Fitness effects of assisted gene flow in an endangered salmonid population
Abstract Assisted gene flow is increasingly used to combat severe population declines. However, the associated risks, such as outbreeding depression, are often insufficiently assessed. Here, we studied the impact of assisted gene flow on the fitness of a highly endangered landlocked salmon populatio...
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Online Access: | https://doi.org/10.1111/csp2.13058 https://doaj.org/article/383d802d25f94e9dbf897ef118f1a06b |
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ftdoajarticles:oai:doaj.org/article:383d802d25f94e9dbf897ef118f1a06b 2024-02-11T10:02:12+01:00 Fitness effects of assisted gene flow in an endangered salmonid population Ines Klemme Joonas Pysäys Pekka Hyvärinen Anssi Karvonen 2024-01-01T00:00:00Z https://doi.org/10.1111/csp2.13058 https://doaj.org/article/383d802d25f94e9dbf897ef118f1a06b EN eng Wiley https://doi.org/10.1111/csp2.13058 https://doaj.org/toc/2578-4854 2578-4854 doi:10.1111/csp2.13058 https://doaj.org/article/383d802d25f94e9dbf897ef118f1a06b Conservation Science and Practice, Vol 6, Iss 1, Pp n/a-n/a (2024) assisted gene flow growth rate heterosis landlocked salmon outbreeding depression parasite infection Ecology QH540-549.5 General. Including nature conservation geographical distribution QH1-199.5 article 2024 ftdoajarticles https://doi.org/10.1111/csp2.13058 2024-01-21T01:41:40Z Abstract Assisted gene flow is increasingly used to combat severe population declines. However, the associated risks, such as outbreeding depression, are often insufficiently assessed. Here, we studied the impact of assisted gene flow on the fitness of a highly endangered landlocked salmon population (Salmo salar m. sebago) from the lake Saimaa complex (Finland), using an anadromous Atlantic salmon population (S. salar) as donor. We released individuals of both parental populations and their hybrids into seminatural streams, monitoring their survival under predation risk from Northern pike (Esox lucius) and their growth on a natural diet. Before release, we exposed half of the salmon to the parasite Diplostomum pseudospathaceum to study whether assisted gene flow affects infection susceptibility, which could indirectly shape predation susceptibility and growth. The parental populations differed in both studied traits and the hybrids showed intermediate values. Relative to the target landlocked salmon population, hybrids experienced 21–26% lower survival, but 1.4–2.2% higher growth. They also carried 0.6–2.8 more parasites than the landlocked salmon, contributing to survival differences. These findings indicate that assisted gene flow can induce both negative and positive fitness effects. We propose that the overall net effects of this conservation tool need to be carefully evaluated before its implementation. Article in Journal/Newspaper Atlantic salmon Salmo salar Directory of Open Access Journals: DOAJ Articles Conservation Science and Practice 6 1 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
assisted gene flow growth rate heterosis landlocked salmon outbreeding depression parasite infection Ecology QH540-549.5 General. Including nature conservation geographical distribution QH1-199.5 |
spellingShingle |
assisted gene flow growth rate heterosis landlocked salmon outbreeding depression parasite infection Ecology QH540-549.5 General. Including nature conservation geographical distribution QH1-199.5 Ines Klemme Joonas Pysäys Pekka Hyvärinen Anssi Karvonen Fitness effects of assisted gene flow in an endangered salmonid population |
topic_facet |
assisted gene flow growth rate heterosis landlocked salmon outbreeding depression parasite infection Ecology QH540-549.5 General. Including nature conservation geographical distribution QH1-199.5 |
description |
Abstract Assisted gene flow is increasingly used to combat severe population declines. However, the associated risks, such as outbreeding depression, are often insufficiently assessed. Here, we studied the impact of assisted gene flow on the fitness of a highly endangered landlocked salmon population (Salmo salar m. sebago) from the lake Saimaa complex (Finland), using an anadromous Atlantic salmon population (S. salar) as donor. We released individuals of both parental populations and their hybrids into seminatural streams, monitoring their survival under predation risk from Northern pike (Esox lucius) and their growth on a natural diet. Before release, we exposed half of the salmon to the parasite Diplostomum pseudospathaceum to study whether assisted gene flow affects infection susceptibility, which could indirectly shape predation susceptibility and growth. The parental populations differed in both studied traits and the hybrids showed intermediate values. Relative to the target landlocked salmon population, hybrids experienced 21–26% lower survival, but 1.4–2.2% higher growth. They also carried 0.6–2.8 more parasites than the landlocked salmon, contributing to survival differences. These findings indicate that assisted gene flow can induce both negative and positive fitness effects. We propose that the overall net effects of this conservation tool need to be carefully evaluated before its implementation. |
format |
Article in Journal/Newspaper |
author |
Ines Klemme Joonas Pysäys Pekka Hyvärinen Anssi Karvonen |
author_facet |
Ines Klemme Joonas Pysäys Pekka Hyvärinen Anssi Karvonen |
author_sort |
Ines Klemme |
title |
Fitness effects of assisted gene flow in an endangered salmonid population |
title_short |
Fitness effects of assisted gene flow in an endangered salmonid population |
title_full |
Fitness effects of assisted gene flow in an endangered salmonid population |
title_fullStr |
Fitness effects of assisted gene flow in an endangered salmonid population |
title_full_unstemmed |
Fitness effects of assisted gene flow in an endangered salmonid population |
title_sort |
fitness effects of assisted gene flow in an endangered salmonid population |
publisher |
Wiley |
publishDate |
2024 |
url |
https://doi.org/10.1111/csp2.13058 https://doaj.org/article/383d802d25f94e9dbf897ef118f1a06b |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
Conservation Science and Practice, Vol 6, Iss 1, Pp n/a-n/a (2024) |
op_relation |
https://doi.org/10.1111/csp2.13058 https://doaj.org/toc/2578-4854 2578-4854 doi:10.1111/csp2.13058 https://doaj.org/article/383d802d25f94e9dbf897ef118f1a06b |
op_doi |
https://doi.org/10.1111/csp2.13058 |
container_title |
Conservation Science and Practice |
container_volume |
6 |
container_issue |
1 |
_version_ |
1790598106869399552 |