Survey and Assessment Species diversity of Cyprinus carpio, Rutilus frisii kutum and Rutilus rotilus in Golestan province since 2006-2009

This study conduct to evaluate the survey and assessment of beach seine fish predation by statistical analysis of fish cooperative and Golestan fisheries office data since 2006-2008. In two Miankaleh and Gomishan in the second half of the 20 October second decade every year till the end of April the following year for a period of 6 months through pre-coastal continues by cooperatives Fishing blades and supervision of experts blade to the fishing and fishermen are employed Results, showed significant difference in amount of osteochities fish density and species in three years of study and was decreased (p<0.05).Also, the osteochities fish density was Cyprinus.carpio> Rutilus.firisi kuttum> Rutilus.rutilus in two first years of survey. Followed the decreasing Carp predation In 2008 than two past years Kuttum predation was increasing than past brightly and predation density was kuttum> Sea carp> Roachin 2008. So, kuttum by 503525 kg had the upper level of predation in2008 and Roach by864 kg had the lower level in 2007.