Predators select against high growth rates and risk-taking behaviour in domestic trout populations
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 t...
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ftdeakinunifig:oai:figshare.com:article/20979613 2023-05-15T15:32:30+02:00 Predators select against high growth rates and risk-taking behaviour in domestic trout populations Peter Biro M Abrahams J Post E Parkinson 2004-11-07T00:00:00Z http://hdl.handle.net/10536/DRO/DU:30047908 https://figshare.com/articles/journal_contribution/Predators_select_against_high_growth_rates_and_risk-taking_behaviour_in_domestic_trout_populations/20979613 unknown http://hdl.handle.net/10536/DRO/DU:30047908 https://figshare.com/articles/journal_contribution/Predators_select_against_high_growth_rates_and_risk-taking_behaviour_in_domestic_trout_populations/20979613 All Rights Reserved Uncategorized behaviour domestic growth-mortality trade-off invasion predation risk-taking Science & Technology Life Sciences & Biomedicine Biology Ecology Evolutionary Biology Life Sciences & Biomedicine - Other Topics Environmental Sciences & Ecology ATLANTIC SALMON FOOD AVAILABILITY PREY FISH TRADE-OFF MORTALITY CONSEQUENCES WILD SIZE FITNESS SALAR Text Journal contribution 2004 ftdeakinunifig 2022-11-17T22:05:56Z 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. Other Non-Article Part of Journal/Newspaper Atlantic salmon DRO - Deakin Research Online |
institution |
Open Polar |
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DRO - Deakin Research Online |
op_collection_id |
ftdeakinunifig |
language |
unknown |
topic |
Uncategorized behaviour domestic growth-mortality trade-off invasion predation risk-taking Science & Technology Life Sciences & Biomedicine Biology Ecology Evolutionary Biology Life Sciences & Biomedicine - Other Topics Environmental Sciences & Ecology ATLANTIC SALMON FOOD AVAILABILITY PREY FISH TRADE-OFF MORTALITY CONSEQUENCES WILD SIZE FITNESS SALAR |
spellingShingle |
Uncategorized behaviour domestic growth-mortality trade-off invasion predation risk-taking Science & Technology Life Sciences & Biomedicine Biology Ecology Evolutionary Biology Life Sciences & Biomedicine - Other Topics Environmental Sciences & Ecology ATLANTIC SALMON FOOD AVAILABILITY PREY FISH TRADE-OFF MORTALITY CONSEQUENCES WILD SIZE FITNESS SALAR Peter Biro M Abrahams J Post E Parkinson Predators select against high growth rates and risk-taking behaviour in domestic trout populations |
topic_facet |
Uncategorized behaviour domestic growth-mortality trade-off invasion predation risk-taking Science & Technology Life Sciences & Biomedicine Biology Ecology Evolutionary Biology Life Sciences & Biomedicine - Other Topics Environmental Sciences & Ecology ATLANTIC SALMON FOOD AVAILABILITY PREY FISH TRADE-OFF MORTALITY CONSEQUENCES WILD SIZE FITNESS SALAR |
description |
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. |
format |
Other Non-Article Part of Journal/Newspaper |
author |
Peter Biro M Abrahams J Post E Parkinson |
author_facet |
Peter Biro M Abrahams J Post E Parkinson |
author_sort |
Peter Biro |
title |
Predators select against high growth rates and risk-taking behaviour in domestic trout populations |
title_short |
Predators select against high growth rates and risk-taking behaviour in domestic trout populations |
title_full |
Predators select against high growth rates and risk-taking behaviour in domestic trout populations |
title_fullStr |
Predators select against high growth rates and risk-taking behaviour in domestic trout populations |
title_full_unstemmed |
Predators select against high growth rates and risk-taking behaviour in domestic trout populations |
title_sort |
predators select against high growth rates and risk-taking behaviour in domestic trout populations |
publishDate |
2004 |
url |
http://hdl.handle.net/10536/DRO/DU:30047908 https://figshare.com/articles/journal_contribution/Predators_select_against_high_growth_rates_and_risk-taking_behaviour_in_domestic_trout_populations/20979613 |
genre |
Atlantic salmon |
genre_facet |
Atlantic salmon |
op_relation |
http://hdl.handle.net/10536/DRO/DU:30047908 https://figshare.com/articles/journal_contribution/Predators_select_against_high_growth_rates_and_risk-taking_behaviour_in_domestic_trout_populations/20979613 |
op_rights |
All Rights Reserved |
_version_ |
1766362996489060352 |