Fishery Appraisal of Narrow-barred Spanish Mackerel Scomberomorus commerson (Lacepède 1800) Using Surplus Production Models From Tamil Nadu, India Waters
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R. Abinaya [1] ; M. K. Sajeevan [1]
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[1] University of Fisheries and Ocean Studies, Kerala, India
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- Localización: Thalassas: An international journal of marine sciences, ISSN 0212-5919, Vol. 39, Nº. 1, 2023, págs. 15-26
- Idioma: inglés
- Texto completo no disponible (Saber más ...)
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Resumen
Narrow-barred Spanish mackerel Scomberomorus commerson (Lacepède 1800) of Tamil Nadu, India waters is a data defcient fshery. Except for time series data on landings, no other information on its stock status is available. The present study reconstructed its catch and efort data from 2001 to 2020. The maximum sustainable yield (MSY) of narrow-barred Spanish mackerel fshery was estimated using Catch and Efort Data Analysis (CEDA) software based on the catch and efort data from Tamil Nadu, India waters. MSY was computed by CEDA software using an initial proportion (IP) value of 0.4, and the result of MSY from Fox models with normal, log-normal, and gamma error assumptions was 6,035 metric tonnes (MT), 6,371 MT, and 7,110 MT, respectively. The output of normal and log-normal error assumptions was 8,792 MT and 7,195 MT in Schaefer and Pella Tomlinson models. The Schaefer-normal model was selected as the best-ftted model based on the high R2 result, the strong trends in a residual plot, and other management quantities. The MSY of the narrow-barred Spanish mackerel fshery calculated using the Schaefer-normal model was almost equal to the average annual catch (8,229 MT) and greater than the most recent catch (6,927 MT). Data analysis using three surplus production models revealed that the stock was fully exploited and the fshery was overcapitalized. Based on the biological reference points and stock biomass projection, the present study recommends a 30% reduction of current fshing eforts to ensure sustainable fshery of narrow-barred Spanish mackerel in Tamil Nadu waters
