Effects of different Astaxanthin in diets on growth and survival of lobsters (Panulirus ornatus) in puerulus stage to <1,5g

Abstract

A 6-week feeding trial was conducted with juvenile (0.027g ÷ 0.029g) white puerulus, Panulirus ornatus, to evaluate the needs for astaxanthin supplements in the diets for lobsters reared in an outdoor system in the presence of hand made foods. The basal diet was formulated with crude protein levels of 55÷60% and three levels of supplemented astaxanthin (60mg.kg^-1, 70mg.kg^-1, 80mg.kg^-1). The results of the study showed that the survival in all experiments are higher than 73%. The average growth (of about CL length and weight) after six-week feeding was found with 80mg.kg^-1 (1.19 ± 0.024)(g); in the experiment 60mg.kg^-1 (1.07± 0.031)(g); meanwhile the highest growth found in the experiment 70mg.kg^-1 (1.21 ± 0.021)(g). One-way ANOVA showed a no significant difference (P ≥ 0.05) among lobsters fed diets containing the various levels of astaxanthin

Key words: panulirus ornatus; puerulus; hand made foods.