Regularities of reproduction for pink salmon Oncorhynchus gorbuscha from the Iska River
Reasons for rapid rise of pink salmon landings in the Sakhalin Bay (Okhotsk Sea) in the early 21 century are analyzed. Dependence of its juveniles and adults numbers on the number of their parents is well described with Ricker equation, and the recruitment depends linearly on the number of juveniles...
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| Format: | Article |
| Language: | Russian |
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Transactions of the Pacific Research Institute of Fisheries and Oceanography
2018-09-01
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| Series: | Известия ТИНРО |
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| Online Access: | https://izvestiya.tinro-center.ru/jour/article/view/397 |
| _version_ | 1826572153655394304 |
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| author | V. I. Ostrovsky |
| author_facet | V. I. Ostrovsky |
| author_sort | V. I. Ostrovsky |
| collection | DOAJ |
| description | Reasons for rapid rise of pink salmon landings in the Sakhalin Bay (Okhotsk Sea) in the early 21 century are analyzed. Dependence of its juveniles and adults numbers on the number of their parents is well described with Ricker equation, and the recruitment depends linearly on the number of juveniles in the river. Several factors of the pink salmon reproduction are compared between the early 21 century and previous period. There is found that recent increase of the catches could not be reasoned by favorable changes of environments, decreasing of juveniles mortality either in the river or in the sea, extending of spawning grounds, growth of spawning stock or number of juveniles. The only possible reason for significant rise of the landings could be an increasing by-catch of transitory stocks. |
| first_indexed | 2024-03-12T04:48:14Z |
| format | Article |
| id | doaj.art-b264803c11614b66867bac955d2c6e03 |
| institution | Directory Open Access Journal |
| issn | 1606-9919 2658-5510 |
| language | Russian |
| last_indexed | 2025-03-14T12:22:29Z |
| publishDate | 2018-09-01 |
| publisher | Transactions of the Pacific Research Institute of Fisheries and Oceanography |
| record_format | Article |
| series | Известия ТИНРО |
| spelling | doaj.art-b264803c11614b66867bac955d2c6e032025-03-02T09:31:40ZrusTransactions of the Pacific Research Institute of Fisheries and OceanographyИзвестия ТИНРО1606-99192658-55102018-09-011943546710.26428/1606-9919-2018-194-54-67388Regularities of reproduction for pink salmon Oncorhynchus gorbuscha from the Iska RiverV. I. Ostrovsky0Хабаровский филиал Тихоокеанского научно-исследовательского рыбохозяйственного центраReasons for rapid rise of pink salmon landings in the Sakhalin Bay (Okhotsk Sea) in the early 21 century are analyzed. Dependence of its juveniles and adults numbers on the number of their parents is well described with Ricker equation, and the recruitment depends linearly on the number of juveniles in the river. Several factors of the pink salmon reproduction are compared between the early 21 century and previous period. There is found that recent increase of the catches could not be reasoned by favorable changes of environments, decreasing of juveniles mortality either in the river or in the sea, extending of spawning grounds, growth of spawning stock or number of juveniles. The only possible reason for significant rise of the landings could be an increasing by-catch of transitory stocks.https://izvestiya.tinro-center.ru/jour/article/view/397pink salmononcorhynchus gorbuschaabundance dynamicscatchmigration route |
| spellingShingle | V. I. Ostrovsky Regularities of reproduction for pink salmon Oncorhynchus gorbuscha from the Iska River Известия ТИНРО pink salmon oncorhynchus gorbuscha abundance dynamics catch migration route |
| title | Regularities of reproduction for pink salmon Oncorhynchus gorbuscha from the Iska River |
| title_full | Regularities of reproduction for pink salmon Oncorhynchus gorbuscha from the Iska River |
| title_fullStr | Regularities of reproduction for pink salmon Oncorhynchus gorbuscha from the Iska River |
| title_full_unstemmed | Regularities of reproduction for pink salmon Oncorhynchus gorbuscha from the Iska River |
| title_short | Regularities of reproduction for pink salmon Oncorhynchus gorbuscha from the Iska River |
| title_sort | regularities of reproduction for pink salmon oncorhynchus gorbuscha from the iska river |
| topic | pink salmon oncorhynchus gorbuscha abundance dynamics catch migration route |
| url | https://izvestiya.tinro-center.ru/jour/article/view/397 |
| work_keys_str_mv | AT viostrovsky regularitiesofreproductionforpinksalmononcorhynchusgorbuschafromtheiskariver |