Abstract
A total of 900 individuals (pre-monsoon = 250, monsoon = 350, post-monsoon = 300) of P. paradiseus were collected from the fishers catches during January to December 2014. For each individual, TL (total length) and BW (body weight) were measured with 0.1 cm and 0.1 g accuracy, respectively. Length weight relationship (LWR) was estimated by the equation, W = a x L-b. Length-frequency distributions (LFD) were significantly different between the seasons (P < 0.001). Allometric coefficient (b values) of LWRs (TL vs. BW) indicated isometric growth in pre-monsoon and post-monsoon (b 3), but negative allometric growth was found in monsoon (b < 3). All LWRs were highly significant (P < 0.001) with all r(2) values >= 0.984. The LWRs were significantly difference between the seasons (ANCOVA, P < 0.001). The K-F is highly correlated with TL (Spearman rank test, P < 0.001) in all the seasons, thus suggesting the best condition factor for assessing the wellbeing of this fish in our study area: Additionally, the W-R was significantly different from 100 (Wilcoxon rank test, P = 0.003) in pre-monsoon, which indicates the habitat was in poor condition for P. paradiseus, nevertheless it was not significantly differed in monsoon (P = 0.0186) and post-monsoon (P = 0.423). The calculated L-m was 12.1 cm in TL and form factor was 0.0061 for P. paradiseus in the Tetulia River.