Possibility of using rotifer (Brachionus plicatilis) and water flea (Moina macrocopa) in replacement of brine shrimp nauplii for nursing of seabass
1997
Poonsin Parnichsuke (Department of Fisheries, Bangkok (Thailand). National Institute of Coastal Aquaculture)
Comparison on the nursing of 14-29 days old seabass (Lates calcarifer) larvae was carried out. The first treatment was fed with nauplius of brine shrimp (Artemia sp.) and the second treatment was fed with rotifer (Brachionus plicatilis) and water flea (Moina macrocopa). Calculation of feeding rate were formulated by Petchmanee (1983). Three replications were made for each treatment. The results showed survival rate of the larval seabass in the first treatment ranged from 84, 93 and 93.9 percent (an average 91.6 percent) while the second were 62.3, 65 and 68 percent (an average 65.1 percent). There were found that growth rate of fish, determination by their length and weight, in the first and second treatments were 0.77 cm, 0.56 g and 0.26 cm, 0.0072 g, respectively. Based on ANOVA analytical method, there were significantly difference (P0.05) of the survival rate and growth rate between the fish samples of these two treatments. The result on development of the fish to juvenile stage showed non-significantly difference (P0.05) between the first and the second treated fish (98.91 and 91.21 percent respectively). According to the results, there is possibility of using rotifer and water flea substitute for brine shrimp while there are lacking of brine shrimp. It is not only minimize the cost of investment but also promote the career of those who collect and reproduce water flea in many areas.
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