摘要：

Biomass estimation of fishes were done by depletion method in Shadegan Wetland in 2011-12. Fishing effortand landing catch amount per unit effort was done via random oversea in fixed landing area monthly. Fishermenand catch statistics were obtained from census. Total catch was calculated from multiplication of effort andaverage catch. Fishes biological characteristics survey indicated that Golden barb (Barbus luteus) and Berzem (Barbus pectoralis ) has maximum (62 kg/ha) and minimum (4 kg/ha) biomass respectively. Maximum andMinimum biomass was in spring (380 kg/ha) and in winter (58 kg/ha) respectively and mean biomass wasestimated 249 kg/ha in whole area during one year.Number of fishermen were about 1317 and maximum fishing effort was in April, May and June. Total fishlanding was 4300 tons per year in which 1119 tons was calculated in April.Large scaled barb ( Barbus grypus) and Abu mullet (liza abu) had maximum and minimum mean lengthand weight. The range length of most of fishes was low and their spawning season was in winter and spring.Length- weight relationship indicates their isometric growth.Despite of 45% decrease of number of fisherman to previous time (2008), catch effort and exploitation wasincreased (20%). Regarding fish living area (70000 ha), total biomass was 17430 tons.

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