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NISCAIR ONLINE PERIODICALS REPOSITORY (NOPR) >
NISCAIR PUBLICATIONS >
Research Journals >
Indian Journal of Geo-Marine Sciences (IJMS) >
IJMS Vol.40 [2011] >
IJMS Vol.40(5) [October 2011] >
| Title: | Stock assessment of the Indian scad, Decapterus russelli (Ruppell, 1830) from Mumbai waters |
| Authors: | Poojary, Nalini
Tiwari, L.R.
Chakraborty, S.K. |
| Keywords: | D. russelli
Indian Scad
Stock assessment
Growth
Mortality |
| Issue Date: | Oct-2011 |
| Publisher: | NISCAIR-CSIR, India |
| Abstract: | 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 |
| Page(s): | 680-686 |
| CC License: |  CC Attribution-Noncommercial-No Derivative Works 2.5 India |
| ISSN: | 0975-1033 (Online); 0379-5136 (Print) |
| Source: | IJMS Vol.40(5) [October 2011]
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