Population dynamics of Japanese pink salmon ( Oncorhynchus gorbuscha): are recent increases explained by hatchery programs or climatic variations?
Hatchery programs involving the mass release of artificially propagated fishes have been implemented worldwide. However, few studies have assessed whether hatchery programs actually increase the net population growth of the target species after accounting for the effects of density dependence and cl...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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Online Access: | http://dx.doi.org/10.1139/f05-207 http://www.nrcresearchpress.com/doi/pdf/10.1139/f05-207 |
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crcansciencepubl:10.1139/f05-207 2024-06-23T07:55:56+00:00 Population dynamics of Japanese pink salmon ( Oncorhynchus gorbuscha): are recent increases explained by hatchery programs or climatic variations? Morita, Kentaro Morita, Shoko H Fukuwaka, Masa-aki 2006 http://dx.doi.org/10.1139/f05-207 http://www.nrcresearchpress.com/doi/pdf/10.1139/f05-207 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 63, issue 1, page 55-62 ISSN 0706-652X 1205-7533 journal-article 2006 crcansciencepubl https://doi.org/10.1139/f05-207 2024-06-13T04:10:47Z Hatchery programs involving the mass release of artificially propagated fishes have been implemented worldwide. However, few studies have assessed whether hatchery programs actually increase the net population growth of the target species after accounting for the effects of density dependence and climatic variation. We examined the combined effects of density dependence, climatic variation, and hatchery release on the population dynamics of Japanese pink salmon (Oncorhynchus gorbuscha) from 1969 to 2003. The population trends were more closely linked to climatic factors than to the intensity of the hatchery programs. The estimated contributions of hatchery-released fry to catches during the past decade are small. We concluded that the recent catch increases of Japanese pink salmon could be largely explained by climate change, with increased hatchery releases having little effect. Article in Journal/Newspaper Oncorhynchus gorbuscha Pink salmon Canadian Science Publishing Canadian Journal of Fisheries and Aquatic Sciences 63 1 55 62 |
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Open Polar |
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Canadian Science Publishing |
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crcansciencepubl |
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English |
description |
Hatchery programs involving the mass release of artificially propagated fishes have been implemented worldwide. However, few studies have assessed whether hatchery programs actually increase the net population growth of the target species after accounting for the effects of density dependence and climatic variation. We examined the combined effects of density dependence, climatic variation, and hatchery release on the population dynamics of Japanese pink salmon (Oncorhynchus gorbuscha) from 1969 to 2003. The population trends were more closely linked to climatic factors than to the intensity of the hatchery programs. The estimated contributions of hatchery-released fry to catches during the past decade are small. We concluded that the recent catch increases of Japanese pink salmon could be largely explained by climate change, with increased hatchery releases having little effect. |
format |
Article in Journal/Newspaper |
author |
Morita, Kentaro Morita, Shoko H Fukuwaka, Masa-aki |
spellingShingle |
Morita, Kentaro Morita, Shoko H Fukuwaka, Masa-aki Population dynamics of Japanese pink salmon ( Oncorhynchus gorbuscha): are recent increases explained by hatchery programs or climatic variations? |
author_facet |
Morita, Kentaro Morita, Shoko H Fukuwaka, Masa-aki |
author_sort |
Morita, Kentaro |
title |
Population dynamics of Japanese pink salmon ( Oncorhynchus gorbuscha): are recent increases explained by hatchery programs or climatic variations? |
title_short |
Population dynamics of Japanese pink salmon ( Oncorhynchus gorbuscha): are recent increases explained by hatchery programs or climatic variations? |
title_full |
Population dynamics of Japanese pink salmon ( Oncorhynchus gorbuscha): are recent increases explained by hatchery programs or climatic variations? |
title_fullStr |
Population dynamics of Japanese pink salmon ( Oncorhynchus gorbuscha): are recent increases explained by hatchery programs or climatic variations? |
title_full_unstemmed |
Population dynamics of Japanese pink salmon ( Oncorhynchus gorbuscha): are recent increases explained by hatchery programs or climatic variations? |
title_sort |
population dynamics of japanese pink salmon ( oncorhynchus gorbuscha): are recent increases explained by hatchery programs or climatic variations? |
publisher |
Canadian Science Publishing |
publishDate |
2006 |
url |
http://dx.doi.org/10.1139/f05-207 http://www.nrcresearchpress.com/doi/pdf/10.1139/f05-207 |
genre |
Oncorhynchus gorbuscha Pink salmon |
genre_facet |
Oncorhynchus gorbuscha Pink salmon |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 63, issue 1, page 55-62 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f05-207 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
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63 |
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1 |
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55 |
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62 |
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1802648740218011648 |