Protein Level and Protein Energy Ratio that Produce the Best Gonad Quality of Sea Urchin Tripneustes Gratilla

The study aims to determine protein leveland protein energy ratio that producethe best gonad quality of sea urchin Tripneuestes gratilla. Sea urchin were fed nine test diets with the combination ratio of protein level (%) and protein energy(kcalGE/g) namely; A (22:9), B (22:11), C (22:13), D (27:9), E (27:11), F (27:13), G (32:9), H (32:11), and I (32 : 13). Treatment G produced the best gonad quality with gonad weight, gonad protein and gonad colour of 3.49 g, 64.45 % and pale yellow until orange, respectively. Treatment G also showed carotenoid total ranged from 15 ppm to 18 ppm and beta -carotene ranged from 5 ppm to 6 ppm. Moreover, this treatment exhibited gonad weight and gonad protein resulting in significantly difference (P0.05).