon C. Bleich
- Department of Natural Resources and Environmental ScienceUniversity of Nevada Reno Mail Stop 186, 1664 North Virginia Street Reno NV 89557 USA
| | - R. Terry Bowyer
- Institute of Arctic BiologyUniversity of Alaska Fairbanks Box 757000 Fairbanks AK 99775 USA
| | - Tayler N. Lasharr
- Wyoming Cooperative Fish and Wildlife Research Unit, Department of Zoology and PhysiologyUniversity of Wyoming Dept. 3166, 1000 E. University Ave Laramie WY 82071 USA
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22
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Tidière M, Lemaître JF, Pélabon C, Gimenez O, Gaillard JM. Evolutionary allometry reveals a shift in selection pressure on male horn size. J Evol Biol 2017; 30:1826-1835. [DOI: 10.1111/jeb.13142] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2017] [Revised: 07/04/2017] [Accepted: 07/06/2017] [Indexed: 11/29/2022]
Affiliation(s)
- M. Tidière
- LBBE UMR 5558; CNRS; Université de Lyon; Lyon France
| | | | - C. Pélabon
- Department of Biology; Centre for Biodiversity Dynamics; NTNU; Norwegian University of Science and Technology; Trondheim Norway
| | - O. Gimenez
- CEFE UMR 5175; CNRS; Université de Montpellier, Université Paul-Valéry Montpellier, EPHE; Montpellier Cedex 5 France
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23
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Corlatti L, Storch I, Filli F, Anderwald P. Does selection on horn length of males and females differ in protected and hunted populations of a weakly dimorphic ungulate? Ecol Evol 2017; 7:3713-3723. [PMID: 28616168 PMCID: PMC5468124 DOI: 10.1002/ece3.2963] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2016] [Revised: 03/02/2017] [Accepted: 03/07/2017] [Indexed: 11/25/2022] Open
Abstract
Weaponry in ungulates may be costly to grow and maintain, and different selective pressures in males and females may lead to sex‐biased natural survival. Sexual differences in the relationship between weapon growth and survival may increase under anthropogenic selection through culling, for example because of trophy hunting. Selection on weaponry growth under different scenarios has been largely investigated in males of highly dimorphic ungulates, for which survival costs (either natural or hunting related) are thought to be greatest. Little is known, however, about the survival costs of weaponry in males and females of weakly dimorphic species. We collected information on horn length and age at death/shooting of 407 chamois Rupicapra rupicapra in a protected population and in two hunted populations with different hunting regimes, to explore sexual differences in the selection on early horn growth under contrasting selective pressures. We also investigated the variation of horn growth and body mass in yearling males (n = 688) and females (n = 539) culled in one of the hunted populations over 14 years. The relationship between horn growth and survival showed remarkable sexual differences under different evolutionary scenarios. Within the protected population, under natural selection, we found no significant trade‐off in either males or females. Under anthropogenic pressure, selection on early horn growth of culled individuals showed diametrically opposed sex‐biased patterns, depending on the culling regime and hunters’ preferences. Despite the selective bias between males and females in one of the hunted populations, we did not detect significant sex‐specific differences in the long‐term pattern of early growth. The relationship between early horn growth and natural survival in either sex might suggest stabilizing selection on horn size in chamois. Selection through culling can be strongly sex‐biased also in weakly dimorphic species, depending on hunters’ preferences and hunting regulations, and long‐term data are needed to reveal potential undesirable evolutionary consequences.
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Affiliation(s)
- Luca Corlatti
- Freiburg Institute for Advanced Studies University of Freiburg Freiburg Germany.,Chair of Wildlife Ecology and Management University of Freiburg Freiburg Germany.,Institute of Wildlife Biology and Game Management University of Natural Resources and Life Sciences Vienna Vienna Austria
| | - Ilse Storch
- Chair of Wildlife Ecology and Management University of Freiburg Freiburg Germany
| | - Flurin Filli
- Swiss National Park Chastè Planta-Wildenberg Zernez Switzerland
| | - Pia Anderwald
- Swiss National Park Chastè Planta-Wildenberg Zernez Switzerland
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24
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Douhard M, Pigeon G, Festa-Bianchet M, Coltman DW, Guillemette S, Pelletier F. Environmental and evolutionary effects on horn growth of male bighorn sheep. OIKOS 2017. [DOI: 10.1111/oik.03799] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Mathieu Douhard
- Dépt de biologie et Centre d’Études Nordiques; Univ. de Sherbrooke, Sherbrooke, QC; J1K 2R1 Canada
| | - Gabriel Pigeon
- Dépt de biologie et Centre d’Études Nordiques; Univ. de Sherbrooke, Sherbrooke, QC; J1K 2R1 Canada
| | - Marco Festa-Bianchet
- Dépt de biologie et Centre d’Études Nordiques; Univ. de Sherbrooke, Sherbrooke, QC; J1K 2R1 Canada
| | - David W. Coltman
- Dépt de biologie et Centre d’Études Nordiques; Univ. de Sherbrooke, Sherbrooke, QC; J1K 2R1 Canada
- Dept of Biological Sciences; Univ. of Alberta, Edmonton; AB, T6G 2E9 Canada
| | - Simon Guillemette
- Dépt de biologie et Centre d’Études Nordiques; Univ. de Sherbrooke, Sherbrooke, QC; J1K 2R1 Canada
| | - Fanie Pelletier
- Dépt de biologie et Centre d’Études Nordiques; Univ. de Sherbrooke, Sherbrooke, QC; J1K 2R1 Canada
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25
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Ungerfeld R, Freitas-de-Melo A, Giriboni J, Lacuesta L, Toledano-Díaz A, Santiago-Moreno J. Influence of seasonality and stimulus of oestrous does in bucks' aggressiveness. Behav Processes 2016; 133:1-5. [PMID: 27744086 DOI: 10.1016/j.beproc.2016.10.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2016] [Revised: 09/02/2016] [Accepted: 10/11/2016] [Indexed: 11/26/2022]
Abstract
Aggressiveness is directly related to testosterone concentration, which varies with seasons and in response to female stimulation. The aim was to determine if the frequency and pattern of agonistic interactions between bucks varies seasonally and in response to oestrous female stimulation. In the first study we characterized the pattern of agonistic interactions during feeding throughout a whole year in groups of Iberian ibex bucks; and in the second study, we determined the influence of oestrous does on the frequencies of agonistic behaviours between Gabon bucks in different seasons. In Iberian ibex bucks, the frequency of agonistic behaviours was maximum in summer and testosterone concentration in late autumn. In Gabon bucks, total agonistic interactions increased in bucks stimulated by females in late summer and autumn. In late autumn there were more interactions without physical contact in stimulated than in isolated bucks. Aggressiveness in bucks varied along the year, but the seasonal pattern was related to the context in which behaviours were recorded. Stimulation with oestrous females induced an increase of aggressiveness during the breeding season. At least in the conditions of these studies, testosterone concentrations seemed not to be the main influence on the frequency in which aggressive behaviour was displayed.
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Affiliation(s)
- Rodolfo Ungerfeld
- Departamento de Fisiología, Facultad de Veterinaria, Universidad de la República, Lasplaces 1620, 11600, Montevideo, Uruguay.
| | - Aline Freitas-de-Melo
- Departamento de Biología Molecular y Celular, Facultad de Veterinaria, Universidad de la República, Lasplaces 1620, 11600, Montevideo, Uruguay
| | - Julia Giriboni
- Departamento de Fisiología, Facultad de Veterinaria, Universidad de la República, Lasplaces 1620, 11600, Montevideo, Uruguay
| | - Lorena Lacuesta
- Departamento de Fisiología, Facultad de Veterinaria, Universidad de la República, Lasplaces 1620, 11600, Montevideo, Uruguay
| | - Adolfo Toledano-Díaz
- Departamento de Reproducción Animal, Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA), Av. Puerta de Hierro s/n, 28040 Madrid, Spain
| | - Julián Santiago-Moreno
- Departamento de Reproducción Animal, Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA), Av. Puerta de Hierro s/n, 28040 Madrid, Spain
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26
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Festa‐Bianchet M. When does selective hunting select, how can we tell, and what should we do about it? Mamm Rev 2016. [DOI: 10.1111/mam.12078] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Marco Festa‐Bianchet
- Département de biologie Université de Sherbrooke Sherbrooke Québec J1K 2R1 Canada
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27
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Glazier DS, Clusella-Trullas S, Terblanche JS. Sexual dimorphism and physiological correlates of horn length in a South African isopod crustacean. J Zool (1987) 2016. [DOI: 10.1111/jzo.12338] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- D. S. Glazier
- Department of Biology; Juniata College; Huntingdon PA USA
- Department of Conservation Ecology and Entomology; Centre for Invasion Biology; Stellenbosch University; Stellenbosch South Africa
| | - S. Clusella-Trullas
- Department of Botany and Zoology; Centre for Invasion Biology; Stellenbosch University; Stellenbosch South Africa
| | - J. S. Terblanche
- Department of Conservation Ecology and Entomology; Centre for Invasion Biology; Stellenbosch University; Stellenbosch South Africa
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28
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Douhard M, Festa-Bianchet M, Pelletier F, Gaillard JM, Bonenfanti C. Changes in horn size of Stone's sheep over four decades correlate with trophy hunting pressure. ECOLOGICAL APPLICATIONS : A PUBLICATION OF THE ECOLOGICAL SOCIETY OF AMERICA 2016; 26:309-321. [PMID: 27039527 DOI: 10.1890/14-1461] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Selective harvest may lead to rapid evolutionary change. For large herbivores, trophy hunting removes males with large horns. That artificial selection, operating in opposition to sexual selection, can lead to undesirable consequences for management and conservation. There have been no comparisons of long-term changes in trophy size under contrasting harvest pressures. We analyzed horn measurements of Stone's rams (Ovis dalli stonei) harvested over 37 years in two large regions of British Columbia, Canada, with marked differences in hunting pressure to identify when selective hunting may cause a long-term decrease in horn growth. Under strong selective harvest, horn growth early in life and the number of males harvested declined by 12% and 45%, respectively, over the study period. Horn shape also changed over time: horn length became shorter for a given base circumference, likely because horn base is not a direct target of hunter selection. In contrast, under relatively lower hunting pressure, there were no detectable temporal trends in early horn growth, number of males harvested, or horn length relative to base circumference. Trophy hunting is an important recreational activity and can generate substantial revenues for conservation. By providing a reproductive advantage to males with smaller horns and reducing the availability of desirable trophies, however, excessive harvest may have the undesirable long-term consequences of reducing both the harvest and the horn size of rams. These consequences can be avoided by limiting offtake.
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29
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Corlatti L, Gugiatti A, Imperio S. Horn growth patterns in Alpine chamois. ZOOLOGY 2015; 118:213-9. [PMID: 25869383 DOI: 10.1016/j.zool.2015.01.003] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2014] [Revised: 01/06/2015] [Accepted: 01/22/2015] [Indexed: 11/27/2022]
Abstract
The analysis of horn growth may provide important information about the allocation of metabolic resources to secondary sexual traits. Depending on the selective advantages offered by horn size during intra- and inter-specific interactions, ungulates may show different investment in horn development, and growth variations within species may be influenced by several parameters, such as sex, age, or resource availability. We investigated the horn growth patterns in two hunted populations of Alpine chamois (Rupicapra r. rupicapra) in the Central Italian Alps. We tested the role of individual heterogeneity on the growth pattern and explored the variation in annulus length as a function of different factors (sex, age, hunting location, cohort). We then investigated the mechanisms underlying horn growth trajectories to test for the occurrence of compensatory or recovery growth and their potential differences between sexes and populations. Annulus length varied as a function of sex, age of individuals and, marginally, hunting location; no effect of cohort or individual heterogeneity was detected. Male and female chamois showed compensatory horn growth within the first 5½ years of life, though the partial convergence of horn trajectories in chamois suggests that this mechanisms would best be described as 'recovery growth'. Compensation rates were greater in males than in females, while only compensatory growth rates up to 2½ years of age were different in the two populations. Besides confirming the sex- and age-dependent pattern of horn development, our study suggests that the mechanism of recovery growth supports the hypothesis of horn size as a weakly selected sexual trait in male and female chamois. Furthermore, the greater compensation rates in horn growth shown by male chamois possibly suggest selective effects of hunting on age at first reproduction, while different compensation rates between populations may suggest the occurrence of some plasticity in resource allocation to sexual traits in relation to different environments.
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Affiliation(s)
- Luca Corlatti
- Institute of Wildlife Biology and Game Management, University of Natural Resources and Life Sciences Vienna, Gregor-Mendel-Straße 33, 1180 Vienna, Austria; Research Unit of Behavioural Ecology, Ethology and Wildlife Management, Department of Life Sciences, University of Siena, Via P.A. Mattioli 4, 53100 Siena, Italy.
| | | | - Simona Imperio
- Parco Naturale Regionale dei Monti Simbruini, Via dei Prati 5, 00020 Jenne, Italy
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30
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Willisch CS, Biebach I, Marreros N, Ryser-Degiorgis MP, Neuhaus P. Horn Growth and Reproduction in a Long-Lived Male Mammal: No Compensation for Poor Early-Life Horn Growth. Evol Biol 2014. [DOI: 10.1007/s11692-014-9294-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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31
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Bleu J, Loison A, Toïgo C. Is there a trade-off between horn growth and survival in adult female chamois? Biol J Linn Soc Lond 2014. [DOI: 10.1111/bij.12351] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Josefa Bleu
- CNRS; UMR 5553 Laboratoire d'Écologie Alpine; Université de Savoie; 73376 Le Bourget du Lac France
- Department of Biology, Centre for Biodiversity Dynamics; Norwegian University of Sciences and Technology; 7491 Trondheim Norway
| | - Anne Loison
- CNRS; UMR 5553 Laboratoire d'Écologie Alpine; Université de Savoie; 73376 Le Bourget du Lac France
| | - Carole Toïgo
- Office National de la Chasse et de la Faune Sauvage (ONCFS); ZI Mayencin; 38610 Gières France
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