Suitability of australian formulated diets for aquaculture of the tropical abalone Haliotis asinina Linnaeus

摘要

The performance of Haliotis asinina Linnaeus fed four commercially available diets formulated for temperate Australian species was assessed relative to a natural diet of Gracilaria edulis. Parameters measured included growth in terms of total wet body weight (TWBW) and shell length (SL), survival, food conversion ratio (FCR), condition index (CI), and sexual maturation. The results of these measurements indicated that two of the formulated diets could be used for commercial culture of H. asinina. Nutritional and physical parameters of these diets were used in a multivariate regression analysis to identify variables that explained the most variation in growth between diets. Parameters that were selected by this analysis were the ratio of crude protein (CP) to gross energy (GE) and the rate that protein leached from the formulated diets. The resulting regression equation was highly significant in its explanation of the variation in growth (P = 2.2 X 10~(-6)). To determine the quality of the dietaryCP in each diet, the essential amino acid profile of each diet was compared to that of whole soft body tissue in H. asinina. Methionine seemed to be deficient in all of the diets. Animals fed G. edulis did not seem to suffer from a lack of n-3 PUFAs.