Standardization of CPUE for walleye pollock in the Okhotsk Sea with inclusion of some environmental factors
Catch of walleye pollock by Russia is the highest in the northern Okhotsk Sea where on average 0.94 million metric tons were caught annually in the period between 1962 and 2017, or around 24 % of the total yield of Russian fishery. The total stock and spawning stock of pollock grow there since 2002,...
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Transactions of the Pacific Research Institute of Fisheries and Oceanography
2020
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Online Access: | https://doi.org/10.26428/1606-9919-2020-200-819-836 https://doaj.org/article/55933ee59418437893080ad4655c71ee |
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ftdoajarticles:oai:doaj.org/article:55933ee59418437893080ad4655c71ee 2023-10-09T21:54:59+02:00 Standardization of CPUE for walleye pollock in the Okhotsk Sea with inclusion of some environmental factors V. V. Kulik A. I. Varkentin O. I. Ilyin 2020-12-01T00:00:00Z https://doi.org/10.26428/1606-9919-2020-200-819-836 https://doaj.org/article/55933ee59418437893080ad4655c71ee RU rus Transactions of the Pacific Research Institute of Fisheries and Oceanography https://izvestiya.tinro-center.ru/jour/article/view/589 https://doaj.org/toc/1606-9919 https://doaj.org/toc/2658-5510 1606-9919 2658-5510 doi:10.26428/1606-9919-2020-200-819-836 https://doaj.org/article/55933ee59418437893080ad4655c71ee Известия ТИНРО, Vol 200, Iss 4, Pp 819-836 (2020) минтай вылов охотское море стандартизация вылов на единицу усилия обобщенные линейные модели обобщенные аддитивные модели температура поверхности моря Aquaculture. Fisheries. Angling SH1-691 article 2020 ftdoajarticles https://doi.org/10.26428/1606-9919-2020-200-819-836 2023-09-10T00:41:26Z Catch of walleye pollock by Russia is the highest in the northern Okhotsk Sea where on average 0.94 million metric tons were caught annually in the period between 1962 and 2017, or around 24 % of the total yield of Russian fishery. The total stock and spawning stock of pollock grow there since 2002, though the catch per unit effort (CPUE) has significantly decreased in the beginning of 2018 despite expected high levels of both total and spawning stocks. The sea surface temperature, ice cover and storms frequency were examined as possible reasons of low fishing efficiency in 2018. For this purpose, the generalized linear models (GLM) and generalized additive models (GAM) of catch dynamics are compared. GAM with addition of temperature and storms factors has the lowest Schwarz’s Bayesian criterion and the highest explained deviance (61.6 %). Efficiency of fishing gears has nonlinear relationship with the towing time. CPUE has hypersensitivity to the stock biomass presented as the power dependence (γ = 0.94, r = 0.923). Standardized CPUE is recommended for using in the final GAM for the pollock stock assessment in the northern Okhotsk Sea, hypersensitivity of CPUE should be estimated and corrected if necessary. Article in Journal/Newspaper okhotsk sea Directory of Open Access Journals: DOAJ Articles Gam ENVELOPE(-57.955,-57.955,-61.923,-61.923) Okhotsk Izvestiya TINRO 200 4 819 836 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
Russian |
topic |
минтай вылов охотское море стандартизация вылов на единицу усилия обобщенные линейные модели обобщенные аддитивные модели температура поверхности моря Aquaculture. Fisheries. Angling SH1-691 |
spellingShingle |
минтай вылов охотское море стандартизация вылов на единицу усилия обобщенные линейные модели обобщенные аддитивные модели температура поверхности моря Aquaculture. Fisheries. Angling SH1-691 V. V. Kulik A. I. Varkentin O. I. Ilyin Standardization of CPUE for walleye pollock in the Okhotsk Sea with inclusion of some environmental factors |
topic_facet |
минтай вылов охотское море стандартизация вылов на единицу усилия обобщенные линейные модели обобщенные аддитивные модели температура поверхности моря Aquaculture. Fisheries. Angling SH1-691 |
description |
Catch of walleye pollock by Russia is the highest in the northern Okhotsk Sea where on average 0.94 million metric tons were caught annually in the period between 1962 and 2017, or around 24 % of the total yield of Russian fishery. The total stock and spawning stock of pollock grow there since 2002, though the catch per unit effort (CPUE) has significantly decreased in the beginning of 2018 despite expected high levels of both total and spawning stocks. The sea surface temperature, ice cover and storms frequency were examined as possible reasons of low fishing efficiency in 2018. For this purpose, the generalized linear models (GLM) and generalized additive models (GAM) of catch dynamics are compared. GAM with addition of temperature and storms factors has the lowest Schwarz’s Bayesian criterion and the highest explained deviance (61.6 %). Efficiency of fishing gears has nonlinear relationship with the towing time. CPUE has hypersensitivity to the stock biomass presented as the power dependence (γ = 0.94, r = 0.923). Standardized CPUE is recommended for using in the final GAM for the pollock stock assessment in the northern Okhotsk Sea, hypersensitivity of CPUE should be estimated and corrected if necessary. |
format |
Article in Journal/Newspaper |
author |
V. V. Kulik A. I. Varkentin O. I. Ilyin |
author_facet |
V. V. Kulik A. I. Varkentin O. I. Ilyin |
author_sort |
V. V. Kulik |
title |
Standardization of CPUE for walleye pollock in the Okhotsk Sea with inclusion of some environmental factors |
title_short |
Standardization of CPUE for walleye pollock in the Okhotsk Sea with inclusion of some environmental factors |
title_full |
Standardization of CPUE for walleye pollock in the Okhotsk Sea with inclusion of some environmental factors |
title_fullStr |
Standardization of CPUE for walleye pollock in the Okhotsk Sea with inclusion of some environmental factors |
title_full_unstemmed |
Standardization of CPUE for walleye pollock in the Okhotsk Sea with inclusion of some environmental factors |
title_sort |
standardization of cpue for walleye pollock in the okhotsk sea with inclusion of some environmental factors |
publisher |
Transactions of the Pacific Research Institute of Fisheries and Oceanography |
publishDate |
2020 |
url |
https://doi.org/10.26428/1606-9919-2020-200-819-836 https://doaj.org/article/55933ee59418437893080ad4655c71ee |
long_lat |
ENVELOPE(-57.955,-57.955,-61.923,-61.923) |
geographic |
Gam Okhotsk |
geographic_facet |
Gam Okhotsk |
genre |
okhotsk sea |
genre_facet |
okhotsk sea |
op_source |
Известия ТИНРО, Vol 200, Iss 4, Pp 819-836 (2020) |
op_relation |
https://izvestiya.tinro-center.ru/jour/article/view/589 https://doaj.org/toc/1606-9919 https://doaj.org/toc/2658-5510 1606-9919 2658-5510 doi:10.26428/1606-9919-2020-200-819-836 https://doaj.org/article/55933ee59418437893080ad4655c71ee |
op_doi |
https://doi.org/10.26428/1606-9919-2020-200-819-836 |
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Izvestiya TINRO |
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200 |
container_issue |
4 |
container_start_page |
819 |
op_container_end_page |
836 |
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1779318751257165824 |