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Differential utilization of biochemical components during larval development of the spider crab Maja brachydactyla (Decapoda: Majidae)
Authors:Mireia Andrés  Alicia Estévez  Francisco Hontoria  Guiomar Rotllant
Affiliation:1. IRTA Sant Carles de la Ràpita, Ctra. Poble Nou Km, 5.5., 43540, Sant Carles de la Ràpita, Tarragona, Spain
2. Instituto de Acuicultura de Torre de la Sal (CSIC), 12595, Ribera de Cabanes, Castellón, Spain
Abstract:Changes in lipid class, fatty acid, fat-soluble vitamins, amino acid and minerals were studied during larval development of Maja brachydactyla Balss, 1922 in order to provide information of its ontogeny and evaluate possible dietary deficiencies and constraints. Four different batches were analyzed from hatching to metamorphosis using enriched Artemia as food. Cultured larvae were in a good nutritional condition as confirmed by the continuous lipid accumulation throughout ontogeny. A regulation of polyunsaturated fatty acids (PUFA) occurred during development in order to maintain adequate basal levels of ω-3 fatty acids (likely through a retro conversion of C20 and C22 into C18 PUFA). Variations in the tocopherol levels indicated its possible role in PUFA protection against oxidation. Essential amino acid balance during development was not correlated with the Artemia feeding regime, but rather reflected inherent variations of the own species ontogeny. Larval requirements in essential minerals were fully supplied by the enriched Artemia.
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