ティラピア仔稚魚における摂餌可能なタマミジンコの選別

概要

論文の詳細を見る
Maximum prey-size preference of larval tilapia Oreochromis niloticus was evaluated by feeding the water flea, Moina macrocopa. A three-hour feeding experiment was conducted at 28°C with a random population of M. macrocopa offered to four different sizes of tilapia: 10.7, 15.3, 19.0 and 26.2 mg. After the feeding time, uneaten M. macrocopa was collected to determine the distribution of its body length. The ratio of the maximum prey body length to the tilapia mouth width was 95.2±1.8%. The body size of M. macrocopa ingested by tilapia fry (10.7 mg) largely coincided with those that passed through a 500 μm mesh. The results indicated that M. macrocopa neonate separated by a mesh screen could be used as a starter food for tilapia fry, and extrapolating from the data it appears that adult M. macrocopa can be fed to fish of 46.6 mg.
生態工学会の論文
2004-01-31