Growth Performance of Longfin Pompano on Extruded Feed in Coastal Cages at Hainan, China
Region: Northeast Asia
Longfin pompano (Trachinotus blochii) growth performance in coastal cages was evaluated from fingerling to sub-market size using the ASA LVHD cage production model and ASA extruded, marine fish feeds. The cage trial was conducted at Ling Shui, Hainan, China. Pompano were stocked in three, 8.0-m3 cages at a density of 2,000 fish per cage (250 fish/m3). Pompano were fed to satiation daily with a 47% crude protein and 15% crude fat feed (47/15) to fish size 25 g, and with a 43% crude protein and 12% crude fat feed (43/12) from fish size >25 g. Both feeds were fed in extruded, floating pellet form. Fish in all trial cages were fed to satiation, three times daily for the first month, and twice daily thereafter. Pompano grew from 5 g to 208 g in 144 days of feeding. Average FCR with the combination of 47/15 and 43/12 feeds was 1.92:1. Average fish survival was 65.8%. Net economic return and return on investment were RMB 3,754/cage (RMB 469/m3) and 62%, respectively, at a fish market price of RMB 36/kg. Results of the trial indicate that longfin pompano perform well on extruded feed and yield high economic gain. Feed cost with the ASA extruded feeds was RMB 10.4 per kilogram of fish growth. While longfin pompano exhibited a better FCR than ovate (goldenfin) pompano cultured in 2001, the trial cooperator felt overall growth performance and survival of longfin pompano was not as good as with ovate pompano.