The effects of environmental factors on survival, growth and biochemical composition of transplanted oysters (Ostreaedulis Linnaeus, 1758) from Aegean Sea to southern Black Sea

This study examined survival, growth rate and biochemical composition of oysters (Ostrea edulis) when transplanted from Aegean Sea to southern Black Sea (Sinop) and maintained offshore in a submerged long-line from December 2008 to December 2009. In December 2009, the mean length and live weight were 92.52 +/- 1.40mm and 109.60 +/- 2.41g respectively. Mean specific growth rate (SGR) was found as 1.29 +/- 0.16%. Meat yield ranged from 7.90 to 11.47%. Mean moisture and ash were 81.40 +/- 0.52% and 9.50 +/- 0.55% respectively. Protein content was between 36.57% and 61.31% with a mean of 50.17 +/- 2.13%, while lipid content was between 4.83% and 10.86% with a mean of 7.74 +/- 0.49%. Carbohydrate content was between 20.88% and 46.89% with a mean of 32.59 +/- 2.38%. The study demonstrated that protein, lipid and carbohydrate were used for different metabolic needs of oysters. Mortality was dependent on physiological stress related to the gonadal activity, temperature and inorganic matter in seawater. Consequently, the low salinity rate has a negative impact on growth rate of oyster. However, there was not a serious adaptation problem in transplanted oysters from Aegean Sea to Black Sea.