仔稚魚用生物餌料蛋白質の栄養価〔種苗生産における初期生物餌料の栄養価に関する研究-2-〕

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The nutritional quality of living organisms as protein sources was investigated by determining their amino acid composition, digestibility, protein efficiency ratio (PER), and net protein utilization (NPU). There were no marked differences in amino acid compositions of various kinds of living feeds, except for a low threonine content in Artemia. The digestibility of the protein of Brachionus was as high as 89-94%, regardless of their culture media (such as baker's yeast and freshwater or marine Chlorella), the digestibility of Artemia was slightly lower than Brachionus in both carp (83%) and rainbow trout (89%). The values for PER and NPU of living feeds determined with carp and rainbow trout were also high. The values for NPU of Brachionus, Artemia, Tigriopus, Moina, and Daphnia were 70-80% of those obtained with casein, indicating that these living organisms have a superior food value as protein sources for fish. The gross energy of the living feeds was proportional to the lipid content of the living organisms: high in Brachionus cultured with marine Chlorella and low in Acartia.
日本水産學會の論文