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Predation risk and the evolution of a vertebrate stress response : Parallel evolution of stress reactivity and sexual dimorphism
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- Vinterstare, Jerker (författare)
- Lund University,Lunds universitet,Enhet akvatisk ekologi,Biologiska institutionen,Naturvetenskapliga fakulteten,Akvatisk ekologi,Forskargrupper vid Lunds universitet,Division aquatic ecology,Department of Biology,Faculty of Science,Aquatic Ecology,Lund University Research Groups,Lund Univ, Dept Biol, Aquat Ecol Unit, Ecol Bldg, SE-22362 Lund, Sweden.
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- Ekelund Ugge, Gustaf Magnus Oskar (författare)
- University of Skövde,Lund University,Lunds universitet,Högskolan i Skövde,Institutionen för biovetenskap,Forskningsmiljön Systembiologi,Aquatic Ecology Unit, Ecology Building, Department of Biology, Lund University, Sweden,Ekologisk modellering, Ecological Modeling,Enhet akvatisk ekologi,Biologiska institutionen,Naturvetenskapliga fakulteten,Division aquatic ecology,Department of Biology,Faculty of Science,Lund Univ, Dept Biol, Aquat Ecol Unit, Ecol Bldg, SE-22362 Lund, Sweden.;Univ Skövde, Sch Biosci, Skövde, Sweden.
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- Hulthén, Kaj (författare)
- Lund University,Lunds universitet,Enhet akvatisk ekologi,Biologiska institutionen,Naturvetenskapliga fakulteten,Akvatisk ekologi,Forskargrupper vid Lunds universitet,Division aquatic ecology,Department of Biology,Faculty of Science,Aquatic Ecology,Lund University Research Groups,Lund Univ, Dept Biol, Aquat Ecol Unit, Ecol Bldg, SE-22362 Lund, Sweden.
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- (creator_code:org_t)
- 2021-09-12
- 2021
- Engelska.
- Ingår i: Journal of Evolutionary Biology. - : John Wiley & Sons. - 1010-061X .- 1420-9101. ; 34:10, s. 1554-1567
- Tidskriftsartikel (refereegranskat)
Abstract
Ämnesord
Stäng
- Predation risk is often invoked to explain variation in stress responses. Yet, the answers to several key questions remain elusive, including the following: (1) how predation risk influences the evolution of stress phenotypes, (2) the relative importance of environmental versus genetic factors in stress reactivity and (3) sexual dimorphism in stress physiology. To address these questions, we explored variation in stress reactivity (ventilation frequency) in a post-Pleistocene radiation of live-bearing fish, where Bahamas mosquitofish (Gambusia hubbsi) inhabit isolated blue holes that differ in predation risk. Individuals of populations coexisting with predators exhibited similar, relatively low stress reactivity as compared to low-predation populations. We suggest that this dampened stress reactivity has evolved to reduce energy expenditure in environments with frequent and intense stressors, such as piscivorous fish. Importantly, the magnitude of stress responses exhibited by fish from high-predation sites in the wild changed very little after two generations of laboratory rearing in the absence of predators. By comparison, low-predation populations exhibited greater among-population variation and larger changes subsequent to laboratory rearing. These low-predation populations appear to have evolved more dampened stress responses in blue holes with lower food availability. Moreover, females showed a lower ventilation frequency, and this sexual dimorphism was stronger in high-predation populations. This may reflect a greater premium placed on energy efficiency in live-bearing females, especially under high-predation risk where females show higher fecundities. Altogether, by demonstrating parallel adaptive divergence in stress reactivity, we highlight how energetic trade-offs may mould the evolution of the vertebrate stress response under varying predation risk and resource availability.
Ämnesord
- NATURVETENSKAP -- Biologi -- Ekologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Ecology (hsv//eng)
- NATURVETENSKAP -- Biologi -- Evolutionsbiologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Evolutionary Biology (hsv//eng)
Nyckelord
- bahamas mosquitofish
- poeciliidae
- predation risk
- predator-prey interactions
- resource availability
- sexual dimorphism
- stress physiology
- stress response
- trade-offs
- ventilation frequency
- Ekologisk modellering
- Ecological Modelling Group
- bahamas mosquitofish
- poeciliidae
- predation risk
- predator-prey interactions
- resource availability
- sexual dimorphism
- stress physiology
- stress response
- trade-offs
- ventilation frequency
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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