Chiwaprawat khong pla busai.
1980
Sand goby (Oxyeleotris marmoratus, Bleeker) is known as the largest fish in the group of gobies. There are five families in this species. The original of this species is in Indo-China and is also found in Hawaii. The price of this fish is quite high and is preferred by importing countries such as Hongkong, Singapore, Malaysia, and Japan. Sand goby is found in every part of Thailand. By feeding habit they are grouped with the carnivores. They can be cultured in ponds or in floating cages but are well known as a cage culture species. It can be stocked in cage culture with more fish per square meter than pond. The growth rate of sand goby raring in cages is higher than that in ponds. The sand goby culture can make a good profit for the fish farmers. The stocking size of sand goby is about 100 gram and it is reared in 2.5X5X1.5 m. cages. The stocking rate is 150 per sq. meter. Fish are fed on ground trash fish mixed with rice bran. The harvesting is performed periodically by marketable size selection. The first harvest starts after a six month growing period. The marketable size is 40-1,200 gram. One of the most critical problems of Sand goby culture is the high mortality of fish caused by diseases. The causes of sand goby disease are not yet known, however, slow flow condition of water current in dry season and a number of fish farmers in an area appear to be the most likely causes. The scarcity of fish fingerlings is another problem for sand goby culture since there is no commercial source of supply. The largest source for fingerlings are natural waters.
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