ParkinsonCanadaV1, PubMed, Corpus, bibRecord, 001317

Predators select against high growth rates and risk-taking behaviour in domestic trout populations.

Identifieur interne : 001317 ( PubMed/Corpus ); précédent : 001316; suivant : 001318

Predators select against high growth rates and risk-taking behaviour in domestic trout populations.

Auteurs : Peter A. Biro ; Mark V. Abrahams ; John R. Post ; Eric A. Parkinson

Source :

Proceedings. Biological sciences [ 0962-8452 ] ; 2004.

RBID : pubmed:15539348

English descriptors

KwdEn :
- Animals, Animals, Domestic (growth & development), Animals, Domestic (physiology), British Columbia, Environment, Feeding Behavior (physiology), Linear Models, Oncorhynchus mykiss (growth & development), Oncorhynchus mykiss (physiology), Population Dynamics, Predatory Behavior, Risk-Taking.
MESH :
- geographic : British Columbia.
- growth & development : Animals, Domestic, Oncorhynchus mykiss.
- physiology : Animals, Domestic, Feeding Behavior, Oncorhynchus mykiss.
- Animals, Environment, Linear Models, Population Dynamics, Predatory Behavior, Risk-Taking.

Abstract

Domesticated (farm) salmonid fishes display an increased willingness to accept risk while foraging, and achieve high growth rates not observed in nature. Theory predicts that elevated growth rates in domestic salmonids will result in greater risk-taking to access abundant food, but low survival in the presence of predators. In replicated whole-lake experiments, we observed that domestic trout (selected for high growth rates) took greater risks while foraging and grew faster than a wild strain. However, survival consequences for greater growth rates depended upon the predation environment. Domestic trout experienced greater survival when risk was low, but lower survival when risk was high. This suggests that animals with high intrinsic growth rates are selected against in populations with abundant predators, explaining the absence of such phenotypes in nature. This is, to our knowledge, the first large-scale field experiment to directly test this theory and simultaneously quantify the initial invasibility of domestic salmonid strains that escape into the wild from aquaculture operations, and the ecological conditions affecting their survival.

DOI: 10.1098/rspb.2004.2861
PubMed: 15539348

Links to Exploration step

pubmed:15539348

Le document en format XML

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<author><name sortKey="Biro, Peter A" sort="Biro, Peter A" uniqKey="Biro P" first="Peter A" last="Biro">Peter A. Biro</name>
<affiliation><nlm:affiliation>Department of Zoology, University of Manitoba, Winnipeg, Manitoba R3T 2N2, Canada.</nlm:affiliation>
</affiliation>
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<author><name sortKey="Abrahams, Mark V" sort="Abrahams, Mark V" uniqKey="Abrahams M" first="Mark V" last="Abrahams">Mark V. Abrahams</name>
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<author><name sortKey="Post, John R" sort="Post, John R" uniqKey="Post J" first="John R" last="Post">John R. Post</name>
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<author><name sortKey="Parkinson, Eric A" sort="Parkinson, Eric A" uniqKey="Parkinson E" first="Eric A" last="Parkinson">Eric A. Parkinson</name>
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<author><name sortKey="Post, John R" sort="Post, John R" uniqKey="Post J" first="John R" last="Post">John R. Post</name>
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<term>British Columbia</term>
<term>Environment</term>
<term>Feeding Behavior (physiology)</term>
<term>Linear Models</term>
<term>Oncorhynchus mykiss (growth & development)</term>
<term>Oncorhynchus mykiss (physiology)</term>
<term>Population Dynamics</term>
<term>Predatory Behavior</term>
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<front><div type="abstract" xml:lang="en">Domesticated (farm) salmonid fishes display an increased willingness to accept risk while foraging, and achieve high growth rates not observed in nature. Theory predicts that elevated growth rates in domestic salmonids will result in greater risk-taking to access abundant food, but low survival in the presence of predators. In replicated whole-lake experiments, we observed that domestic trout (selected for high growth rates) took greater risks while foraging and grew faster than a wild strain. However, survival consequences for greater growth rates depended upon the predation environment. Domestic trout experienced greater survival when risk was low, but lower survival when risk was high. This suggests that animals with high intrinsic growth rates are selected against in populations with abundant predators, explaining the absence of such phenotypes in nature. This is, to our knowledge, the first large-scale field experiment to directly test this theory and simultaneously quantify the initial invasibility of domestic salmonid strains that escape into the wild from aquaculture operations, and the ecological conditions affecting their survival.</div>
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<Title>Proceedings. Biological sciences</Title>
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<Abstract><AbstractText>Domesticated (farm) salmonid fishes display an increased willingness to accept risk while foraging, and achieve high growth rates not observed in nature. Theory predicts that elevated growth rates in domestic salmonids will result in greater risk-taking to access abundant food, but low survival in the presence of predators. In replicated whole-lake experiments, we observed that domestic trout (selected for high growth rates) took greater risks while foraging and grew faster than a wild strain. However, survival consequences for greater growth rates depended upon the predation environment. Domestic trout experienced greater survival when risk was low, but lower survival when risk was high. This suggests that animals with high intrinsic growth rates are selected against in populations with abundant predators, explaining the absence of such phenotypes in nature. This is, to our knowledge, the first large-scale field experiment to directly test this theory and simultaneously quantify the initial invasibility of domestic salmonid strains that escape into the wild from aquaculture operations, and the ecological conditions affecting their survival.</AbstractText>
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<CommentsCorrectionsList><CommentsCorrections RefType="Cites"><RefSource>Proc Biol Sci. 2000 Aug 7;267(1452):1517-23</RefSource>
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<CommentsCorrections RefType="Cites"><RefSource>Nature. 2001 Feb 15;409(6822):781-2</RefSource>
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<MeshHeading><DescriptorName UI="D012309" MajorTopicYN="Y">Risk-Taking</DescriptorName>
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Predators select against high growth rates and risk-taking behaviour in domestic trout populations.

Predators select against high growth rates and risk-taking behaviour in domestic trout populations.

Source :

English descriptors

Abstract

Links to Exploration step

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri

Pour générer des pages wiki