International Journal of Environmental Sciences

Volume 2 Issue 3 2012           Pages: 1239- 1244

Length Weight Relationship (LWR), Growth estimation and Length at maturity of Etroplus suratensis in Chilika Lagoon, Orissa, India

Author Information:

Subodha Kumar Karna- - Department of Zoology, Utkal University, Vani Vihar, Bhubaneswar, Orissa, India

Dillip Sahoo- - Department of Zoology, Utkal University, Vani Vihar, Bhubaneswar, Orissa, India

Sudarsan Panda - Department of Zoology, MLB College Bhopal

ABSTRACT

The growth features of a commercially important fish species, i.e. Etroplus suratensis (local name “Kundala”) was studied in the Chilika Lagoon. In total, 4192 of E. suratensis samples were measured with their total length during the period of June 2008 to May 2009. Different cohorts were identified through multiple length frequency analysis on the total length of these species and their growth curves were estimated. The estimated growth parameters like, Linf (cm), K, and t0 was 33.7cm, 0.20, and 0.01 for the species respectively. Length at 50% maturity (L50) of the fish samples was also examined. The estimated L50 for E. suratensis was 165mm (TL). Length-weight relationship (LWR) of Etroplus suratensis also estimated and the equation found y = 1E-05x3.134 (n=118) for male, y = 3E-05x2.998 (n=184) for female and y=2E-05X3.101 (n=302) as unsexed samples. Here the computed growth coefficient (b) was 3.134, 2.998 and 3.101, where the regression coefficient (r2) was 0.982, 0.96 and 0.977 for male, female and unsexed samples respectively.

Keywords :

Etroplus suratensis, growth estimation, length at maturity, L50, Chilika Lagoon.

DOI: 10.6088/ijes.00202030012


© 2012 Copyright Subodha Kumar Karna et al, licensee IPA.This is an open access article distributed under the Creative Commons Attribution License (2.0) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. The electronic version of the article can be downloaded below.

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