Characteristics of adult chum salmon Oncorhynchus keta from the commercial stock at Iturup Island in 2023
Adult chum salmon Oncorhynchus keta specimens returning to spawn were caught in the Prostor and Kurilsky Bays of Iturup Island and examined in the period from September 18 to October 31, 2023. The males dominated among sexually mature or close to sexually mature individuals; the portion of females h...
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| Format: | Article |
| Language: | Russian |
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Transactions of the Pacific Research Institute of Fisheries and Oceanography
2024-04-01
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| Series: | Известия ТИНРО |
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| Online Access: | https://izvestiya.tinro-center.ru/jour/article/view/948 |
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| author | A. N. Elnikov O. V. Zelennikov |
| author_facet | A. N. Elnikov O. V. Zelennikov |
| author_sort | A. N. Elnikov |
| collection | DOAJ |
| description | Adult chum salmon Oncorhynchus keta specimens returning to spawn were caught in the Prostor and Kurilsky Bays of Iturup Island and examined in the period from September 18 to October 31, 2023. The males dominated among sexually mature or close to sexually mature individuals; the portion of females had a tendency to increasing from the beginning to the end of the run. Most of the fish were aged 3+ (76.8% and 77.9% on average in the Prostor and Kurilsky Bays, respectively), the average portion of fish at the age 2+ was 10.6% and at the age 4+ and 5+ — 12.0 %, although the portion of three-year-old fish varied very much between the samples that was not observed in previous 10 years. The weight of adult chum salmon in corresponding age groups was similar in these two bays, on average 2.47 and 2.72 kg for females and males at age 3+, respectively, that was slightly below the values in previous 9 years. |
| format | Article |
| id | doaj-art-4e12007c36274f328b4261a7ed0a929e |
| institution | Kabale University |
| issn | 1606-9919 2658-5510 |
| language | Russian |
| publishDate | 2024-04-01 |
| publisher | Transactions of the Pacific Research Institute of Fisheries and Oceanography |
| record_format | Article |
| series | Известия ТИНРО |
| spelling | doaj-art-4e12007c36274f328b4261a7ed0a929e2025-08-20T03:39:48ZrusTransactions of the Pacific Research Institute of Fisheries and OceanographyИзвестия ТИНРО1606-99192658-55102024-04-010026727310.26428/losos_bull18-2024-267-273826Characteristics of adult chum salmon Oncorhynchus keta from the commercial stock at Iturup Island in 2023A. N. Elnikov0O. V. Zelennikov1Russian Federal Research Institute of Fisheries and OceanographySt. Petersburg State UniversityAdult chum salmon Oncorhynchus keta specimens returning to spawn were caught in the Prostor and Kurilsky Bays of Iturup Island and examined in the period from September 18 to October 31, 2023. The males dominated among sexually mature or close to sexually mature individuals; the portion of females had a tendency to increasing from the beginning to the end of the run. Most of the fish were aged 3+ (76.8% and 77.9% on average in the Prostor and Kurilsky Bays, respectively), the average portion of fish at the age 2+ was 10.6% and at the age 4+ and 5+ — 12.0 %, although the portion of three-year-old fish varied very much between the samples that was not observed in previous 10 years. The weight of adult chum salmon in corresponding age groups was similar in these two bays, on average 2.47 and 2.72 kg for females and males at age 3+, respectively, that was slightly below the values in previous 9 years.https://izvestiya.tinro-center.ru/jour/article/view/948chum salmononcorhynchus ketaiturupbiological parameters of spawnerscommercial stock |
| spellingShingle | A. N. Elnikov O. V. Zelennikov Characteristics of adult chum salmon Oncorhynchus keta from the commercial stock at Iturup Island in 2023 Известия ТИНРО chum salmon oncorhynchus keta iturup biological parameters of spawners commercial stock |
| title | Characteristics of adult chum salmon Oncorhynchus keta from the commercial stock at Iturup Island in 2023 |
| title_full | Characteristics of adult chum salmon Oncorhynchus keta from the commercial stock at Iturup Island in 2023 |
| title_fullStr | Characteristics of adult chum salmon Oncorhynchus keta from the commercial stock at Iturup Island in 2023 |
| title_full_unstemmed | Characteristics of adult chum salmon Oncorhynchus keta from the commercial stock at Iturup Island in 2023 |
| title_short | Characteristics of adult chum salmon Oncorhynchus keta from the commercial stock at Iturup Island in 2023 |
| title_sort | characteristics of adult chum salmon oncorhynchus keta from the commercial stock at iturup island in 2023 |
| topic | chum salmon oncorhynchus keta iturup biological parameters of spawners commercial stock |
| url | https://izvestiya.tinro-center.ru/jour/article/view/948 |
| work_keys_str_mv | AT anelnikov characteristicsofadultchumsalmononcorhynchusketafromthecommercialstockatiturupislandin2023 AT ovzelennikov characteristicsofadultchumsalmononcorhynchusketafromthecommercialstockatiturupislandin2023 |