ATTRACTION AND PALATABILITY ACTIVITIES IN JUVENILE ABALONE (HALIOTIS-FULGENS) - 9 INGREDIENTS USED IN ARTIFICIAL DIETS

Nine different ingredients (fish acid silage, neutralized fish acid si lage, neutralized abalone viscera silage, fish meal, corn meal, fresh and dried Macrocystis pyrifera, gelatin and soybean meal) were used to evaluate the attraction and palatability activity on juvenile of abal one (Haliotis fulgens). Groups of 45 organisms were randomly separated from a batch of 170 and distributed in three aquaria. Twelve-hour obs ervations were performed using a conduct sheet with assigned values. I n the first 4 h the attraction activity was evaluated, and at the 12th hour, the palatability was registered. With the data obtained, a stat istical analysis was performed, using a chi2-test from the observed fr equencies. From the 9 ingredients evaluated, three silages gave a sign ificant change in conduct. The pH was found to be an important factor for attraction and palatability and a logistic model was used to evalu ate a possible pH effect on the attraction activity. The silage made f rom abalone viscera generated a high attraction and palatability activ ity.