Spatial variation of symbiotic dinoflagellates (Zooxanthellae) on dominant reef-building coral

Density, mitotic index and cell size of Symbiotic dinoflagellates of reef building coral "Porites compressa" of Larak Island, Khark Island and Nay band Bay was studied. Corals of Larak Island that are near to strait of Hormoz have exposed to high nutrients from Oman Sea. Corals of Nayband Bay are always exposed to high environmental stress because of developement in oil and gas activities for about 15 years. Corals of Khark Island located in western north Persian Gulf are exposed to organic matter, oil activities and fresh waters. According to ANOVA analysis, the density and cell size of zooxanthellae in corals of Larak Island is higher than from other locations, and also showed significantly different to Khark Island. In addition, there have not seen significant difference among all of factors between Larak Island and Nay band Bay and between Khark Island and Nay band Bay.