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

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Title Stock assessment of Japanese threadfin bream, Nemipterus japonicus (Bloch, 1791) from Veraval water
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Creator Dash,Swatipriyanka Sen
Dash,Gyanaranjan
Koya,Mohammed
Sreenath,K R
Mojjada,Suresh Kumar
Fofandi,Mahendra
Zala,M S
Kumari,Sonia
 
Subject Nemipterus japonicus
Spawning stock biomass
Stock assessment
Length at maturity
 
Description Not Available
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%.
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Date 2021-09-17T04:37:23Z
2021-09-17T04:37:23Z
2014
 
Type Article
 
Identifier Not Available
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http://krishi.icar.gov.in/jspui/handle/123456789/63621
 
Language English
 
Relation Not Available