Morphometric relationships of the endangered ticto barb Pethia ticto (Hamilton,1822) in the Ganges River (NW Bangladesh) through multi-linear dimensions

The present study illustrates the morphometric relationships including length-weight relationships (lwrs) and length-length relationships (llrs) using a total of 13 linear dimensions and meristic characters of the threatened ticto barb pethia ticto (hamilton,1822) in the ganges river through multi-linear dimensions. a sum of 100 specimen of p. ticto was sampled occasionally from the ganges river during july 2014 to october 2015,using various traditional fishing gears (e.g.,cast,gill,and square lift net). counts of fin rays and scales (including lateral line scale) were done by a magnifying glass. additionally,here total 14 different morphometric lengths were assessed to 0.1 cm,and body weight (bw) was measured to the nearest 0.1 g for each individual. the fin formula of p. ticto is: dorsal,d. 10-11 (ii/8-9); pectoral,p1. 12 (ii/10); pelvic,p2. 8- 9 (ii/6-7); anal,a. 7-8 (ii/5-6); and caudal,c. 20-24 (iv /16-20),respectively. total length (tl) was recorded as minimum (4.9 cm) and maximum (9.5 cm),whereas body weight (bw) was varied from 1.5-12.9 g. all lwrs were highly significant (p < 0.001) with r2 values ≥ 0.987. based on r2 value,lwr by bw vs. tl was the best-fitted model among 14 equations. in addition,the llrs had also significance with r2 values ≥ 0.986. according to r2 values,llr by tl vs. fl was the best-fitted model among 13 equations. the present study is very effective for species recognition in the ganges river,nw bangladesh and in other river systems in its vicinity. © 2017 jordan journal of biological sciences.