Idenification and abundance of bivalvia in coasts of Boushehr Province (Deylam,Bushehr, Dayer and Kangan) in spring and summer

This study was done in order to idenification and survey of bivalvia diversity in coasts fromBushehr province (Persian Gulf), 2009.The sampling were collected four stationsfromDeylam, Bushehr, Dayer and Kangan (of mangrove’s coast) with three replicate in spring and summer seasons.Sampling was done by quadrate 625 cm2 and than samples were identified. Samples according to distribution at different depths were compared. For assessed diversity and dominance species of the bivalvia was used of two index like Shanon and Sympson.In fact were identified seven speices and three genus of bivalvia. The number of bivalve idenification in spring 2973±64.72and in summer 1584±51.31 samples in cm2 fromthe study area. The highest of bivalvia abundance were 2008±42.28, 1792±35, 521±11.25 and 236±7.12 samples in cm2 from Dayer, Deylam, Kangan and Bushehr (P<0.05). The number of identified bivalves were significantly different between the four stations (P<0.05). The highest of Shanon index was realized spring in Kangan with H=1.917 and the lowest their summer in Bushehr with H=0.517. The highest of Sympson index was summer in Bushehrwith λ=0.665 and the lowest their summer in Kangan with λ=0.201. InDeylam station was order to identification 3 species that the highest diversity Tellinawallaceae1341±38.95 samples in cm2. In Bushehrstation was order to identification 2 species that abundance in summer 80±3.96 samples in cm2 than more lower spring with 156±8.89 samples in cm2. In this study abundance of bivalvia lower with increasing of temperature in summer. In bivalvia have abundance in spring than more summer.In four stations Idenificated of Tellinawallaceae.