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Stock assessment of the Indian scad, <i style="">Decapterus russelli</i> (Ruppell, 1830) from Mumbai waters

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Title Stock assessment of the Indian scad, Decapterus russelli (Ruppell, 1830) from Mumbai waters
 
Creator Poojary, Nalini
Tiwari, L.R.
Chakraborty, S.K.
 
Subject D. russelli
Indian Scad
Stock assessment
Growth
Mortality
 
Description 680-686
Present study consists the Growth, mortality and the
stock assessment of Decapterus russelli
. ‘L∞’ was estimated as 277 mm and ‘K’ as 1.237/year. The to estimated by VBGF plot was – 0.3443
year. Growth in length of D. russelli
described following von Bertalanffy growth equation as, Lt = 277[
1-e -1.237{t-(-0.3443)}]. Longevity was estimated to be 2.42 years.
Total mortality rate (Z), natural mortality rate (M) and fishing mortality (F)
were estimated to be 6.66, 2.1 and 4.56 respectively. In this study, Z/K was
found to be 5.38 indicating that the stock of D. russelli is presently mortality dominated in Mumbai waters. Exploitation
rate (U) was calculated as 0.6838 and the Exploitation ratio (F/Z) as 0.6847.
Thompson and Bell
long-term prediction analysis indicated that there is no decline in yield of D. russelli even if the fishing effort
is doubled. Present level of fishing has no deleterious effect on the fishery
of D. russelli
 
Date 2011-11-18T04:29:37Z
2011-11-18T04:29:37Z
2011-10
 
Type Article
 
Identifier 0975-1033 (Online); 0379-5136 (Print)
http://hdl.handle.net/123456789/13080
 
Language en_US
 
Rights CC Attribution-Noncommercial-No Derivative Works 2.5 India
 
Publisher NISCAIR-CSIR, India
 
Source IJMS Vol.40(5) [October 2011]