NISCAIR Online Periodicals Repository

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]

Files in This Item:

File Description SizeFormat
IJMS 40(5) 680-686.pdf341.62 kBAdobe PDFView/Open
 Current Page Visits: 431 
Recommend this item

 

National Knowledge Resources Consortium |  NISCAIR Website |  Contact us |  Feedback

Disclaimer: NISCAIR assumes no responsibility for the statements and opinions advanced by contributors. The editorial staff in its work of examining papers received for publication is helped, in an honorary capacity, by many distinguished engineers and scientists.

CC License Except where otherwise noted, the Articles on this site are licensed under Creative Commons License: CC Attribution-Noncommercial-No Derivative Works 2.5 India

Copyright © 2012 The Council of Scientific and Industrial Research, New Delhi. All rights reserved.

Powered by DSpace Copyright © 2002-2007 MIT and Hewlett-Packard | Compliant to OAI-PMH V 2.0

Home Page Total Visits: 510268 since 06-Feb-2009  Last updated on 11-Apr-2014Webmaster: nopr@niscair.res.in