Estimation of relative growth of anabas testudineus through multiple linear dimensions

Abstract

This study provides scientific investigation on the relative growth pattern based on multiple linear dimensions and also observed the meristic characteristics of Anabas testudineus from the Gajner Beel northwestern (NW) Bangladesh from July to December 2018. A total of 454 individuals were collected and lengths and weight were noted up to 0.01 cm and 0.01g precision using a measuring board and digital weight balance, respectively. Fin rays and lateral line scales were counted by using a magnifying glass. Total length (TL) was ranged 7.40–14.50 cm while body weight (BW) ranged 7.90–64.00 g. Relationships of length-weight (LWRs) were highly significant (p<0.001) with r2 values ≥ 0.823. TL vs. BW was one of the best models among ten equations based on r2 value in LWR. In comparison, length-length relationships (LLRs) were extremely important (p<0.001) and most of the r2 values were greater than 0.844. In LLR, SL vs. TL and PoAnL was the fitted model according to r2 value among nine equations. Fin formula of A. testudineus was D. 26-28 (XVI-XVIII 1-2/7-10) P1. 13-15 (1-2/11-14) P2. 6 (I5) A. 18-21 (VIII-XI1 2/8-10) C. 15-17 (2/13-15).The results of this study will keep a vital contribution to stock assessment and sustainable management for A. testudineus in this wetland ecosystem and other world wide water bodies.