احتياجات اصبعيات سمك الغريبة الرملية Siganus rivulatus من البروتين الغذائي

Fingerlings of Siganus rivulatus are reared in concrete aquaria at the Higher Institute of Marine Research. The study is conducted to determine the protein requirements and the best diet needed for the best growth of these species. The fingerlings are caught from sea, transferred to the rearing aquaria and acclimatized to the experimental conditions. Then, they are divided into three groups; 92 fish each. The fingerlings are fed to satiation twice a day for 80 days on diets containing 40, 45 and 50% protein. The results reveal that the third group (50% protein) has given the best weight gain which is 11.43 g/fish and with a FC=1.43.These results are significantly different from those obtained fromthe first group (40% protein) where weight gain is 6.71 and FC= 2.49, and from the second group (45% protein) where weight gain is 5.21g and FC=3.29.