Impact of coastal pollution on biological, biochemical and nutritional status of edible oyster in Phoenix Bay Jetty and North Wandoor of Andaman.

摘要

Edible oyster, Crassostrea rivularis were collected from North Wandoor (NW) and Phoenix Bay Jetty (PJ) of Andaman and their biological, biochemical and nutritional status were assessed. Water quality parameters were estimated from both places and recorded higher levels of nitrite, nitrate and phosphate in PJ samples compared to NW. There was significant difference in length and weight of oysters collected from the 2 sites. Oysters from NW samples were bigger in size compared to PJ samples. All biochemical parameters showed reduction in the C. rivularis collected from PJ compared to NW. The extent of reduction in liver glycogen and ascorbic acid, acetyl choline esterase and alkaline phosphatase activities in gill tissue were 65, 42, 17.07 and 46.01% respectively. Overall results suggested that, oysters dwelling at PJ were not healthy and under stress due to continuous exposure to organic discharge which in turn might have caused lower growth rate of the oyster and depression in the biochemical and enzyme activities compared to NW oysters.