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Título

The role of lipids in the gonadal development of the clam Ruditapes decussatus (L.)

AutorDelgado, Marina; Pérez-Camacho, Alejandro CSIC; Labarta, Uxío CSIC ORCID; Fernández-Reiriz, María José CSIC ORCID
Palabras claveRuditapes decussatus
Lipid classes
Sexual differentiation
Gonadal development
Food availability
Fecha de publicación2004
EditorElsevier
CitaciónAquaculture 241(1-4): 395-411 (2004)
ResumenThe evolution of phospholipids, free fatty acids, triacylglycerols, sterols and sterol and wax esters was studied throughout the process of sexual maturation in Ruditapes decussatus. The clams were fed with three daily food rations of the microalga Isochrysis galbana: R1: 2.5%, R2: 5.0% and R3: 10.0% (percentages correspond to the organic weight of food supplied as a proportion of the live weight of clams). The content of total lipids in the soft tissue increased with sexual maturation. During this process, the females always accumulated a greater quantity of lipids than the males, with triacylglycerols, phospholipids and sterol and wax esters being the components, which mostly determined the sexual differentiation. The size of the differences between sexes was influenced by the quantity of food available. Phospholipids constituted the largest lipid fraction in R. decussatus, representing 57–83% of total lipids. The total quantity of phospholipids was significantly greater in females than in males, although the percentage with respect to total lipids was greater in the males, which showed a low proportion of triacylglycerols. The females always presented a greater total quantity of triacylglycerols than the males, and a greater percentage with respect to total lipids (between 9.98% and 18.8%, as a function of the food ration). The triacylglycerols were absent in the males throughout sexual maturation, when the food quantity was moderate (R1). When the food was more abundant (R2 and R3), the sexually mature males temporarily accumulated triacylglycerols (between 0% and 3.18% of total lipids), although they disappeared in the final phase of sexual maturation. The sterol and wax esters followed the same process as the triacylglycerols, although they were present in lesser proportion (between 4.07% and 6.46% of total lipids in females and between 0% and 5.75% in males), and also disappeared in the final phase of sexual maturation.
Descripción17 páginas, 1 figura, 9 tablas
Versión del editorhttp://dx.doi.org/10.1016/j.aquaculture.2004.07.018
URIhttp://hdl.handle.net/10261/55953
DOI10.1016/j.aquaculture.2004.07.018
ISSN0044-8486
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