Hydrological regime in the lower reaches of spawning rivers Shumnaya and Kohmayuri (Paramushir Island, northern Kuril Islands)
Hydrological regime was explored in the lower reaches of two spawning rivers located on the western (Okhotsk Sea) coast of Paramushir Island: the Shumnaya and Kohmayuri. Water quality was examined by BLE-C600 multifunctional tester, dissolved oxygen content was measured by JPB-70A portable oximeter,...
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| Format: | Article |
| Language: | Russian |
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Transactions of the Pacific Research Institute of Fisheries and Oceanography
2025-05-01
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| Series: | Известия ТИНРО |
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| Online Access: | https://izvestiya.tinro-center.ru/jour/article/view/1041 |
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| author | T. Yu. Uglovа G. N. Dzen |
| author_facet | T. Yu. Uglovа G. N. Dzen |
| author_sort | T. Yu. Uglovа |
| collection | DOAJ |
| description | Hydrological regime was explored in the lower reaches of two spawning rivers located on the western (Okhotsk Sea) coast of Paramushir Island: the Shumnaya and Kohmayuri. Water quality was examined by BLE-C600 multifunctional tester, dissolved oxygen content was measured by JPB-70A portable oximeter, and samples of bottom soil were collected on the spawning grounds closest to the river mouths. Granulometric analysis of the samples was conducted in laboratory, with the size fractions separation by dry method, using the sieves KP-131. The water parameters and fractional composition of soil correspond to conditions suitable for reproduction of pink and sockeye salmon in both rivers. Entries of pacific salmon were observed during the hydrological surveys on August 3, 2022 and July 25, 2024; active run of sockeye salmon occurred in both dates, which prevailed over pink salmon spawners. |
| format | Article |
| id | doaj-art-1ac0d92cd17442439c0a79db4d7ed19f |
| institution | DOAJ |
| issn | 1606-9919 2658-5510 |
| language | Russian |
| publishDate | 2025-05-01 |
| publisher | Transactions of the Pacific Research Institute of Fisheries and Oceanography |
| record_format | Article |
| series | Известия ТИНРО |
| spelling | doaj-art-1ac0d92cd17442439c0a79db4d7ed19f2025-08-20T02:54:36ZrusTransactions of the Pacific Research Institute of Fisheries and OceanographyИзвестия ТИНРО1606-99192658-55102025-05-0101910511110.26428/losos_bull19-2025-105-111893Hydrological regime in the lower reaches of spawning rivers Shumnaya and Kohmayuri (Paramushir Island, northern Kuril Islands)T. Yu. Uglovа0G. N. Dzen1Russian Federal Research Institute of Fisheries and Oceanography,Sakhalin branch of VNIROHydrological regime was explored in the lower reaches of two spawning rivers located on the western (Okhotsk Sea) coast of Paramushir Island: the Shumnaya and Kohmayuri. Water quality was examined by BLE-C600 multifunctional tester, dissolved oxygen content was measured by JPB-70A portable oximeter, and samples of bottom soil were collected on the spawning grounds closest to the river mouths. Granulometric analysis of the samples was conducted in laboratory, with the size fractions separation by dry method, using the sieves KP-131. The water parameters and fractional composition of soil correspond to conditions suitable for reproduction of pink and sockeye salmon in both rivers. Entries of pacific salmon were observed during the hydrological surveys on August 3, 2022 and July 25, 2024; active run of sockeye salmon occurred in both dates, which prevailed over pink salmon spawners.https://izvestiya.tinro-center.ru/jour/article/view/1041paramushir islandshumnaya riverkohmayuri riverwater parameterssoil compositionpacific salmon |
| spellingShingle | T. Yu. Uglovа G. N. Dzen Hydrological regime in the lower reaches of spawning rivers Shumnaya and Kohmayuri (Paramushir Island, northern Kuril Islands) Известия ТИНРО paramushir island shumnaya river kohmayuri river water parameters soil composition pacific salmon |
| title | Hydrological regime in the lower reaches of spawning rivers Shumnaya and Kohmayuri (Paramushir Island, northern Kuril Islands) |
| title_full | Hydrological regime in the lower reaches of spawning rivers Shumnaya and Kohmayuri (Paramushir Island, northern Kuril Islands) |
| title_fullStr | Hydrological regime in the lower reaches of spawning rivers Shumnaya and Kohmayuri (Paramushir Island, northern Kuril Islands) |
| title_full_unstemmed | Hydrological regime in the lower reaches of spawning rivers Shumnaya and Kohmayuri (Paramushir Island, northern Kuril Islands) |
| title_short | Hydrological regime in the lower reaches of spawning rivers Shumnaya and Kohmayuri (Paramushir Island, northern Kuril Islands) |
| title_sort | hydrological regime in the lower reaches of spawning rivers shumnaya and kohmayuri paramushir island northern kuril islands |
| topic | paramushir island shumnaya river kohmayuri river water parameters soil composition pacific salmon |
| url | https://izvestiya.tinro-center.ru/jour/article/view/1041 |
| work_keys_str_mv | AT tyuuglova hydrologicalregimeinthelowerreachesofspawningriversshumnayaandkohmayuriparamushirislandnorthernkurilislands AT gndzen hydrologicalregimeinthelowerreachesofspawningriversshumnayaandkohmayuriparamushirislandnorthernkurilislands |