population parameters and length-weight relationship of deep flounder (pseudorhombus elevatus ) in northwest of persian gulf (khuzestan coastal waters, iran)

during this study from december 2009 to november 2011, 363deep flounder fish were caught and their weight and length were measured. the caught fish included 18 males, 200 females and 155 immature fishes. the mean, maximum and minimum total lengths were 264 ± 57 (mean ± sd), 415 mm and 115 mm respectively. the mean, maximum, and minimum total weights for this species were 238 ± 150 g, 827 g and 14 g respectively. the calculated length-weight relationships were w=0.000007fl3.09 (n=200, r2= 0.96) for the female, w=0.00002fl2.90 (n=18, r2=0.94) for the male and w=0.000009fl3.04 (n=363, r2 =0.96) for total fish. with a verified calculated b as 3 student t-test showed no significant difference between calculated b and 3 (p>0.05), demonstrating that the growth pattern is isometric.  population parameters calculated for total fish were l∞= 42 (cm); k= 1 (year-1); t0= -0.14 and ф’= 3.24. based on the results, this species is classified as mediate vulnerable group fish.