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Annual variation in the biochemical composition of newly hatched larvae of Maja brachydactyla in captivity

Andrés, Mireia, Estévez, Alicia, Simeó, Carles G., Rotllant, Guiomar
Aquaculture 2010 v.310 no.1-2 pp. 99-105
nutrient content, crabs, fatty acid composition, seasonal variation, proximate composition, feed rations, dry matter content, iron, hatching, omega-3 fatty acids, mineral content, phospholipids, histidine, lysine, copper, nutrient deficiencies, carbohydrate composition, crab culture, amino acid composition, animal feeding, larvae, vitamin A, ascorbic acid, lipid content, valine, Majidae, vitamin E, essential amino acids, spawning, nutritive value, captive animals
Quality of newly hatched larvae (NHL) of Maja brachydactyla in captivity has been characterized throughout the year to evaluate their availability for mass production. Spawning took place every month and NHL were collected and analyzed to estimate individual dry weight (DW) and proximate biochemical composition (protein, carbohydrate and lipids). Lipid class, fatty acid composition, amino acid profile, mineral and vitamins A, E and C contents were analyzed seasonally. NHL obtained throughout the year are a potential source for aquaculture purposes, since the increment in the relative protein and lipid (especially phospholipids and n-3 PUFA) content might compensate the decrease in DW of larvae hatched from broodstock kept during one year in captivity. However, the decrease in vitamins A and E as well as in certain essential amino acids (Lys, Val, and His) and trace elements (Cu and Fe) of NHL at the end of the year might be indicative of a nutritional deficiency in broodstock diets.