
	Journal of Fisheries and Aquatic Science
	Year: 2011 \| Volume: 6 \| Issue: 6 \| Page No.: 592-603 DOI: 10.3923/jfas.2011.592.603

Growth Characteristics of Slender Silver-biddies Gerres oblongus (Pisces: Perciformes) from the Jaffna Lagoon, Sri Lanka

S. Shutharshan and K. Sivashanthini

Abstract: The present study was carried out to understand the growth parameters of the slender silver biddy Gerres oblongus. Growth parameters of G. oblongus such as asymptotic length (L_∞), growth coefficient (K) and age at zero length (‘t₀’) were estimated through the appropriate routines of the FiSAT II software from the length frequency data. The optimized values for K and L_∞ obtained by the ELEFAN I routine was 1.0 year^-1 and 29.4 cm. The estimated ‘t₀’ value was -0.151. The Powell-Wetherall plot gave a Z/K value of 3.851. The estimated growth performance index (Ø) was 2.93. The von Bertalanffy’s growth equation for G. oblongus can be expressed as L_t = 29.4 [1-exp {-1.0 (t+0.159)}]. Estimated longevity for G. oblongus calculated from Pauly’s equation was 2.84. The growth parameters obtained in the present study are useful fundamental indicators for the population dynamics studies of the G. oblongus.

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How to cite this article:

S. Shutharshan and K. Sivashanthini, 2011. Growth Characteristics of Slender Silver-biddies Gerres oblongus (Pisces: Perciformes) from the Jaffna Lagoon, Sri Lanka. Journal of Fisheries and Aquatic Science, 6: 592-603.

DOI: 10.3923/jfas.2011.592.603

URL: https://scialert.net/abstract/?doi=jfas.2011.592.603

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