FISHERIES RESEARCH INSTITUTE,MOA,TAIWAN

In order to understand the growth condition of the long-finned grouper (Epinephelus quoyanus) in differed environments, the study was conducted and three experiments: rearing in indoor concrete ponds, in outdoor concrete ponds and in muddy ponds for 33, 88 and 70 days, respectively. The specific growth rate (SGR), feed efficiency ratio (FER), condition factor (K) and coefficient of variation (CV) were evaluated. The SGR of the fish reared in the indoor concrete ponds was 0.472﹪, while FER=21.87﹪ and K=13.53. Fish reared in the outdoor concrete ponds had the SGR decreased from 0.510﹪ to 0.314﹪ and the FER from 21.30% to 17.12% during the course of 88 days experiment. Condition factor showed no significant variation. Average SGR of the fish reared in muddy ponds was 0.839﹪. Three results indicate that the SGR and the FER of the long-finned grouper are less than those of other 8 spieces of seawater fishes in culture.