بررسي فراواني شانه داران و تاثير فاكتورهاي فيزيكي و شيميايي آب روي تراكم آنها در خوردورق و غزاله

A survey on the ctenophore abundance and effect of physical and chemical factors of water on their abundance in Doragh and Ghazaleh estuaries

The abundance of ctenophora in Doragh and Ghazaleh estuaries in the Khozestan province were studied from July 2005 to June 2006. Temperature, salinity, turbidity, BOD5, NO3, NO2, P04, hardness and pH were investigated. Pleurobrachia sp. was the only observed genus in this study. The highest mean frequency of ctenophora were obtained in July in Doragh estuary and the lowest mean frequency were obtained in Febunary in Ghazaleh estuary. According to the result, Salinty (P<0/05) and temperature (P<0/05) had a decreasing effect on the frequency of Pleurobrachia sp. In Doragh and Ghazaleh temperature had a decreasing effect on the frequency of Pleurobrachia sp. in Doragh and Ghazaleh estuary