Authors : Ana Nallely Cer�n-Ortiz , Beatriz Cordero , Cecilia Flores-Vergara and Patricia Ascencio-Padilla
Abstract: The effect of the density and nutritional quality of the diet on the growth and survival of the organism had been evaluated in different species of Mollusk. In bivalve low growth and survival had been registered in high densities of culture and poorer nutritional quality of the diet. The scallop Lyropecten (Nodipecten) subnodosus is an organism with a high commercial value. However, in this species few researches had been performed to evaluate the effect of the density and nutritional quality of the diet on the growth and survival, principally in stages of larvae and spat. The objective in this study was to evaluate the effect of the survival and nutritional quality of the diet on the growth and survival of L. (N.) subnodosus spat. In this study, the results of growth and survival obtained to show significant differences between densities and nutritional quality of the diet. The major results of length, total dry weight, organic content and survival were obtained in the organism cultured in the lowest density and fed with the mixture diet M1 (Pavlova lutheri and Chaetoceros calcitrans). The mixture diet M1 registered the higher content of protein, carbohydrates and polyunsaturated fatty acids. These components had been essential to the growth and survival of the spat stage, due to its high requirements of protein and fatty acids used for the somatic growth. For this reason the high growth and survival were registered in the organism cultured in the lowest density and fed with high protein content and adequate percentages of the polyunsaturated fatty acids (M1).
Ana Nallely Cer�n-Ortiz , Beatriz Cordero , Cecilia Flores-Vergara and Patricia Ascencio-Padilla , 2006. EFFECT OF DENSITY AND NUTRITIONAL QUALITY OF DIET ON SURVIVAL AND GROWTH OF LION�S-PAW Lyropecten (Nodipecten) subnodosus SPAT.. Journal of Fisheries International, 1: 33-39.