NISCAIR Online Periodicals Repository

NISCAIR ONLINE PERIODICALS REPOSITORY (NOPR)  >
NISCAIR PUBLICATIONS >
Research Journals >
Indian Journal of Geo-Marine Sciences (IJMS) >
IJMS Vol.32 [2003] >
IJMS Vol.32(3) [September 2003] >


Title: Length-weight relationship and relative condition of a silver biddy Gerres oblongus (Pisces: Perciformes) from the Jaffna lagoon, Sri Lanka
Authors: Sivashanthini, K.
Abeyrami, B.
Keywords: Length-weight relationship
silver-biddy
relative condition
Gerres oblongus
covariance analysis
spawning
Issue Date: Sep-2003
Publisher: CSIR
Abstract: Cultivation of Gerres oblongus is likely to be profitable because of the consumer demand. The values obtained for the mean weight by sex show that females were significantly (P<0.05) larger than males. Covariance analysis for length–weight relationships of male and female fishes reveals that there was significant variation between male and female fishes (P<0.05). The calculated length-weight relationships of W = 0.01127 x L2.958 and W = 0.015319 x L 3.126, obtained for males and females respectively. The exponent value, b=2.958 for males and b=3.126 for females, not significant from 3 (P>0.05) reflect an almost isometric growth in both instances. The relative condition of fish showed seasonal variation. The highest median values of average condition factor recorded from 175 to 225 mm total length clearly shows that G. oblongus would be in good condition if harvested at this total length range. Males, generally are in better condition than females. The low relative condition values in February to June indicate female G. oblongus spawn during February to June during which the breeding stock should be protected in order to maintain the sustainable exploitation of this species.
Page(s): 252-254
ISSN: 0379-5136
Source:IJMS Vol.32(3) [September 2003]

Files in This Item:

File Description SizeFormat
IJMS 32(3) 252-254.pdf74.71 kBAdobe PDFView/Open
 Current Page Visits: 609 
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: 636720 since 06-Feb-2009  Last updated on 15-Dec-2014Webmaster: nopr@niscair.res.in