Spawning-Age Differences and their Temporal Trends in Wild and Sea-Ranched Atlantic Salmon Stocks, from Stock Mixture Data
Origin and age was determined for individual fish caught in offshore catches of Atlantic salmon stocks ( Salmo salar L.) in the Baltic Sea over the years 2000–2009. DNA microsatellite loci and smolt age were used to probabilistically assign returning spawners to their stock of origin. Data for this...
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crbenthamsciepub:10.2174/1874401x01407010046 2024-05-19T07:37:40+00:00 Spawning-Age Differences and their Temporal Trends in Wild and Sea-Ranched Atlantic Salmon Stocks, from Stock Mixture Data Kallio-Nyberg, Irma Koljonen, Marja-Liisa Saloniemi, Irma 2014 http://dx.doi.org/10.2174/1874401x01407010046 https://openfishsciencejournal.com/contents/volumes/V7/TOFISHSJ-7-46/TOFISHSJ-7-46.pdf https://openfishsciencejournal.com/contents/volumes/V7/TOFISHSJ-7-46/TOFISHSJ-7-46.xml en eng Bentham Science Publishers Ltd. https://creativecommons.org/licenses/by/4.0/legalcode The Open Fish Science Journal volume 7, issue 1, page 46-58 ISSN 1874-401X journal-article 2014 crbenthamsciepub https://doi.org/10.2174/1874401x01407010046 2024-05-02T06:49:51Z Origin and age was determined for individual fish caught in offshore catches of Atlantic salmon stocks ( Salmo salar L.) in the Baltic Sea over the years 2000–2009. DNA microsatellite loci and smolt age were used to probabilistically assign returning spawners to their stock of origin. Data for this study were based on approximately 2600 catch samples of the five most common wild and four sea-ranched, hatchery-reared stocks. Spawning age, and sex ratio differed both within and between these wild, and sea-ranched groups. The females were mainly (78.7%) two sea-winters old and the males usually (68.7%) only one sea-winter old. In both sexes, the mean age at maturity was lower in the hatchery-reared, sea-ranched stocks than in naturally reproducing stocks. In the 2000s, there was a weak decreasing trend in the male spawning age, but not in that of females. The sex-ratio of the spawners was female dominant in the naturally reproducing stocks, but male dominant in hatchery-reared stocks. Published historical data from two of the same rivers suggest that the majority of males were multi-sea-winter spawners in the 1930s, and variation in the age distribution of the spawners has become narrower and skewed towards a younger age in the present data (2000–2009) compared to the earlier situation. Article in Journal/Newspaper Atlantic salmon Salmo salar Bentham Science Publishers The Open Fish Science Journal 7 1 46 58 |
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Open Polar |
collection |
Bentham Science Publishers |
op_collection_id |
crbenthamsciepub |
language |
English |
description |
Origin and age was determined for individual fish caught in offshore catches of Atlantic salmon stocks ( Salmo salar L.) in the Baltic Sea over the years 2000–2009. DNA microsatellite loci and smolt age were used to probabilistically assign returning spawners to their stock of origin. Data for this study were based on approximately 2600 catch samples of the five most common wild and four sea-ranched, hatchery-reared stocks. Spawning age, and sex ratio differed both within and between these wild, and sea-ranched groups. The females were mainly (78.7%) two sea-winters old and the males usually (68.7%) only one sea-winter old. In both sexes, the mean age at maturity was lower in the hatchery-reared, sea-ranched stocks than in naturally reproducing stocks. In the 2000s, there was a weak decreasing trend in the male spawning age, but not in that of females. The sex-ratio of the spawners was female dominant in the naturally reproducing stocks, but male dominant in hatchery-reared stocks. Published historical data from two of the same rivers suggest that the majority of males were multi-sea-winter spawners in the 1930s, and variation in the age distribution of the spawners has become narrower and skewed towards a younger age in the present data (2000–2009) compared to the earlier situation. |
format |
Article in Journal/Newspaper |
author |
Kallio-Nyberg, Irma Koljonen, Marja-Liisa Saloniemi, Irma |
spellingShingle |
Kallio-Nyberg, Irma Koljonen, Marja-Liisa Saloniemi, Irma Spawning-Age Differences and their Temporal Trends in Wild and Sea-Ranched Atlantic Salmon Stocks, from Stock Mixture Data |
author_facet |
Kallio-Nyberg, Irma Koljonen, Marja-Liisa Saloniemi, Irma |
author_sort |
Kallio-Nyberg, Irma |
title |
Spawning-Age Differences and their Temporal Trends in Wild and Sea-Ranched Atlantic Salmon Stocks, from Stock Mixture Data |
title_short |
Spawning-Age Differences and their Temporal Trends in Wild and Sea-Ranched Atlantic Salmon Stocks, from Stock Mixture Data |
title_full |
Spawning-Age Differences and their Temporal Trends in Wild and Sea-Ranched Atlantic Salmon Stocks, from Stock Mixture Data |
title_fullStr |
Spawning-Age Differences and their Temporal Trends in Wild and Sea-Ranched Atlantic Salmon Stocks, from Stock Mixture Data |
title_full_unstemmed |
Spawning-Age Differences and their Temporal Trends in Wild and Sea-Ranched Atlantic Salmon Stocks, from Stock Mixture Data |
title_sort |
spawning-age differences and their temporal trends in wild and sea-ranched atlantic salmon stocks, from stock mixture data |
publisher |
Bentham Science Publishers Ltd. |
publishDate |
2014 |
url |
http://dx.doi.org/10.2174/1874401x01407010046 https://openfishsciencejournal.com/contents/volumes/V7/TOFISHSJ-7-46/TOFISHSJ-7-46.pdf https://openfishsciencejournal.com/contents/volumes/V7/TOFISHSJ-7-46/TOFISHSJ-7-46.xml |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
The Open Fish Science Journal volume 7, issue 1, page 46-58 ISSN 1874-401X |
op_rights |
https://creativecommons.org/licenses/by/4.0/legalcode |
op_doi |
https://doi.org/10.2174/1874401x01407010046 |
container_title |
The Open Fish Science Journal |
container_volume |
7 |
container_issue |
1 |
container_start_page |
46 |
op_container_end_page |
58 |
_version_ |
1799477008168648704 |