Standardization of landing efficiency for opilio crab in the western Bering Sea by using of generalized additive models
Generalized additive models are applied for standardization of daily landing per unit effort (LPUE) for opilio crab using the data of fishery statistics for the West Bering Sea fishery zone in 2003–2020. A set of 12 models with various combinations of predictors was examined and the best model with...
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| Format: | Article |
| Language: | Russian |
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Transactions of the Pacific Research Institute of Fisheries and Oceanography
2021-07-01
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| Series: | Известия ТИНРО |
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| Online Access: | https://izvestiya.tinro-center.ru/jour/article/view/633 |
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| author | I. S. Chernienko |
| author_facet | I. S. Chernienko |
| author_sort | I. S. Chernienko |
| collection | DOAJ |
| description | Generalized additive models are applied for standardization of daily landing per unit effort (LPUE) for opilio crab using the data of fishery statistics for the West Bering Sea fishery zone in 2003–2020. A set of 12 models with various combinations of predictors was examined and the best model with the smallest value of Akaike criterion was selected (information criterion Akaike 21743, explained variance 58.6 %). The selected model reflects the effect of depth, distance from the coast, daily effort and tensor product of geographic coordinates and day of the year. LPUE was standardized using the selected model by substituting median values of nominal predictors and modal values of categorical predictors. Then the crab stock was estimated using the state-space form of Deriso-Schnute delay-difference model. The estimates based on both standardized and nominal indices are compared and a significant difference between them is found: the stock is assessed as 23,040 t with nominal indices but as 17,070 t using the standardized indices. |
| format | Article |
| id | doaj-art-b22172be36e6464299c186d2bf54ec0c |
| institution | Kabale University |
| issn | 1606-9919 2658-5510 |
| language | Russian |
| publishDate | 2021-07-01 |
| publisher | Transactions of the Pacific Research Institute of Fisheries and Oceanography |
| record_format | Article |
| series | Известия ТИНРО |
| spelling | doaj-art-b22172be36e6464299c186d2bf54ec0c2025-08-20T03:59:16ZrusTransactions of the Pacific Research Institute of Fisheries and OceanographyИзвестия ТИНРО1606-99192658-55102021-07-01201235937010.26428/1606-9919-2021-201-359-370580Standardization of landing efficiency for opilio crab in the western Bering Sea by using of generalized additive modelsI. S. Chernienko0VNIRO (TINRO)Generalized additive models are applied for standardization of daily landing per unit effort (LPUE) for opilio crab using the data of fishery statistics for the West Bering Sea fishery zone in 2003–2020. A set of 12 models with various combinations of predictors was examined and the best model with the smallest value of Akaike criterion was selected (information criterion Akaike 21743, explained variance 58.6 %). The selected model reflects the effect of depth, distance from the coast, daily effort and tensor product of geographic coordinates and day of the year. LPUE was standardized using the selected model by substituting median values of nominal predictors and modal values of categorical predictors. Then the crab stock was estimated using the state-space form of Deriso-Schnute delay-difference model. The estimates based on both standardized and nominal indices are compared and a significant difference between them is found: the stock is assessed as 23,040 t with nominal indices but as 17,070 t using the standardized indices.https://izvestiya.tinro-center.ru/jour/article/view/633fishery statisticsabundance indexcatch standardizationgeneralized additive modelbering seasnow crab |
| spellingShingle | I. S. Chernienko Standardization of landing efficiency for opilio crab in the western Bering Sea by using of generalized additive models Известия ТИНРО fishery statistics abundance index catch standardization generalized additive model bering sea snow crab |
| title | Standardization of landing efficiency for opilio crab in the western Bering Sea by using of generalized additive models |
| title_full | Standardization of landing efficiency for opilio crab in the western Bering Sea by using of generalized additive models |
| title_fullStr | Standardization of landing efficiency for opilio crab in the western Bering Sea by using of generalized additive models |
| title_full_unstemmed | Standardization of landing efficiency for opilio crab in the western Bering Sea by using of generalized additive models |
| title_short | Standardization of landing efficiency for opilio crab in the western Bering Sea by using of generalized additive models |
| title_sort | standardization of landing efficiency for opilio crab in the western bering sea by using of generalized additive models |
| topic | fishery statistics abundance index catch standardization generalized additive model bering sea snow crab |
| url | https://izvestiya.tinro-center.ru/jour/article/view/633 |
| work_keys_str_mv | AT ischernienko standardizationoflandingefficiencyforopiliocrabinthewesternberingseabyusingofgeneralizedadditivemodels |