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We conducted a preliminarily study on the effects of dietary guaiacol on growth performance of abalone,Haliotis discus hannai Ino.Seven semi-purified diets were formulated with graded levels of guaiacol (0,5,10,50,100,500,and 1 000 mg kg-1).Abalone (initial weight:0.29 ± 0.01 g;initial shell length:8.55 ± 0.27 mm) were fed with these diets in a re-circulated water system for 152 days.Guaiacol significantly improved the specific growth rate (SGR) (P<0.05);excessive dietary guaiacol (1 000 mg kg-1) led to significantly high mortality (P<0.05),and lipid content in the soft body increased significantly after dietary guaiacol (P<0.05).Activities of catalase and phenoloxidase (PO) in the viscera were significantly stimulated by dietary guaiacol (P<0.05).Broken-line analysis based on SGR indicated that the minimum dietary guaiacol for the optimal growth of juvenile abalone is 15.43 mg kg-1.
We conducted a preliminarily study on the effects of dietary guaiacol on growth performance of abalone, Haliotis discus hannai Ino. Sevent semi-purified diets were formulated with graded levels of guaiacol (0, 5, 10, 50, 100, 500, and 1 000 mg kg -1 (Initial weight: 0.29 ± 0.01 g; initial shell length: 8.55 ± 0.27 mm) were fed with these diets in a re-circulated water system for 152 days. Guaiacol significantly improved the specific growth rate (SGR) (P <0.05) .Activities of catalase and phenoloxidase (PO) were significantly increased (P <0.05); increased lipid content in the soft body increased significantly after dietary guaiacol ) in the viscera were significantly stimulated by dietary guaiacol (Broken-line analysis based on SGR indicated that the minimum dietary guaiacol for the optimal growth of juvenile abalone is 15.43 mg kg-1.