EXPERIENCE OF TWO-YEAR REARING OF CHERRY SALMON ONCORHYNCHUS MASOU JUVENILES AT FISH FARM ON ITURUP ISLAND
Results of cherry salmon juveniles rearing at Reidovo fish farm on Iturup Island during two annual cycles of cultivation are analyzed. Different variants of the breeders selection, feeding, preventive treatment, and release were tested. The breeders were caught in the river mouth and near the fish f...
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Format: | Article in Journal/Newspaper |
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Transactions of the Pacific Research Institute of Fisheries and Oceanography
2019
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Online Access: | https://doi.org/10.26428/1606-9919-2019-196-182-192 https://doaj.org/article/d6a8e5e6e0834bc4bc46646461c37692 |
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ftdoajarticles:oai:doaj.org/article:d6a8e5e6e0834bc4bc46646461c37692 2023-10-09T21:55:19+02:00 EXPERIENCE OF TWO-YEAR REARING OF CHERRY SALMON ONCORHYNCHUS MASOU JUVENILES AT FISH FARM ON ITURUP ISLAND V. P. Pogodin S. I. Borzov M. S. Myakishev I. A. Varaksin O. V. Zelennikov 2019-03-01T00:00:00Z https://doi.org/10.26428/1606-9919-2019-196-182-192 https://doaj.org/article/d6a8e5e6e0834bc4bc46646461c37692 RU rus Transactions of the Pacific Research Institute of Fisheries and Oceanography https://izvestiya.tinro-center.ru/jour/article/view/457 https://doaj.org/toc/1606-9919 https://doaj.org/toc/2658-5510 1606-9919 2658-5510 doi:10.26428/1606-9919-2019-196-182-192 https://doaj.org/article/d6a8e5e6e0834bc4bc46646461c37692 Известия ТИНРО, Vol 196, Iss 1, Pp 182-192 (2019) сима итуруп рыбоводный завод ооциты карликовые самцы Aquaculture. Fisheries. Angling SH1-691 article 2019 ftdoajarticles https://doi.org/10.26428/1606-9919-2019-196-182-192 2023-09-10T00:41:26Z Results of cherry salmon juveniles rearing at Reidovo fish farm on Iturup Island during two annual cycles of cultivation are analyzed. Different variants of the breeders selection, feeding, preventive treatment, and release were tested. The breeders were caught in the river mouth and near the fish farm. Mass mortality of young fish in the first and second years was avoided by decreasing of their density and other preventive measures. Minced fish was used as a food for them that is less expensive in compare with a combined fodder. The best diet for the second year of rearing was the minced pink salmon with the daily ration of 2 % of the juveniles body weight; it provided a significant decrease of mortality and enhanced their growth. After 2-year rearing, percentage of females, anadromous males, and dwarf males was 42.1, 36.3, and 21.6 %, respectively. Their weights were similar, though a group of fast-growing males was found among the dwarfs. The mass of ovaries varied from 13 to 46 mg in close dependence on females’ body weight (r = 0.81). Before the release, the ovaries of all females contained oocytes of similar size (varied in 2–4 times) at the final stage of previtellogenesis. Number of the oocytes per transverse section varied from 4.7 to 32.3, on average for 5 cuts and their diameter varied from 164.3 to 279.2 mm and did not correlate with the females body weight. The mass of dwarf males’ testes varied from 14 to 488 mg in dependence on their body weight (r = 0.78). The elder oocytes of females would mature in a year, and majority of dwarf males would reach the maturity in autumn of the current year. Article in Journal/Newspaper Pink salmon Directory of Open Access Journals: DOAJ Articles Izvestiya TINRO 196 182 192 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
Russian |
topic |
сима итуруп рыбоводный завод ооциты карликовые самцы Aquaculture. Fisheries. Angling SH1-691 |
spellingShingle |
сима итуруп рыбоводный завод ооциты карликовые самцы Aquaculture. Fisheries. Angling SH1-691 V. P. Pogodin S. I. Borzov M. S. Myakishev I. A. Varaksin O. V. Zelennikov EXPERIENCE OF TWO-YEAR REARING OF CHERRY SALMON ONCORHYNCHUS MASOU JUVENILES AT FISH FARM ON ITURUP ISLAND |
topic_facet |
сима итуруп рыбоводный завод ооциты карликовые самцы Aquaculture. Fisheries. Angling SH1-691 |
description |
Results of cherry salmon juveniles rearing at Reidovo fish farm on Iturup Island during two annual cycles of cultivation are analyzed. Different variants of the breeders selection, feeding, preventive treatment, and release were tested. The breeders were caught in the river mouth and near the fish farm. Mass mortality of young fish in the first and second years was avoided by decreasing of their density and other preventive measures. Minced fish was used as a food for them that is less expensive in compare with a combined fodder. The best diet for the second year of rearing was the minced pink salmon with the daily ration of 2 % of the juveniles body weight; it provided a significant decrease of mortality and enhanced their growth. After 2-year rearing, percentage of females, anadromous males, and dwarf males was 42.1, 36.3, and 21.6 %, respectively. Their weights were similar, though a group of fast-growing males was found among the dwarfs. The mass of ovaries varied from 13 to 46 mg in close dependence on females’ body weight (r = 0.81). Before the release, the ovaries of all females contained oocytes of similar size (varied in 2–4 times) at the final stage of previtellogenesis. Number of the oocytes per transverse section varied from 4.7 to 32.3, on average for 5 cuts and their diameter varied from 164.3 to 279.2 mm and did not correlate with the females body weight. The mass of dwarf males’ testes varied from 14 to 488 mg in dependence on their body weight (r = 0.78). The elder oocytes of females would mature in a year, and majority of dwarf males would reach the maturity in autumn of the current year. |
format |
Article in Journal/Newspaper |
author |
V. P. Pogodin S. I. Borzov M. S. Myakishev I. A. Varaksin O. V. Zelennikov |
author_facet |
V. P. Pogodin S. I. Borzov M. S. Myakishev I. A. Varaksin O. V. Zelennikov |
author_sort |
V. P. Pogodin |
title |
EXPERIENCE OF TWO-YEAR REARING OF CHERRY SALMON ONCORHYNCHUS MASOU JUVENILES AT FISH FARM ON ITURUP ISLAND |
title_short |
EXPERIENCE OF TWO-YEAR REARING OF CHERRY SALMON ONCORHYNCHUS MASOU JUVENILES AT FISH FARM ON ITURUP ISLAND |
title_full |
EXPERIENCE OF TWO-YEAR REARING OF CHERRY SALMON ONCORHYNCHUS MASOU JUVENILES AT FISH FARM ON ITURUP ISLAND |
title_fullStr |
EXPERIENCE OF TWO-YEAR REARING OF CHERRY SALMON ONCORHYNCHUS MASOU JUVENILES AT FISH FARM ON ITURUP ISLAND |
title_full_unstemmed |
EXPERIENCE OF TWO-YEAR REARING OF CHERRY SALMON ONCORHYNCHUS MASOU JUVENILES AT FISH FARM ON ITURUP ISLAND |
title_sort |
experience of two-year rearing of cherry salmon oncorhynchus masou juveniles at fish farm on iturup island |
publisher |
Transactions of the Pacific Research Institute of Fisheries and Oceanography |
publishDate |
2019 |
url |
https://doi.org/10.26428/1606-9919-2019-196-182-192 https://doaj.org/article/d6a8e5e6e0834bc4bc46646461c37692 |
genre |
Pink salmon |
genre_facet |
Pink salmon |
op_source |
Известия ТИНРО, Vol 196, Iss 1, Pp 182-192 (2019) |
op_relation |
https://izvestiya.tinro-center.ru/jour/article/view/457 https://doaj.org/toc/1606-9919 https://doaj.org/toc/2658-5510 1606-9919 2658-5510 doi:10.26428/1606-9919-2019-196-182-192 https://doaj.org/article/d6a8e5e6e0834bc4bc46646461c37692 |
op_doi |
https://doi.org/10.26428/1606-9919-2019-196-182-192 |
container_title |
Izvestiya TINRO |
container_volume |
196 |
container_start_page |
182 |
op_container_end_page |
192 |
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1779319181654622208 |