Data from: Stocking activities for the Arctic charr in Lake Geneva: genetic effects in space and time
Artificial stocking practices are widely used by resource managers worldwide, in order to sustain fish populations exploited by both recreational and commercial activities, but their benefits are controversial. Former practices involved exotic strains, although current programs rather consider artif...
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ftzenodo:oai:zenodo.org:4936358 2024-09-15T17:52:24+00:00 Data from: Stocking activities for the Arctic charr in Lake Geneva: genetic effects in space and time Savary, Romain Dufresnes, Christophe Champigneulle, Alexis Caudron, Arnaud Dubey, Sylvain Perrin, Nicolas Fumagalli, Luca 2018-05-30 https://doi.org/10.5061/dryad.f776h unknown Zenodo https://doi.org/10.1002/ece3.3073 https://zenodo.org/communities/dryad https://doi.org/10.5061/dryad.f776h oai:zenodo.org:4936358 info:eu-repo/semantics/openAccess Creative Commons Zero v1.0 Universal https://creativecommons.org/publicdomain/zero/1.0/legalcode genetic bottleneck historical DNA Salvelinus conservation-based stocking programs Salvelinus alpinus Genetic integrity info:eu-repo/semantics/other 2018 ftzenodo https://doi.org/10.5061/dryad.f776h10.1002/ece3.3073 2024-07-26T06:08:44Z Artificial stocking practices are widely used by resource managers worldwide, in order to sustain fish populations exploited by both recreational and commercial activities, but their benefits are controversial. Former practices involved exotic strains, although current programs rather consider artificial breeding of local fishes (supportive breeding). Understanding the complex genetic effects of these management strategies is an important challenge with economic and conservation implications, especially in the context of population declines. In the present study, we focus on the declining Arctic charr (Salvelinus alpinus) population from Lake Geneva (Switzerland and France), which has initially been restocked with allochtonous fishes in the early eighties, followed by supportive breeding. In this context, we conducted a genetic survey to document the evolution of the genetic diversity and structure throughout the last 50 years, before and after the initiation of hatchery supplementation, using contemporary and historical samples. We show that the introduction of exotic fishes was associated with a genetic bottleneck in the 1980-1990s, a break of Hardy-Weinberg Equilibrium (HWE), a reduction of genetic diversity, an increase of genetic structure among spawning sites, and a change in their genetic composition. Together with better environmental conditions, three decades of subsequent supportive breeding using local fishes allowed to re-establish HWE and the initial levels of genetic variation. However, current spawning sites have not fully recovered their original genetic composition and were extensively homogenized across the lake. Our study demonstrates the drastic genetic consequences of different restocking tactics in a comprehensive spatio-temporal framework, and suggests that genetic alteration by non-local stocking may be partly reversible through supportive breeding. We recommend that conservation-based programs consider local diversity and implement adequate protocols to limit the genetic homogenization ... Other/Unknown Material Arctic charr Salvelinus alpinus Zenodo |
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language |
unknown |
topic |
genetic bottleneck historical DNA Salvelinus conservation-based stocking programs Salvelinus alpinus Genetic integrity |
spellingShingle |
genetic bottleneck historical DNA Salvelinus conservation-based stocking programs Salvelinus alpinus Genetic integrity Savary, Romain Dufresnes, Christophe Champigneulle, Alexis Caudron, Arnaud Dubey, Sylvain Perrin, Nicolas Fumagalli, Luca Data from: Stocking activities for the Arctic charr in Lake Geneva: genetic effects in space and time |
topic_facet |
genetic bottleneck historical DNA Salvelinus conservation-based stocking programs Salvelinus alpinus Genetic integrity |
description |
Artificial stocking practices are widely used by resource managers worldwide, in order to sustain fish populations exploited by both recreational and commercial activities, but their benefits are controversial. Former practices involved exotic strains, although current programs rather consider artificial breeding of local fishes (supportive breeding). Understanding the complex genetic effects of these management strategies is an important challenge with economic and conservation implications, especially in the context of population declines. In the present study, we focus on the declining Arctic charr (Salvelinus alpinus) population from Lake Geneva (Switzerland and France), which has initially been restocked with allochtonous fishes in the early eighties, followed by supportive breeding. In this context, we conducted a genetic survey to document the evolution of the genetic diversity and structure throughout the last 50 years, before and after the initiation of hatchery supplementation, using contemporary and historical samples. We show that the introduction of exotic fishes was associated with a genetic bottleneck in the 1980-1990s, a break of Hardy-Weinberg Equilibrium (HWE), a reduction of genetic diversity, an increase of genetic structure among spawning sites, and a change in their genetic composition. Together with better environmental conditions, three decades of subsequent supportive breeding using local fishes allowed to re-establish HWE and the initial levels of genetic variation. However, current spawning sites have not fully recovered their original genetic composition and were extensively homogenized across the lake. Our study demonstrates the drastic genetic consequences of different restocking tactics in a comprehensive spatio-temporal framework, and suggests that genetic alteration by non-local stocking may be partly reversible through supportive breeding. We recommend that conservation-based programs consider local diversity and implement adequate protocols to limit the genetic homogenization ... |
format |
Other/Unknown Material |
author |
Savary, Romain Dufresnes, Christophe Champigneulle, Alexis Caudron, Arnaud Dubey, Sylvain Perrin, Nicolas Fumagalli, Luca |
author_facet |
Savary, Romain Dufresnes, Christophe Champigneulle, Alexis Caudron, Arnaud Dubey, Sylvain Perrin, Nicolas Fumagalli, Luca |
author_sort |
Savary, Romain |
title |
Data from: Stocking activities for the Arctic charr in Lake Geneva: genetic effects in space and time |
title_short |
Data from: Stocking activities for the Arctic charr in Lake Geneva: genetic effects in space and time |
title_full |
Data from: Stocking activities for the Arctic charr in Lake Geneva: genetic effects in space and time |
title_fullStr |
Data from: Stocking activities for the Arctic charr in Lake Geneva: genetic effects in space and time |
title_full_unstemmed |
Data from: Stocking activities for the Arctic charr in Lake Geneva: genetic effects in space and time |
title_sort |
data from: stocking activities for the arctic charr in lake geneva: genetic effects in space and time |
publisher |
Zenodo |
publishDate |
2018 |
url |
https://doi.org/10.5061/dryad.f776h |
genre |
Arctic charr Salvelinus alpinus |
genre_facet |
Arctic charr Salvelinus alpinus |
op_relation |
https://doi.org/10.1002/ece3.3073 https://zenodo.org/communities/dryad https://doi.org/10.5061/dryad.f776h oai:zenodo.org:4936358 |
op_rights |
info:eu-repo/semantics/openAccess Creative Commons Zero v1.0 Universal https://creativecommons.org/publicdomain/zero/1.0/legalcode |
op_doi |
https://doi.org/10.5061/dryad.f776h10.1002/ece3.3073 |
_version_ |
1810294439585775616 |