Population Parameters and Length-Weight relationship of striped piggy (Pomadays stridens) in northwest of Persian Gulf (Khuzestan Coastal Waters, Iran)

During this study from December 2009 to November 2011, 396 striped piggy fish were caught and their weight and length were measured. Total number of caught fishes included, 101 males, 246 females and 49 immature fishes. The Mean, maximum and minimum total lengths were 196±78, 235 mm and 111 mm respectively. The Mean, maximum and minimum total weight for this species was 110±89 gr, 26 gr and 234gr respectively. The length-weight relationship were calculated as W=0.00003FL2.88 (n=100, R2= 0.90) for females,W=0.00008FL2.66 (n=101, R2=0.80) for males and W=0.000009FL3.04 (n=100, R2 =0.89) for total fishes verifying calculated b with 3, using Students t-test there was significant difference between calculated b and 3 (P > 0.05), growth pattern is isometric. Population parameters were calculated for total fish as below, L?: 26 (cm); K: 0.7(year-1); t0: -0.65 and ?’: 2.82 respectively. Based on result, this species is classified as mediate vulnerable group fishes.