Sanitization studies on imported marine food fish fingerlings
1987
Khin, P.K. | Chou, R. | Cheong, L. (Primary Production Dept. (Singapore). Marine Aquaculture Section)
Fish fingerlings, like grouper (Epinephelus tauvina) and seabass (Lates calcarifer), that are imported into the country for farming are subjected to stress from handling and transportation during shipment, and from adapting to a new environment after stocking. High mortalities result as a consequence. Trials showed that mortalities of 63-87% was recorded for imported grouper fingerlings 2 weeks after importation, and in farmers' consignments, 45-82%. For imported seabass fingerlings, mortalities were 30% and above in trials and 20-40% in farmers' consignments. Fish survival depends on the condition of the fish on arrival and their size. In the present study, various sanitization protocols were tested in an attempt to improve fish survival of the imported fingerlings. Comprehensive sanitization, which involved preshipment treatment with acriflavin, transhipment treatment with nitrofurazone and on-farm treatments with formalin a0988nd nitrofurazone, improved grouper fingerlings survival by 1.1-2.0 times, and 1.2 times for seabass. Other sanitization protocols involving single treatment, namely only preshipment, or transhipment, or on-farm, were not as effective. The improvement in fish survival would be significant to fish farmers purchasing large consignm
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