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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Online Access: | https://eprints.whiterose.ac.uk/127079/ https://eprints.whiterose.ac.uk/127079/1/Stocking%20activities%20for%20the%20Arctic%20charr%20in%20Lake%20Geneva%3A%20Genetic%20effects%20in%20space%20and%20time.pdf https://doi.org/10.1002/ece3.3073 |
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ftleedsuniv:oai:eprints.whiterose.ac.uk:127079 2023-05-15T14:26:08+02:00 Stocking activities for the Arctic charr in Lake Geneva: Genetic effects in space and time Savary, R. Dufresnes, C. Champigneulle, A. Caudron, A. Dubey, S. Perrin, N. Fumagalli, L. 2017-07 text https://eprints.whiterose.ac.uk/127079/ https://eprints.whiterose.ac.uk/127079/1/Stocking%20activities%20for%20the%20Arctic%20charr%20in%20Lake%20Geneva%3A%20Genetic%20effects%20in%20space%20and%20time.pdf https://doi.org/10.1002/ece3.3073 en eng Wiley https://eprints.whiterose.ac.uk/127079/1/Stocking%20activities%20for%20the%20Arctic%20charr%20in%20Lake%20Geneva%3A%20Genetic%20effects%20in%20space%20and%20time.pdf Savary, R., Dufresnes, C., Champigneulle, A. et al. (4 more authors) (2017) Stocking activities for the Arctic charr in Lake Geneva: Genetic effects in space and time. Ecology and Evolution , 7 (14). pp. 5201-5211. cc_by_4 CC-BY Article PeerReviewed 2017 ftleedsuniv https://doi.org/10.1002/ece3.3073 2023-01-30T22:03:27Z 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 importan t challenge with economic and conservation implications, especially in the context of population declines. In this 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 in genetic diversity, an increase in 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 h omogenized across the lake. Our study demonstrates the drastic genetic consequ e nces of different restocking tactics in a comprehensive spatiotemporal framewo rk and suggests that genetic alteration by nonlocal 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 of ... Article in Journal/Newspaper Arctic Arctic charr Arctic Salvelinus alpinus White Rose Research Online (Universities of Leeds, Sheffield & York) Arctic Ecology and Evolution 7 14 5201 5211 |
institution |
Open Polar |
collection |
White Rose Research Online (Universities of Leeds, Sheffield & York) |
op_collection_id |
ftleedsuniv |
language |
English |
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 importan t challenge with economic and conservation implications, especially in the context of population declines. In this 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 in genetic diversity, an increase in 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 h omogenized across the lake. Our study demonstrates the drastic genetic consequ e nces of different restocking tactics in a comprehensive spatiotemporal framewo rk and suggests that genetic alteration by nonlocal 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 of ... |
format |
Article in Journal/Newspaper |
author |
Savary, R. Dufresnes, C. Champigneulle, A. Caudron, A. Dubey, S. Perrin, N. Fumagalli, L. |
spellingShingle |
Savary, R. Dufresnes, C. Champigneulle, A. Caudron, A. Dubey, S. Perrin, N. Fumagalli, L. Stocking activities for the Arctic charr in Lake Geneva: Genetic effects in space and time |
author_facet |
Savary, R. Dufresnes, C. Champigneulle, A. Caudron, A. Dubey, S. Perrin, N. Fumagalli, L. |
author_sort |
Savary, R. |
title |
Stocking activities for the Arctic charr in Lake Geneva: Genetic effects in space and time |
title_short |
Stocking activities for the Arctic charr in Lake Geneva: Genetic effects in space and time |
title_full |
Stocking activities for the Arctic charr in Lake Geneva: Genetic effects in space and time |
title_fullStr |
Stocking activities for the Arctic charr in Lake Geneva: Genetic effects in space and time |
title_full_unstemmed |
Stocking activities for the Arctic charr in Lake Geneva: Genetic effects in space and time |
title_sort |
stocking activities for the arctic charr in lake geneva: genetic effects in space and time |
publisher |
Wiley |
publishDate |
2017 |
url |
https://eprints.whiterose.ac.uk/127079/ https://eprints.whiterose.ac.uk/127079/1/Stocking%20activities%20for%20the%20Arctic%20charr%20in%20Lake%20Geneva%3A%20Genetic%20effects%20in%20space%20and%20time.pdf https://doi.org/10.1002/ece3.3073 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Arctic charr Arctic Salvelinus alpinus |
genre_facet |
Arctic Arctic charr Arctic Salvelinus alpinus |
op_relation |
https://eprints.whiterose.ac.uk/127079/1/Stocking%20activities%20for%20the%20Arctic%20charr%20in%20Lake%20Geneva%3A%20Genetic%20effects%20in%20space%20and%20time.pdf Savary, R., Dufresnes, C., Champigneulle, A. et al. (4 more authors) (2017) Stocking activities for the Arctic charr in Lake Geneva: Genetic effects in space and time. Ecology and Evolution , 7 (14). pp. 5201-5211. |
op_rights |
cc_by_4 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1002/ece3.3073 |
container_title |
Ecology and Evolution |
container_volume |
7 |
container_issue |
14 |
container_start_page |
5201 |
op_container_end_page |
5211 |
_version_ |
1766298610186584064 |