Population dynamics of the geographically defined metapopulations of brown shrimp Metapenaeus monoceros (Fabricius, 1798) from Indian waters

Dineshbabu, A P and Sarada, P T and Maheswarudu, G and Pillai, S Lakshmi and Dash, Gyanaranjan and Divipala, Indira and Kumar, Rajan and Chakraborty, Rekha D and Rajkumar, M and Jayasankar, J and Ratheesh Kumar, R and Saleela, K N and Naik, Rajendra and Josileen, Jose (2022) Population dynamics of the geographically defined metapopulations of brown shrimp Metapenaeus monoceros (Fabricius, 1798) from Indian waters. Indian Journal of Fisheries, 69 (4). pp. 1-13. ISSN 0970 - 6011

Text Indian Journal of Fisheries_2022_S Lakshmi Pillai.pdf Download (2MB)

Abstract

Population dynamics of the brown shrimp Metapenaeus monoceros (Fabricius, 1798) was studied along the Indian coast using catch and effort data of trawlers from 8 States and 2 Union Territories for the period 2007-2015. Classical length-based stock assessment methods and spatial database of the shrimp catch were used to derive fishing ground related conclusions. Inclusion of spatial data revealed the possibility of existence of metapopulations of M. monoceros in the region. Maximum sustainable yield (MSY) cannot be a reasonable reference point for deciding the fishing pressure in M. monoceros. By analysing stock fluctuations noticed during the study period with varying spawning stock biomass combinations, retention of 40% spawning biomass seems to be a safe option for sustaining M. monoceros production from Indian waters. Based on this, the study recommends reduction of fishing pressure along north-west, south-west and northeast coast by 70, 60 and 70% respectively from the base level of effort in 2017. The study illustrates that the spatial data from fishing ground, can serve as an additional tool to derive management options. The study also emphasises the need for further investigations on the possibilities of metapopulations of M. monoceros which is widely distributed in all agro-climatic zones along the Indian coast.

Item Type:	Article
Uncontrolled Keywords:	Indian coast; Metapopulation; M. monoceros; Spatial study; Stock assessment
Subjects:	Marine Fisheries > Population Dynamics Crustacean Fisheries Crustacean Fisheries > Prawn and Prawn fisheries
Divisions:	CMFRI-Kochi > Marine Capture > Crustacean Fisheries Division Subject Area > CMFRI > CMFRI-Kochi > Marine Capture > Crustacean Fisheries Division CMFRI-Kochi > Marine Capture > Crustacean Fisheries Division Subject Area > CMFRI-Kochi > Marine Capture > Crustacean Fisheries Division
Depositing User:	Arun Surendran
Date Deposited:	03 Jan 2023 04:45
Last Modified:	25 Jan 2023 09:54
URI:	http://eprints.cmfri.org.in/id/eprint/16587

Actions (login required)

View Item