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<span style="font-size:15.0pt;font-family: "Times New Roman";mso-fareast-font-family:"Times New Roman";mso-bidi-font-family: Mangal;mso-ansi-language:EN-GB;mso-fareast-language:EN-US;mso-bidi-language: HI" lang="EN-GB">Stock assessment of Japanese threadfin bream, <i style="mso-bidi-font-style: normal">Nemipterus japonicus</i> (Bloch, 1791) from Veraval water</span>

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Title Stock assessment of Japanese threadfin bream, Nemipterus japonicus (Bloch, 1791) from Veraval water
 
Creator Sen, Swatipriyanka
Dash, G.R.
Mohammed, Koya K.
Sreenath, K.R.
Mojjada, Suresh Kumar
Fofandi, Mahendra Kumar
Zala, M.S.
Kumari, Sonia
 
Subject Nemipterus japonicus
Spawning stock biomass
Stock assessment
Length at maturity
 
Description 519-527
 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 2014-04-23T09:54:59Z
2014-04-23T09:54:59Z
2014-04
 
Type Article
 
Identifier 0975-1033 (Online); 0379-5136 (Print)
http://hdl.handle.net/123456789/28641
 
Language en_US
 
Rights CC Attribution-Noncommercial-No Derivative Works 2.5 India
 
Publisher NISCAIR-CSIR, India
 
Source IJMS Vol.43(4) [April 2014]