Authors : Ana Nallely Ceron Ortiz , Beatriz Cordero , Bertha O. Arredondo-Vega and Miguel Robles
Abstract: The culture of the scallop Lyropecten (Nodipecten) subnodosus could be a profitable economic activity, but the knowledges about its nutritional requirements are not enough. This study evaluated the effect of the nutritional quality of three microalgae mixtures diets on the growth of L. (N.) subnodosus during seven weeks (M1: Isochrysis sp. - Pavlova lutheri; M2: Pavlova lutheri - Chaetoceros calcitrans and M3: Chaetoceros calcitrans - Isochrysis sp.). The spat were fed with three microalgae mixtures diets and they were kept at 21 ± 1 oC. The best filtration rates was obtained with an initial algae concentration of 200,000 cell mL-1, at which near total food utilization was achieved; at higher concentrations the spat produced pseudofeces and unconsumed food remained in the vessels after 24 hours. The major increases in growth (73.4 % in length and 57.83 mg of wet weight) were obtained in the spat fed with the diet M2 (P. lutheri and C. calcitrans), in this diet the high protein content (52.17 %) and quantity of the essential fatty acid 20:4n6, 20:5n3 and 22:6n3 were in an appropriate proportion.
Ana Nallely Ceron Ortiz , Beatriz Cordero , Bertha O. Arredondo-Vega and Miguel Robles , 2006. Growth of Lyropecten (Nodipecten) subnodosus (Sowerby, 1835) spat fed with three microalgae mixtures diets. Journal of Fisheries International, 1: 1-7.