Estimation of Maximum Sustainable Yield for Lesser Sciaenids Fishery of North-Eastern Arabian Sea using Surplus Production Model with Environmental Effects

Rahangdale, Shikha and Vase, Vinay Kumar and Zacharia, P U (2022) Estimation of Maximum Sustainable Yield for Lesser Sciaenids Fishery of North-Eastern Arabian Sea using Surplus Production Model with Environmental Effects. Journal of Ichthyology. ISSN 1555-6425

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Abstract

Fishes of family Sciaenidae, popularly known as croakers, form a major fishery along the north-west coast of India. In general, sciaenids can be divided in to two major groups based on size viz. larger sciaenids and lesser sciaenids. The lesser sciaenids belong to genus Pennahia, Otolithes, Nibea and Johnius and are mostly harvested by trawlers, multiday dolnetters and outboard OBGN. These gears together accounted for over 90% of the total catch of small- and medium-sized croakers (lesser sciaenids) over a period of 2007–2018. The study was conducted to estimate the gear wise maximum sustainable yield for the lesser sciaenids. The conventional fox model and derived fox model with non-linear effect of environmental parameters were attempted with two environmental variables: annual chlorophyll-a and SST. Incorporating chlorophyll-a in the model improves the model fit by nearly 10% in case of multiday dolnetters, whereas the SST improves the model output of outboard OBGN by nearly 11%. No major improvements in model fit were observed in case of trawlers. The cumulative maximum sustainable yield estimated by opting best fitted models for each gear was almost 49 000 t, which was marginally higher than the estimates by conventional Fox model.

Item Type:	Article
Uncontrolled Keywords:	sea surface temperature; chlorophyll-a; Freon model; Fox model
Subjects:	Marine Fisheries > Fisheries Management Aquaculture > Fisheries Management Marine Environment Marine Environment > Seawater Analysis Marine Fisheries > Trophic Modelling
Divisions:	CMFRI-Kochi > Marine Capture > Demersal Fisheries Division Subject Area > CMFRI > CMFRI-Kochi > Marine Capture > Demersal Fisheries Division CMFRI-Kochi > Marine Capture > Demersal Fisheries Division Subject Area > CMFRI-Kochi > Marine Capture > Demersal Fisheries Division
Depositing User:	Arun Surendran
Date Deposited:	15 Jan 2024 09:16
Last Modified:	15 Jan 2024 09:16
URI:	http://eprints.cmfri.org.in/id/eprint/17935

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