Interannual variability in the biochemical composition of newly hatched larvae of the spider crab Maja brachydactyla (Decapoda,Majidae) |
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| Authors: | Guiomar Rotllant Carles G Simeó Guillermo Guerao Marta Sastre Daniel F R Cleary Ricardo Calado Alicia Estévez |
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| Institution: | 1. Institut de Ciències del Mar, CSIC, , Barcelona, Spain;2. IRTA, , Sant Carles de la Ràpita, Spain;3. Centre de Desenvolupament Tecnològic de Sistemes d'Aquisició Remota i Tractament de la Informació (SARTI), Universitat Politècnica de Catalunya (UPC), , Vilanova i la Geltrú, Spain;4. Departamento de Biologia & CESAM, Universidade de Aveiro, , Aveiro, Portugal |
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| Abstract: | The spider crab Maja brachydactyla is an important commercial species in Europe and supports intensive fisheries in the NE Atlantic. A field survey was performed to assess long‐term and consecutive interannual (2005–2010) variation of the biochemical composition of newly hatched larvae of M. brachydactyla. Larval biochemical profiles differed significantly among years, with pronounced differences being recorded in 2010. Differences among batches of newly hatched larvae were mainly explained by the contribution of triacylglycerols and, to a lesser degree, by protein and lipid content. The use of different nutrition indices is discussed. The biochemical composition of newly hatched larvae from M. brachydactyla was highly variable, even though surveyed broodstock was obtained from the same local population and was always sampled during the same season. The unpredictable biochemical profiles of newly hatched larvae may condition their survival and recruitment. This largely overlooked aspect of larval variability should be considered in future fisheries management strategies and captive production of marine organisms that still rely on wild seeds. |
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| Keywords: | Biochemical composition energy content larval variability nutritional condition indices 6‐year period wild broodstock |
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