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Stock assessment of Japanese threadfin bream, Nemipterus japonicus (Bloch, 1791) from Veraval water

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Relation http://eprints.cmfri.org.in/10044/
 
Title Stock assessment of Japanese threadfin bream, Nemipterus japonicus (Bloch, 1791) from Veraval water
 
Creator Dash, Swatipriyanka Sen
Dash, Gyanaranjan
Koya, Mohammed
Sreenath, K R
Mojjada, Suresh Kumar
Fofandi, Mahendra
Zala, M S
Kumari, Sonia
 
Subject Threadfin breams
 
Description Fishery, population characteristics and stock estimates of Nemipterus japonicus was studied during 2006-2010 from Veraval water. Average annual landing was 5,577 t, which contributed to 4.49 % to the total trawl landings. Length-weight relationship showed growth was allometric for the species. L∞, K and t0 were estimated as 345.6 mm, 0.60/year and -0.1132 year. Total mortality rate (Z), fishing mortality rate and natural mortality rate (M) were estimated as 4.02/yr, 2.82/yr and 1.2/yr respectively. Exploitation ratio (E) was found to be 0.70 which showed overexploitation of the species. Length at capture and length at maturity were estimated as 165.47 mm and 180 mm respectively. Recruitment of the species was continuous with a peak in June. Thompson and Bell prediction analysis showed at present fishing level, there is depletion in the initial biomass, spawning stock biomass giving less revenue. Hence it is advisable to reduce the effort by 20%.
 
Date 2014
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
Identifier http://eprints.cmfri.org.in/10044/1/IJMS_43%284%29Swatipriyankasen_Dash.pdf
Dash, Swatipriyanka Sen and Dash, Gyanaranjan and Koya, Mohammed and Sreenath, K R and Mojjada, Suresh Kumar and Fofandi, Mahendra and Zala, M S and Kumari, Sonia (2014) Stock assessment of Japanese threadfin bream, Nemipterus japonicus (Bloch, 1791) from Veraval water. Indian Journal of Geo-Marine Sciences, 43 (4). 519`-527.