Impact of mini trawl fishing on the population of alligator pipefish Syngnathoides biaculeatus bloch (1785) caught as bycatch from the seagrass meadows of Palk bay, southeast coast of India

Thirumalaiselvan, S and Rajkumar, M and Vinothkumar, R and Remya, L and Batcha, S M Sikkander and Kaladharan, P (2022) Impact of mini trawl fishing on the population of alligator pipefish Syngnathoides biaculeatus bloch (1785) caught as bycatch from the seagrass meadows of Palk bay, southeast coast of India. Environment and Ecology, 40 (4A). pp. 2228-2234. ISSN 0970-0420

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Abstract

Seagrass meadows are a highly productive ecosystem providing habitat, breeding and feeding ground for various marine species and also support the fisheries. The single species S. biaculeatus is the most dominant pipefish among Syngnathoids in Palk Bay. Periodic monitoring and observation of bycatch and discards, of the alligator pipefish Syngnathoides biaculeatus, caught in Mini trawl from Devipattinam for one year formed the basis of this communication. The size range of alligator pipefish was recorded between 128 mm to 240 mm and individual weight ranged from 1.42 to 6.60 g. The maximum numbers of Pipefish were recorded during July 2017. There is no significant difference in b values (P > 0.05) and K values between male and female. In the present study, population of pipefish S. biaculeatus have shown negative allometric growth pattern (b = 1.92). Fishing by Mini trawl in the inshore region of seagrass meadows has harshly affected the alligator pipefish population and its habitat. Mesh size regulation and its strict implementation will be the required management measures to ensure the sustainability of the pipefish population in the seagrass meadows of the Palk Bay

Item Type:	Article
Uncontrolled Keywords:	Allometric growth; Devipattinam; Discards; Alligator pipefish; Population
Subjects:	Marine Botany > Seagrass Demersal Fishes Demersal Fishes > Seahorse
Divisions:	CMFRI-Mandapam CMFRI-Kochi > Fishery Environment Management Division Subject Area > CMFRI > CMFRI-Kochi > Fishery Environment Management Division CMFRI-Kochi > Fishery Environment Management Division Subject Area > CMFRI-Kochi > Fishery Environment Management Division
Depositing User:	Arun Surendran
Date Deposited:	06 Jan 2023 12:02
Last Modified:	06 Jan 2023 12:02
URI:	http://eprints.cmfri.org.in/id/eprint/16591

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