Morphometric parameters based study of the hatchery raised and natural populations of Labeo rohita.

The variation amongst the different populations of Labeo rohita on the basis of morphometric parameters was studied. Samples were collected from different geographical locations and representatives of the farmed and natural populations pertaining to four riverine sites and compared with one hatchery population. Data regarding the morphogenetic parameters viz., body weight, fork length, total length and lengths of dorsal, caudal, anal, pectoral and pelvic fins of each individual were measured. Analysis of variance (ANOVA) for the different morphometric parameters of study was done using Minitab 16.0. The Pearson correlation analysis of the morphometric parameters was done by XLSTAT 2012 version 1.02. The results indicated that the body weight, total length and average length of paired pectoral fins of L. rohita were non-significantly different (P> 0.05), anal fin length was significantly different (P<0.05), and all the remaining parameters were highly significantly different (P<0.01) among the sites. The correlation of fish body weight and fork length was highly significant (p<0.001) and positive with all the parameters except with the caudal fin which was positively but non-significant in correlation with fork length (p = 161). The observations on the morphometric parameters and the condition factor for Labeo rohita, showed that population of the target species collected from Qadirabd Barrage on the Chenab River was the best.