Effect of Artificial Feed and Algae on Growth Rate of Thorny Oyster (Spondylus varians)
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Abstract
Spondylus varians or rock scallop or thorny oyster was native bivalve in Thailand and was used in many ways such as food in many countries but had never been raised before. It must be taken from the wild and more catches every year, especially in the eastern part of Thailand. Because it had the potential to develop into an economic mollusk in Thailand so this study was conducted on the possibility of raising Spondylus varians by using 3 different levels of artificial feed as 3, 4.5 and 6 mg/l and 3 different species of algae as Chaetoceros sp., Tetraselmis sp. and Thalassiosira sp. under experimental conditions in wet laboratory for 4 months. The experimental design was 3 x 3 factorial in CRD. It was found that all groups had no significant difference in length and height (P > 0.05) after 4 months and had no significant difference in length and height when compared with the beginning of the experiment. In cases of survival rate, there were no statistically significant differences. Survival rates ranged from 83.3 to 100 percent, indicating that Spondylus varians could be raising under indoor condition.
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