Behavioural trade-offs between growth and mortality explain evolution of submaximal growth rates.
Identifieur interne : 002753 ( Main/Exploration ); précédent : 002752; suivant : 002754Behavioural trade-offs between growth and mortality explain evolution of submaximal growth rates.
Auteurs : Peter A. Biro [Canada] ; Mark V. Abrahams ; John R. Post ; Eric A. ParkinsonSource :
- The Journal of animal ecology [ 0021-8790 ] ; 2006.
English descriptors
- KwdEn :
- Animals, Animals, Domestic (growth & development), Animals, Domestic (physiology), Animals, Wild (growth & development), Animals, Wild (physiology), Behavior, Animal (physiology), Biological Evolution, Body Size (physiology), Ecosystem, Mortality, Oncorhynchus mykiss (growth & development), Oncorhynchus mykiss (physiology), Risk-Taking, Survival Analysis, Time Factors.
- MESH :
- growth & development : Animals, Domestic, Animals, Wild, Oncorhynchus mykiss.
- physiology : Animals, Domestic, Animals, Wild, Behavior, Animal, Body Size, Oncorhynchus mykiss.
- Animals, Biological Evolution, Ecosystem, Mortality, Risk-Taking, Survival Analysis, Time Factors.
Abstract
1. The importance of body size and growth rate in ecological interactions is widely recognized, and both are frequently used as surrogates for fitness. However, if there are significant costs associated with rapid growth rates then its fitness benefits may be questioned. 2. In replicated whole-lake experiments, we show that a domestic strain of rainbow trout (artificially selected for maximum intrinsic growth rate) use productive but risky habitats more than wild trout. Consequently, domestic trout grow faster in all situations, experience greater survival in the absence of predators, but have lower survival in the presence of predators. Therefore, rapid growth rates are selected against due to increased foraging effort (or conversely, lower antipredator behaviour) that increases vulnerability to predators. In other words, there is a behaviourally mediated trade-off between growth and mortality rates. 3. Whereas rapid growth is beneficial in many ecological interactions, our results show the mortality costs of achieving it are large in the presence of predators, which can help explain the absence of an average phenotype with maximized growth rates in nature.
DOI: 10.1111/j.1365-2656.2006.01137.x
PubMed: 16922852
Affiliations:
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Le document en format XML
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Abrahams</name></author><author><name sortKey="Post, John R" sort="Post, John R" uniqKey="Post J" first="John R" last="Post">John R. Post</name></author><author><name sortKey="Parkinson, Eric A" sort="Parkinson, Eric A" uniqKey="Parkinson E" first="Eric A" last="Parkinson">Eric A. 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Biro</name><affiliation wicri:level="4"><nlm:affiliation>Department of Zoology, University of Manitoba, Winnipeg, Canada. peter.biro@uts.edu.au</nlm:affiliation><country xml:lang="fr">Canada</country><wicri:regionArea>Department of Zoology, University of Manitoba, Winnipeg</wicri:regionArea><orgName type="university">Université du Manitoba</orgName><placeName><settlement type="city">Winnipeg</settlement><region type="state">Manitoba</region></placeName></affiliation></author><author><name sortKey="Abrahams, Mark V" sort="Abrahams, Mark V" uniqKey="Abrahams M" first="Mark V" last="Abrahams">Mark V. Abrahams</name></author><author><name sortKey="Post, John R" sort="Post, John R" uniqKey="Post J" first="John R" last="Post">John R. Post</name></author><author><name sortKey="Parkinson, Eric A" sort="Parkinson, Eric A" uniqKey="Parkinson E" first="Eric A" last="Parkinson">Eric A. Parkinson</name></author></analytic><series><title level="j">The Journal of animal ecology</title><idno type="ISSN">0021-8790</idno><imprint><date when="2006" type="published">2006</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Animals</term><term>Animals, Domestic (growth & development)</term><term>Animals, Domestic (physiology)</term><term>Animals, Wild (growth & development)</term><term>Animals, Wild (physiology)</term><term>Behavior, Animal (physiology)</term><term>Biological Evolution</term><term>Body Size (physiology)</term><term>Ecosystem</term><term>Mortality</term><term>Oncorhynchus mykiss (growth & development)</term><term>Oncorhynchus mykiss (physiology)</term><term>Risk-Taking</term><term>Survival Analysis</term><term>Time Factors</term></keywords><keywords scheme="MESH" qualifier="growth & development" xml:lang="en"><term>Animals, Domestic</term><term>Animals, Wild</term><term>Oncorhynchus mykiss</term></keywords><keywords scheme="MESH" qualifier="physiology" xml:lang="en"><term>Animals, Domestic</term><term>Animals, Wild</term><term>Behavior, Animal</term><term>Body Size</term><term>Oncorhynchus mykiss</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Animals</term><term>Biological Evolution</term><term>Ecosystem</term><term>Mortality</term><term>Risk-Taking</term><term>Survival Analysis</term><term>Time Factors</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">1. The importance of body size and growth rate in ecological interactions is widely recognized, and both are frequently used as surrogates for fitness. However, if there are significant costs associated with rapid growth rates then its fitness benefits may be questioned. 2. In replicated whole-lake experiments, we show that a domestic strain of rainbow trout (artificially selected for maximum intrinsic growth rate) use productive but risky habitats more than wild trout. Consequently, domestic trout grow faster in all situations, experience greater survival in the absence of predators, but have lower survival in the presence of predators. Therefore, rapid growth rates are selected against due to increased foraging effort (or conversely, lower antipredator behaviour) that increases vulnerability to predators. In other words, there is a behaviourally mediated trade-off between growth and mortality rates. 3. Whereas rapid growth is beneficial in many ecological interactions, our results show the mortality costs of achieving it are large in the presence of predators, which can help explain the absence of an average phenotype with maximized growth rates in nature.</div></front></TEI><affiliations><list><country><li>Canada</li></country><region><li>Manitoba</li></region><settlement><li>Winnipeg</li></settlement><orgName><li>Université du Manitoba</li></orgName></list><tree><noCountry><name sortKey="Abrahams, Mark V" sort="Abrahams, Mark V" uniqKey="Abrahams M" first="Mark V" last="Abrahams">Mark V. Abrahams</name><name sortKey="Parkinson, Eric A" sort="Parkinson, Eric A" uniqKey="Parkinson E" first="Eric A" last="Parkinson">Eric A. Parkinson</name><name sortKey="Post, John R" sort="Post, John R" uniqKey="Post J" first="John R" last="Post">John R. Post</name></noCountry><country name="Canada"><region name="Manitoba"><name sortKey="Biro, Peter A" sort="Biro, Peter A" uniqKey="Biro P" first="Peter A" last="Biro">Peter A. Biro</name></region></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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