Seasonal variations in lipid composition of the hydrothermal vent mussel Bathymodiolus azoricus from the Menez Gwen vent field |
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| Authors: | Ana Colaço Catarina Prieto Ana Martins Miguel Figueiredo Virginie Lafon Margarida Monteiro Narcisa M Bandarra |
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| Institution: | 1. IMAR - Centro da Universidade dos Açores, Department of Oceanography and Fisheries, Cais de Sta. Cruz, 9001-382 Horta, Azores, Portugal;2. INRB/IPIMAR Nutrition Laboratory, Av. Brasília, 1449-006 Lisbon, Portugal;1. Department of Medicine, Hospital de Santa Maria, Centro Hospitalar Lisboa Norte, Lisbon, Portugal;2. Department of Pathology, Hospital de Santa Maria, Centro Hospitalar Lisboa Norte, Lisbon, Portugal;3. Department of Surgery, Hospital de Santa Maria, Centro Hospitalar Lisboa Norte, Lisbon, Portugal;4. Laboratory of Clinical Pharmacology and Therapeutics, Faculty of Medicine, University of Lisbon, Lisbon, Portugal;5. Clinical Pharmacology Unit, Instituto de Medicina Molecular, Lisbon, Portugal;1. Centro Hospitalar Tâmega e Sousa, Penafiel, Portugal;2. Centro Hospitalar S. João, Porto, Portugal;1. Centro de Investigaciones Costeras– Universidad de Atacama (CIC–UDA), Avenida Copayapu 485, Copiapó, Región Atacama, Chile;2. Departamento de Química–Física, Universidad de Cádiz, CP 11510, Puerto Real, Cádiz, Spain;3. Department of Earth Sciences, University of Huelva, Campus ‘El Carmen’, Huelva, E-21071, Spain;4. Department of Mining Egineering, University of Chile, FCFM, Santiago, Chile;1. Department of Anesthesiology, Intensive Care, and Emergency, Centro Hospitalar do Porto, Porto, Portugal;2. Department of Liver Transplantation, Centro Hospitalar do Porto, Porto, Portugal;1. Radiation Oncology Department, Instituto Português de Oncologia Francisco Gentil do Porto, E.P.E., Porto, Portugal;2. Radiobiology Lab, Instituto Português de Oncologia Francisco Gentil do Porto, E.P.E., Porto, Portugal;3. Oncology Department, Instituto Português de Oncologia Francisco Gentil do Porto, E.P.E., Porto, Portugal |
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| Abstract: | Specimens of the hydrothermal mussel Bathymodiolus azoricus collected in Menez Gwen hydrothermal vent field (NE Atlantic) during 2002–2003 were examined for feeding patterns variations through three seasons. The fatty acid profile and lipid classes of the mussels were studied, together with the MODIS/AQUA-derived near-surface chlorophyll a to test the hypothesis that surface productivity might be related to the feeding patterns of this species. The lipid levels showed pronounced seasonal fluctuations with the highest values occurring in January and August. Seasonal variations in lipid classes and fatty acid composition of neutral and polar lipids in the mussels are presented. Differences in the fatty acid profile of lipid classes in different seasons suggest that the higher energy requirements in summer and winter were supplied by bacterial biomarkers ω7 MUFA (monounsaturated fatty acids), whereas ω6 PUFA (polyunsaturated fatty acids) and NMI (non-methylene-interrupted) fatty acids predominated during the spring. The MODIS/AQUA data show marked seasonal variability and an anomalous peak during January of 2003, although this cannot be directly linked to lipid composition variation. |
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