Reduced relative fitness in hatchery‐origin Pink Salmon in two streams in Prince William Sound, Alaska
Abstract Previous studies generally report that hatchery‐origin Pacific Salmon (Oncorhynchus spp.) have lower relative reproductive success (RRS) than their natural‐origin counterparts. We estimated the RRS of Pink Salmon (O. gorbuscha) in Prince William Sound (PWS), Alaska using incomplete pedigree...
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ftdoajarticles:oai:doaj.org/article:f9410a6e845d4a87bc4f75da44e9603c 2023-05-15T17:59:36+02:00 Reduced relative fitness in hatchery‐origin Pink Salmon in two streams in Prince William Sound, Alaska Kyle R. Shedd Emily A. Lescak Christopher Habicht E. Eric Knudsen Tyler H. Dann Heather A. Hoyt Daniel J. Prince William D. Templin 2022-03-01T00:00:00Z https://doi.org/10.1111/eva.13356 https://doaj.org/article/f9410a6e845d4a87bc4f75da44e9603c EN eng Wiley https://doi.org/10.1111/eva.13356 https://doaj.org/toc/1752-4571 1752-4571 doi:10.1111/eva.13356 https://doaj.org/article/f9410a6e845d4a87bc4f75da44e9603c Evolutionary Applications, Vol 15, Iss 3, Pp 429-446 (2022) Alaska aquaculture fisheries fitness GT‐seq Hatchery Evolution QH359-425 article 2022 ftdoajarticles https://doi.org/10.1111/eva.13356 2022-12-31T03:54:55Z Abstract Previous studies generally report that hatchery‐origin Pacific Salmon (Oncorhynchus spp.) have lower relative reproductive success (RRS) than their natural‐origin counterparts. We estimated the RRS of Pink Salmon (O. gorbuscha) in Prince William Sound (PWS), Alaska using incomplete pedigrees. In contrast to other RRS studies, Pink Salmon have a short freshwater life history, freshwater habitats in PWS are largely unaltered by development, and sampling was conducted without the aid of dams or weirs resulting in incomplete sampling of spawning individuals. Pink Salmon released from large‐scale hatchery programs in PWS have interacted with wild populations for more than 15 generations. Hatchery populations were established from PWS populations but have subsequently been managed as separate broodstocks. Gene flow is primarily directional, from hatchery strays to wild populations. We used genetic‐based parentage analysis to estimate the RRS of a single generation of stray hatchery‐origin Pink Salmon in two streams, and across the odd‐ and even‐year lineages. Despite incomplete sampling, we assigned 1745 offspring to at least one parent. Reproductive success (RS), measured as sampled adult offspring that returned to their natal stream, was significantly lower for hatchery‐ vs. natural‐origin parents in both lineages, with RRS ranging from 0.03 to 0.47 for females and 0.05 to 0.86 for males. Generalized linear modeling for the even‐year lineage indicated that RRS was lower for hatchery‐origin fish, ranging from 0.42 to 0.60, after accounting for sample date (run timing), sample location within the stream, and fish length. Our results strongly suggest that hatchery‐origin strays have lower fitness in the wild. The consequences of reduced RRS on wild productivity depend on whether the mechanisms underlying reduced RRS are environmentally driven, and likely ephemeral, or genetically driven, and likely persistent across generations. Article in Journal/Newspaper Pink salmon Alaska Directory of Open Access Journals: DOAJ Articles Pacific Evolutionary Applications 15 3 429 446 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Alaska aquaculture fisheries fitness GT‐seq Hatchery Evolution QH359-425 |
spellingShingle |
Alaska aquaculture fisheries fitness GT‐seq Hatchery Evolution QH359-425 Kyle R. Shedd Emily A. Lescak Christopher Habicht E. Eric Knudsen Tyler H. Dann Heather A. Hoyt Daniel J. Prince William D. Templin Reduced relative fitness in hatchery‐origin Pink Salmon in two streams in Prince William Sound, Alaska |
topic_facet |
Alaska aquaculture fisheries fitness GT‐seq Hatchery Evolution QH359-425 |
description |
Abstract Previous studies generally report that hatchery‐origin Pacific Salmon (Oncorhynchus spp.) have lower relative reproductive success (RRS) than their natural‐origin counterparts. We estimated the RRS of Pink Salmon (O. gorbuscha) in Prince William Sound (PWS), Alaska using incomplete pedigrees. In contrast to other RRS studies, Pink Salmon have a short freshwater life history, freshwater habitats in PWS are largely unaltered by development, and sampling was conducted without the aid of dams or weirs resulting in incomplete sampling of spawning individuals. Pink Salmon released from large‐scale hatchery programs in PWS have interacted with wild populations for more than 15 generations. Hatchery populations were established from PWS populations but have subsequently been managed as separate broodstocks. Gene flow is primarily directional, from hatchery strays to wild populations. We used genetic‐based parentage analysis to estimate the RRS of a single generation of stray hatchery‐origin Pink Salmon in two streams, and across the odd‐ and even‐year lineages. Despite incomplete sampling, we assigned 1745 offspring to at least one parent. Reproductive success (RS), measured as sampled adult offspring that returned to their natal stream, was significantly lower for hatchery‐ vs. natural‐origin parents in both lineages, with RRS ranging from 0.03 to 0.47 for females and 0.05 to 0.86 for males. Generalized linear modeling for the even‐year lineage indicated that RRS was lower for hatchery‐origin fish, ranging from 0.42 to 0.60, after accounting for sample date (run timing), sample location within the stream, and fish length. Our results strongly suggest that hatchery‐origin strays have lower fitness in the wild. The consequences of reduced RRS on wild productivity depend on whether the mechanisms underlying reduced RRS are environmentally driven, and likely ephemeral, or genetically driven, and likely persistent across generations. |
format |
Article in Journal/Newspaper |
author |
Kyle R. Shedd Emily A. Lescak Christopher Habicht E. Eric Knudsen Tyler H. Dann Heather A. Hoyt Daniel J. Prince William D. Templin |
author_facet |
Kyle R. Shedd Emily A. Lescak Christopher Habicht E. Eric Knudsen Tyler H. Dann Heather A. Hoyt Daniel J. Prince William D. Templin |
author_sort |
Kyle R. Shedd |
title |
Reduced relative fitness in hatchery‐origin Pink Salmon in two streams in Prince William Sound, Alaska |
title_short |
Reduced relative fitness in hatchery‐origin Pink Salmon in two streams in Prince William Sound, Alaska |
title_full |
Reduced relative fitness in hatchery‐origin Pink Salmon in two streams in Prince William Sound, Alaska |
title_fullStr |
Reduced relative fitness in hatchery‐origin Pink Salmon in two streams in Prince William Sound, Alaska |
title_full_unstemmed |
Reduced relative fitness in hatchery‐origin Pink Salmon in two streams in Prince William Sound, Alaska |
title_sort |
reduced relative fitness in hatchery‐origin pink salmon in two streams in prince william sound, alaska |
publisher |
Wiley |
publishDate |
2022 |
url |
https://doi.org/10.1111/eva.13356 https://doaj.org/article/f9410a6e845d4a87bc4f75da44e9603c |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Pink salmon Alaska |
genre_facet |
Pink salmon Alaska |
op_source |
Evolutionary Applications, Vol 15, Iss 3, Pp 429-446 (2022) |
op_relation |
https://doi.org/10.1111/eva.13356 https://doaj.org/toc/1752-4571 1752-4571 doi:10.1111/eva.13356 https://doaj.org/article/f9410a6e845d4a87bc4f75da44e9603c |
op_doi |
https://doi.org/10.1111/eva.13356 |
container_title |
Evolutionary Applications |
container_volume |
15 |
container_issue |
3 |
container_start_page |
429 |
op_container_end_page |
446 |
_version_ |
1766168446326800384 |