Morphometry and Life-Stage Wise Length–Weight Relationships of, Labeo gonius (Hamilton–Buchanan, 1822), Under Captive Condition

Labeo gonius is a commercially important and potential candidate species for aquaculture systems. Our study aims to determine its morphometric character s , meristic counts, and life-stage wise length–weight relationships under captive condition. All morphometric characters are significantly correlated with total length and head length. The total length has the maximum degree of correlation with standard length ( r = 0.991), whereas head length has with inter-orbital length ( r = 0.902). Meristic counts indicated that the maximum coefficients of variation were for the gill rakers (8.51%), while lowest for ventral fin rays (1.10%). Gill rakers are more numerous in the species which varied from the 41 to 71. The length–weight relationship was established as W = 0.0015*L 1.2836 ( r 2 = 0.696) for fry, W = 0.000036*L 2.8271 ( r 2 = 0.7163) for fingerlings, W = 0.000008*L 3.0924 ( r 2 = 0.9358) for juveniles, and W = 0.00006*L 3.1726 ( r 2 = 0.9453) for adults. Negative allometric growth patterns were observed for fry and fingerlings ( b < 3), whereas positive for juveniles and adults ( b > 3). All the estimated physiochemical water quality parameters are within the permissible limit.