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Length-based assessment of penaeid shrimp fishery stocks along the north-eastern Arabian Sea

Indian Agricultural Research Journals

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Title Length-based assessment of penaeid shrimp fishery stocks along the north-eastern Arabian Sea
 
Creator kumar, Rajan
Dash, Gyanranjan
P. T. Sarada
Rahangdale, Shikha
Vase, Vinayakumar
Solanki, Vipul
Gohel, Jayshree
 
Description Penaeid shrimps are a key resource in marine fisheries and are of great ecological and economic importance. The north-west (NW) coast of India contributes significantly (~30%) to the penaeid shrimp landings in India. Four species of penaeid shrimps, namelyParapenaeopsis stylifera, Solenocera crassicornis, Metapenaeus affinis, and M. monoceros, were assessed using Length-based spawning potential ratio (SPR) based on the length frequency data collected during 2017-21, from commercial trawlers operating in the depth range of 20-100 m along the north-west coast of India bordering the north-eastern Arabian Sea. The current status (2021) of P. stylifera, S. crassicornis and M. affinis was found to be healthy, with a spawning potential ratio of ≥ 0.40. For M. monoceros, the SPR was slightly below 0.40 (0.34-35), however, considering the fast growth and short generation time for the resources, the stock status can be considered fair. Significant reduction in fishing pressure (F/M < 1.0) and increase in SPR (>0.40) during COVID-19 affected years (2020-21) were evident. The reduction in fishing hours during the pandemic has allowed the resource to regain the target reference point (TRP) for SPR. Declining catches over the past decade for the group are not due to resource depletion but for the shift in species preference and the diversification of trawls in the region, with bottom trawling giving way to pelagic trawling.
 
Keywords: Sustainability, Spawning potential ratio, COVID-19, Penaeid shrimps
 
Publisher Central Marine Fisheries Research Institute (on behalf of Indian Council of Agricultural
 
Date 2024-09-30
 
Type info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
 
Format application/pdf
 
Identifier https://epubs.icar.org.in/index.php/IJF/article/view/147045
10.21077/ijf.2024.71.3.147045-01
 
Source Indian Journal of Fisheries; Vol. 71 No. 3 (2024)
0970-6011
 
Language eng
 
Relation https://epubs.icar.org.in/index.php/IJF/article/view/147045/56034
 
Rights Copyright (c) 2024 Indian Journal of Fisheries
https://creativecommons.org/licenses/by-nd/4.0