Restoration of Native Biodiversity in Altered Environments: Reintroduction of Atlantic salmon into Lake Ontario
Less than a quarter of reintroduction programs have succeeded in re-establishing a self-sustaining population of an extirpated species. Optimal source population selection, based on an evolutionary perspective, could increase the fitness of translocated individuals, thereby improving the success rat...
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ftunivwestonta:oai:ir.lib.uwo.ca:etd-4283 2023-10-01T03:54:44+02:00 Restoration of Native Biodiversity in Altered Environments: Reintroduction of Atlantic salmon into Lake Ontario Houde, Aimee Lee S 2015-05-25T07:00:00Z application/pdf https://ir.lib.uwo.ca/etd/2861 https://ir.lib.uwo.ca/context/etd/article/4283/viewcontent/Houde_revised.pdf English eng Scholarship@Western https://ir.lib.uwo.ca/etd/2861 https://ir.lib.uwo.ca/context/etd/article/4283/viewcontent/Houde_revised.pdf Electronic Thesis and Dissertation Repository interspecific competition multi-species competition microhabitat use thiaminase thiamine deficiency genetic architecture Ecology and Evolutionary Biology text 2015 ftunivwestonta 2023-09-03T07:23:32Z Less than a quarter of reintroduction programs have succeeded in re-establishing a self-sustaining population of an extirpated species. Optimal source population selection, based on an evolutionary perspective, could increase the fitness of translocated individuals, thereby improving the success rate of restoring extirpated populations. Here, using three source populations of Atlantic salmon, Salmo salar (LaHave River, Sebago Lake, and Lac Saint-Jean), that are being used for reintroduction efforts into Lake Ontario, I examined two optimal source population selection approaches: environment matching and adaptive potential. For environment matching, source populations from locations containing similar key environment features as the reintroduction location should contain adaptations to these features. For adaptive potential, source populations with high heritable genetic variation should have the potential to adapt to new selection pressures, such as the key environment features in the reintroduction location. I tested environment matching using experimental settings by exposing the three source populations to two key environment features that are likely impediments to a successful reintroduction of Atlantic salmon into Lake Ontario: the presence of non-native salmonids and a high thiaminase diet that can lead to a thiamine (vitamin B1) deficiency. I also quantified the amount of within-population heritable (additive) genetic variation for early-life history traits to assess the adaptive potential of the source populations. Although the average amount of heritable genetic variation was the highest for early-life history traits of the Sebago population, the amount was low, suggesting that the traits have a limited potential to adapt to any new selection pressures in Lake Ontario. Overall, the Sebago population (a match to both key environment features) had the highest performance, followed by the Saint-Jean population (match to a high thiaminase diet but not non-native salmonids), and finally the LaHave population ... Text Atlantic salmon Salmo salar The University of Western Ontario: Scholarship@Western |
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The University of Western Ontario: Scholarship@Western |
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ftunivwestonta |
language |
English |
topic |
interspecific competition multi-species competition microhabitat use thiaminase thiamine deficiency genetic architecture Ecology and Evolutionary Biology |
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interspecific competition multi-species competition microhabitat use thiaminase thiamine deficiency genetic architecture Ecology and Evolutionary Biology Houde, Aimee Lee S Restoration of Native Biodiversity in Altered Environments: Reintroduction of Atlantic salmon into Lake Ontario |
topic_facet |
interspecific competition multi-species competition microhabitat use thiaminase thiamine deficiency genetic architecture Ecology and Evolutionary Biology |
description |
Less than a quarter of reintroduction programs have succeeded in re-establishing a self-sustaining population of an extirpated species. Optimal source population selection, based on an evolutionary perspective, could increase the fitness of translocated individuals, thereby improving the success rate of restoring extirpated populations. Here, using three source populations of Atlantic salmon, Salmo salar (LaHave River, Sebago Lake, and Lac Saint-Jean), that are being used for reintroduction efforts into Lake Ontario, I examined two optimal source population selection approaches: environment matching and adaptive potential. For environment matching, source populations from locations containing similar key environment features as the reintroduction location should contain adaptations to these features. For adaptive potential, source populations with high heritable genetic variation should have the potential to adapt to new selection pressures, such as the key environment features in the reintroduction location. I tested environment matching using experimental settings by exposing the three source populations to two key environment features that are likely impediments to a successful reintroduction of Atlantic salmon into Lake Ontario: the presence of non-native salmonids and a high thiaminase diet that can lead to a thiamine (vitamin B1) deficiency. I also quantified the amount of within-population heritable (additive) genetic variation for early-life history traits to assess the adaptive potential of the source populations. Although the average amount of heritable genetic variation was the highest for early-life history traits of the Sebago population, the amount was low, suggesting that the traits have a limited potential to adapt to any new selection pressures in Lake Ontario. Overall, the Sebago population (a match to both key environment features) had the highest performance, followed by the Saint-Jean population (match to a high thiaminase diet but not non-native salmonids), and finally the LaHave population ... |
format |
Text |
author |
Houde, Aimee Lee S |
author_facet |
Houde, Aimee Lee S |
author_sort |
Houde, Aimee Lee S |
title |
Restoration of Native Biodiversity in Altered Environments: Reintroduction of Atlantic salmon into Lake Ontario |
title_short |
Restoration of Native Biodiversity in Altered Environments: Reintroduction of Atlantic salmon into Lake Ontario |
title_full |
Restoration of Native Biodiversity in Altered Environments: Reintroduction of Atlantic salmon into Lake Ontario |
title_fullStr |
Restoration of Native Biodiversity in Altered Environments: Reintroduction of Atlantic salmon into Lake Ontario |
title_full_unstemmed |
Restoration of Native Biodiversity in Altered Environments: Reintroduction of Atlantic salmon into Lake Ontario |
title_sort |
restoration of native biodiversity in altered environments: reintroduction of atlantic salmon into lake ontario |
publisher |
Scholarship@Western |
publishDate |
2015 |
url |
https://ir.lib.uwo.ca/etd/2861 https://ir.lib.uwo.ca/context/etd/article/4283/viewcontent/Houde_revised.pdf |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
Electronic Thesis and Dissertation Repository |
op_relation |
https://ir.lib.uwo.ca/etd/2861 https://ir.lib.uwo.ca/context/etd/article/4283/viewcontent/Houde_revised.pdf |
_version_ |
1778522630892027904 |