Production of Red Sea Bream in 6.4-m3 Cages In Coastal Waters in Quanzhou, China
Region: Northeast AsiaDownload
A feeding trial was conducted in Quanzhou, Fujian Province, China to demonstrate growth performance of red sea bream from sub-market to market size in near-shore coastal cages with a high soybean meal inclusion feed. Sea bream were stocked in three, 6.4-m3 cages at a density of 1,000 fish per cage. Sea bream were fed a 43% crude protein, 12% crude lipid diet formulated with soybean meal at a 32% inclusion rate as partial substitution for fish meal. Sea bream grew from 257 g to an average weight of 930 g per fish in 118 days of feeding. Gross production averaged 98.2 kg/m3 (628 kg per cage) in the three trial cages. The average survival rate for fish in the three cages was 67.6%. Average FCR was 3.4:1. Average net economic return was RMB 1,839 ($222) per cage, yielding a 14% return on investment. Sea bream growth was rapid on the high soy-inclusion feed, with fish growing to nearly twice the 500-g target size in 118 days of the 180-day production schedule. FCR, however, was significantly impacted by a chronic eye disease and by high fish mortality following fish handling during a net change on day 60 of the trial.