Nutritional value of microalgae-based diets for lions-paw scallop (Nodipecten subnodosus) juveniles reared at different temperatures

作者：Saucedo Pedro E^*; Gonzalez Jimenez Azucena; Acosta Salmon Hector; Mazon Suastegui Jose M; Ronson Paulin Jose A

来源：Aquaculture, 2013, 392: 113-119.

DOI：10.1016/j.aquaculture.2013.02.001

• Biochemical composition
• Growth
• Microalgal diets
• Respiratory rate
• Temperature

We studied the nutritional value of mono, binary, and ternary algal diets for the juvenile lions-paw scallop Nodipecten subnodosus reared at four temperatures: 16, 20, 24, and 28 degrees C. Live diets included one monoalgal (Isochrysis galbana), three binary (I. galbana + Pavlova salina, I. galbana + Chaetoceros muelleri, and P. salina + C. muelleri) and one ternary (I. galbana + P. salina + C. muelleri) mixtures of microalgae. Scallop responses were measured as survival, growth in shell height and wet and dry weight, and respiratory rate. Scallops grew significantly larger (6.81 mm; 39.75 g) and faster (0.13 mm d(-1); 1.11 gd(-1)) and had higher respiratory rates (1326 mg O(2)min(-1)mg(-1) dry weight of meat) when fed P. salina + C. muelleri and kept at 28 degrees C and 24 degrees C. In contrast, scallops grew significantly less (2.72 mm; 5.54 g) and slower (0.01 mm d(-1); 0.05 gd(-1)), and had a lower respiratory rate (670 mg O(2)min(-1)mg(-1) dry weight of meat) with a diet exclusively of I. galbana at 16 degrees C. Growth rates were significantly related to nutritional indices that include protein content. These results indicate the importance of this nutrient in juvenile growth, which is useful for optimizing culturing programs for this commercially important bivalve.

• 出版日期2013-5-10