Assessment of the stock status for greenland halibut ( Reinhardtius hippoglossoides matsuurae ) in the Okhotsk Sea
State of the greenland halibut stock in the Sea of Okhotsk fishing zone is evaluated as overfished with a high probability of 97.5 % by the index of fishable biomass, and the overfishing continued in 2021. This conclusion is based on results of double filtering the posterior parameter estimates in t...
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Transactions of the Pacific Research Institute of Fisheries and Oceanography
2022
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Online Access: | https://doi.org/10.26428/1606-9919-2022-202-466-497 https://doaj.org/article/a4301f88245143b4bed734abb018be7b |
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ftdoajarticles:oai:doaj.org/article:a4301f88245143b4bed734abb018be7b 2023-10-09T21:51:55+02:00 Assessment of the stock status for greenland halibut ( Reinhardtius hippoglossoides matsuurae ) in the Okhotsk Sea V. V. Kulik I. I. Glebov N. L. Aseeva R. N. Novikov 2022-07-01T00:00:00Z https://doi.org/10.26428/1606-9919-2022-202-466-497 https://doaj.org/article/a4301f88245143b4bed734abb018be7b RU rus Transactions of the Pacific Research Institute of Fisheries and Oceanography https://izvestiya.tinro-center.ru/jour/article/view/737 https://doaj.org/toc/1606-9919 https://doaj.org/toc/2658-5510 1606-9919 2658-5510 doi:10.26428/1606-9919-2022-202-466-497 https://doaj.org/article/a4301f88245143b4bed734abb018be7b Известия ТИНРО, Vol 202, Iss 2, Pp 466-497 (2022) черный палтус промысловый запас охотское море прибавочная продукция байесовский подход Aquaculture. Fisheries. Angling SH1-691 article 2022 ftdoajarticles https://doi.org/10.26428/1606-9919-2022-202-466-497 2023-09-10T00:44:24Z State of the greenland halibut stock in the Sea of Okhotsk fishing zone is evaluated as overfished with a high probability of 97.5 % by the index of fishable biomass, and the overfishing continued in 2021. This conclusion is based on results of double filtering the posterior parameter estimates in the state-space generalized surplus production model JABBA (Just Another Bayesian Biomass Assessment), with additional tuning of the new model taking into account these results. The overfishing was not caused by significant changes of environmental parameters (average SST and EOF modes of SST were examined), but its main reason was the overestimated target harvest rate established for the Far East of Russia as 10 % of the total biomass or a half of natural annual mortality (20 %). This incorrect value of the rate was based on incorrect determination of age structure and terminal age for the halibut by the fish scale method. The new approach of the stock status evaluation with JABBA model is independent on the age data. It includes the additional filtering of the JABBA model result, its refinement with stringent tuning using the algorithm of No-U-Turn sampler, and checking additional parameters on hyperstability or hypersensitivity. The new reference point of the target harvest rate is between 2.5 and 5.4 % (95 % credible interval) of the total biomass, with a median of about 3.75 %. This new value is slightly higher than that one used by ICES for greenland halibut in the northeastern Atlantic (3.5 % for fishable biomass, its reduction to 2.5 % is discussed), but these values cannot be compared because of different habitat conditions and probably different growth rate of greenland halibut in the Okhotsk Sea and the Atlantic. Researches on the optimal level of greenland halibut exploitation should be continued; anyway, the new reference point of the target harvest rate has to be implemented immediately and to be used at least until correction of the age-length key for greenland halibut in the Okhotsk Sea. The input data ... Article in Journal/Newspaper Greenland okhotsk sea Directory of Open Access Journals: DOAJ Articles Greenland Okhotsk Izvestiya TINRO 202 2 466 497 |
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Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
Russian |
topic |
черный палтус промысловый запас охотское море прибавочная продукция байесовский подход Aquaculture. Fisheries. Angling SH1-691 |
spellingShingle |
черный палтус промысловый запас охотское море прибавочная продукция байесовский подход Aquaculture. Fisheries. Angling SH1-691 V. V. Kulik I. I. Glebov N. L. Aseeva R. N. Novikov Assessment of the stock status for greenland halibut ( Reinhardtius hippoglossoides matsuurae ) in the Okhotsk Sea |
topic_facet |
черный палтус промысловый запас охотское море прибавочная продукция байесовский подход Aquaculture. Fisheries. Angling SH1-691 |
description |
State of the greenland halibut stock in the Sea of Okhotsk fishing zone is evaluated as overfished with a high probability of 97.5 % by the index of fishable biomass, and the overfishing continued in 2021. This conclusion is based on results of double filtering the posterior parameter estimates in the state-space generalized surplus production model JABBA (Just Another Bayesian Biomass Assessment), with additional tuning of the new model taking into account these results. The overfishing was not caused by significant changes of environmental parameters (average SST and EOF modes of SST were examined), but its main reason was the overestimated target harvest rate established for the Far East of Russia as 10 % of the total biomass or a half of natural annual mortality (20 %). This incorrect value of the rate was based on incorrect determination of age structure and terminal age for the halibut by the fish scale method. The new approach of the stock status evaluation with JABBA model is independent on the age data. It includes the additional filtering of the JABBA model result, its refinement with stringent tuning using the algorithm of No-U-Turn sampler, and checking additional parameters on hyperstability or hypersensitivity. The new reference point of the target harvest rate is between 2.5 and 5.4 % (95 % credible interval) of the total biomass, with a median of about 3.75 %. This new value is slightly higher than that one used by ICES for greenland halibut in the northeastern Atlantic (3.5 % for fishable biomass, its reduction to 2.5 % is discussed), but these values cannot be compared because of different habitat conditions and probably different growth rate of greenland halibut in the Okhotsk Sea and the Atlantic. Researches on the optimal level of greenland halibut exploitation should be continued; anyway, the new reference point of the target harvest rate has to be implemented immediately and to be used at least until correction of the age-length key for greenland halibut in the Okhotsk Sea. The input data ... |
format |
Article in Journal/Newspaper |
author |
V. V. Kulik I. I. Glebov N. L. Aseeva R. N. Novikov |
author_facet |
V. V. Kulik I. I. Glebov N. L. Aseeva R. N. Novikov |
author_sort |
V. V. Kulik |
title |
Assessment of the stock status for greenland halibut ( Reinhardtius hippoglossoides matsuurae ) in the Okhotsk Sea |
title_short |
Assessment of the stock status for greenland halibut ( Reinhardtius hippoglossoides matsuurae ) in the Okhotsk Sea |
title_full |
Assessment of the stock status for greenland halibut ( Reinhardtius hippoglossoides matsuurae ) in the Okhotsk Sea |
title_fullStr |
Assessment of the stock status for greenland halibut ( Reinhardtius hippoglossoides matsuurae ) in the Okhotsk Sea |
title_full_unstemmed |
Assessment of the stock status for greenland halibut ( Reinhardtius hippoglossoides matsuurae ) in the Okhotsk Sea |
title_sort |
assessment of the stock status for greenland halibut ( reinhardtius hippoglossoides matsuurae ) in the okhotsk sea |
publisher |
Transactions of the Pacific Research Institute of Fisheries and Oceanography |
publishDate |
2022 |
url |
https://doi.org/10.26428/1606-9919-2022-202-466-497 https://doaj.org/article/a4301f88245143b4bed734abb018be7b |
geographic |
Greenland Okhotsk |
geographic_facet |
Greenland Okhotsk |
genre |
Greenland okhotsk sea |
genre_facet |
Greenland okhotsk sea |
op_source |
Известия ТИНРО, Vol 202, Iss 2, Pp 466-497 (2022) |
op_relation |
https://izvestiya.tinro-center.ru/jour/article/view/737 https://doaj.org/toc/1606-9919 https://doaj.org/toc/2658-5510 1606-9919 2658-5510 doi:10.26428/1606-9919-2022-202-466-497 https://doaj.org/article/a4301f88245143b4bed734abb018be7b |
op_doi |
https://doi.org/10.26428/1606-9919-2022-202-466-497 |
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Izvestiya TINRO |
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