Assessing low value crustacean bycatch species using length based bayesian biomass (LBB) method, a tool for data poor fish stock assessment

Kumar, Rajan and Dineshbabu, A P and Rahangdale, Shikha and Vase, Vinay Kumar and Gohel, Jayashree and Solanki, Vipul (2023) Assessing low value crustacean bycatch species using length based bayesian biomass (LBB) method, a tool for data poor fish stock assessment. Turkish Journal of Fisheries and Aquatic Sciences, 23 (3). pp. 1-12. ISSN 2149 - 181X

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Abstract

The majority of tropical fish stocks lack sufficient data for conventional fish stock assessment, making them data-poor fisheries. The status of stock assessment is even more dismal for the low value fishes or crustaceans landed by the trawlers in a significant quantity. Crustaceans like non-edible small crabs (Charybdis spp) and stomatopods form a significant component of the low-value bycatch landed along the northwest coast. Despite the high ecological importance of these groups and the recent declining trend in catches (2007-19), no attempts so far have been made to evaluate the stock status of these groups from the study region. As reliable time series catch and effort data for the individual species are not available, a recently developed length-based approach, LBB (Length Based Bayesian Biomass) estimation method is adopted for the present study. Two of the evaluated stocks, Charybdis hoplites and Miyakella nepa were found abundant (B/BMSY>1.1), whereas Oratosquillina interrupta (B/BMSY=0.94) was found slightly overfished. The sufficient number of larger individuals were found lacking in all three species (L95th/L∞<<1.0). A higher incidence of juveniles in catches was estimated for C. hoplites and O. interrupta (Lmean/Lopt<<1.0).

Item Type:	Article
Uncontrolled Keywords:	Arabian Sea; Sustainability; Trawl fishery; LBB; Bycatch
Subjects:	Marine Fisheries > Fisheries Resources Assessment Marine Fisheries > Fisheries Statistics Crustacean Fisheries Marine Fisheries > Stock Assessment
Divisions:	CMFRI-Kochi > Marine Capture > Shellfish Fisheries Division Subject Area > CMFRI > CMFRI-Kochi > Marine Capture > Shellfish Fisheries Division CMFRI-Kochi > Marine Capture > Shellfish Fisheries Division Subject Area > CMFRI-Kochi > Marine Capture > Shellfish Fisheries Division
Depositing User:	Arun Surendran
Date Deposited:	03 Jan 2024 11:03
Last Modified:	03 Jan 2024 11:03
URI:	http://eprints.cmfri.org.in/id/eprint/17890

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