F.W. Tina, K.
Jaroensutasinee and P. Koad
Centre of Excellence for Ecoinformatics, School
of Science, Walailak University, Nakhon Si Thammarat-80161, Thailand
Author Email :
Aim: Studies on oyster
population dynamic is essential for effective oyster aquaculture.Bandon Bay
in Southern Thailand is a major shellfish aquaculture site of high commercial
value. The aim of this study was to evaluate the influence of environmental
factors on oyster diversity and their distribution in Bandon Bay.
Methodology: Adult oysters
were collected from eight aquaculture sites during low tide and their body
sizes were measured. Monthly, transparency, salinity, pH, dissolved oxygen,
biochemical oxygen demand, alkalinity, ammonium (NH4-N), nitrite,
nitrate and phosphate were recorded from Surat Thani Coastal Fisheries
Research and Development Centre, Department of Fisheries.
Results: Three oyster
species were observed: Crassostrea belcheri, Crassostrea lugubris
and Saccostrea forskalii, however, C. belcheri was most
abundant at most locations. Oyster density in Bandon Bay was mostly
influenced by alkalinity, followed by salinity, pH, NO3 and NH4-N.
Interpretation: Since oyster
reproduction, survival and shell development depend on environmental factors,
thus studies on relationships between environmental factors and oyster
occurrence/density may provide a better understanding about the community
structures and spatial dynamics of oysters, as well as how oysters respond to
Key words: Bandon Bay, Crassostrea belcheri, Crassostrea lugubris,
oyster, Saccostrea forskalii, Water quality