ANALYSIS OF FISHING PRESSURE BY DEMERSAL TRAWLING ON CERTAIN COMMERCIALLY IMPORTANT FINFISHES ALONG KANYAKUMARI COAST
Loading...
Files
Date
2015
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Fisheries College and Research Institute, Thoothukudi, Tamil Nadu Dr. J. Jayalalithaa Fisheries University
Abstract
A study was undertaken to analyze the fishing pressure on ten commercially important finfishes along Kanyakumari coast owing to the operation of demersal trawl nets. The study was under taken for one year from June 2010 to April 2011. The length frequency and catch effort data were collected for ten commercially important finfish species viz. Scomberomorus commerson, Aluterus monoceros, phyraena jello, Saurida tumbil, Nemipterus japonicus, Parupeneus indicus, Rastrelliger kanagurta, Scolopsis bimaculatus, Lethrinus lentjan, and Stolephorus indicus. Apart from them, 65 finfishes were reported to form notable fishery in the trawl nets of Chinnamuttom fishing harbour. Fishing pressure was analyzed using the computer software FiSAT II on the selected ten commercially important finfish species. Length at first maturity was worked out for all the ten species taken for study. The study revealed that a complete change in the trawl fleet structure and trawl net designs have been taken place over the past eight years. Further scope for increasing fishing effort to capture Nemipterus japonicus and Aulterus monoceros was evidenced from the very low exploitation ratios of 0.072 and 0.086 respectively. Sphyraena jello was found to suffer both due to growth and recruitment over fishing. The study revealed the existence of recruitment over fishing for five species viz. Saurida tumbil, Nemipterus japonicus, Rastrelliger kanagurta, Scolopsis bimaculatus and Stolephorus indicus due to the operation of trawl nets along Kanyakumari coast. The study suggested for revising the closed season from 1st April to 31st May to reduce the risk of recruitment over fishing on many commercially important finfishes due to trawling along Kanyakumari coast.
Description
Keywords
null