Evaluation of seven algal diets for spat of the Pacific scallop Argopecten ventricosus

M.C. Lora-Vilchis, N. Doktor-2001

Journal of the World Aquaculture Society, 32(2): 228-235  (from Current Contents)

Abstract :

The nutritive value of Isochrysis galbana (Tahitian), Chaetoceros calcitrans, Chaetoceros muelleri, and their bi- and trialgal combinations for Pacific scallop Argopecten ventricosus spat culture was studied. Ingestion rate, growth, survival, and biochemical composition were the variables evaluated. Growth results showed C. calcitrans and I. galbana + C. calcitrans diets have the best nutritive values. Poorest results were obtained with I. galbana diet. The acceptability and a high lipid content of C. calcitrans could explain the good results of C. calcitrans and I. galbana + C. calcitrans diets along with a better balanced diet effect in the bialgal mixture. The low growth of the scallops using the C. calcitrans + C. muelleri diet, despite the high ingestion rate, is explained by a low energy content and an unbalanced nutrient supply. The gross biochemical composition of the diets did not show a clear relationship to spat gross biochemical composition.

(Ctr Invest Biol Noroeste, Lab Ecofisiol, Aparado Postal 128, La Paz 23000, BCS, Mexico)

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