Commercial Feed and Algae for Feeding Pinna bicolor in Indoor Tanks
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Abstract
The research determined the growth rate and survival rate of Pinna bicolor fed with commercial feed mixed with algae in three different proportions under the indoor condition. Pinna bicolor with the size more than 13 cm. length were caught from the natural in Chonburi province and were acclimatized in the concrete pond for 10 days. 30-33 ppt. of seawater was used in the experiment. After acclimatization, P. bicolor were divided into 3 treatments with 3 replications. Treatment 1 was fed with 0.5 g. of commercial feed and 1 liter of mixed Isochrysis sp. + Tetraselmis sp. in 25-liter indoor tank. Treatment 2 was fed with 1.0 g. of commercial feed and 1 liter of mixed Isochrysis sp. + Tetraselmis sp. Treatment 3 was fed with 1.5 g. of commercial feed and 1 liter of mixed Isochrysis sp. + Tetraselmis sp. All three groups of were fed with the same microalgal species at the same density and the same kind of commercial feed. All treatments were fed once a day for 3 months. Water was changed every day at least 1 liter and sediment was removed. Length, width, weight and survival rate of P. bicolor were recorded every month. At the end of the experiment, it was found that all treatments had survival rates of 100% and growth rates showed no difference in length and width. Only weight had little higher than the initial weight but showed no statistical difference. This experiment revealed that P. bicolor could be cultured under the indoor condition.
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