The relationship between Pseudo-nitzschia (Peragallo) and domoic acid in Scottish shellfish |
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| Institution: | 1. Guangzhou Key Laboratory of Subtropical Biodiversity and Biomonitoring, College of Life Science, South China Normal University, 55 of Zhongshan West Avenue, Guangzhou 510631, PR China;2. Guangdong Provincial key Laboratory of Healthy and Safe Aquaculture, College of Life Science, South China Normal University, 55 of Zhongshan West Avenue, Guangzhou 510631, PR China;3. Natural History Museum of Denmark, University of Copenhagen, Sølvgade 83S, Copenhagen, Denmark;4. Faculty of Resource Science and Technology, Universiti Malaysia Sarawak, Kota Samarahan 94300, Malaysia;5. Key Laboratory of Testing and Evaluation for Aquatic Product Safety and Quality, Ministry of Agriculture; Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao 266071, PR China;1. Centro para el Estudio de Sistemas Marinos (CESIMAR), CCT CENPAT, CONICET, Boulevard Brown 2915, U9120ACV Puerto Madryn, Chubut, Argentina;2. Universidad Nacional de la Patagonia, San Juan Bosco, Boulevard Brown 3150, U9120ACV Puerto Madryn, Chubut, Argentina;3. Facultad de Ciencias Naturales, Universidad Nacional de la Patagonia San Juan Bosco, Roca 115, 1er Piso, U9100AQC Trelew, Argentina;4. Alfred Wegener Institut-Helmholtz Zentrum für Polar- und Meeresforschung, Chemische Ökologie, Am Handelshafen 12, 27570 Bremerhaven, Germany;5. Instituto Argentino de Oceanografía (IADO), CONICET-Bahía Blanca, Camino La Carrindanga Km 7.5, B8000FWB Bahía Blanca, Argentina;6. Facultad Regional Bahía Blanca, Universidad Tecnológica Nacional, 11 de Abril 461, B8000LMI Bahía Blanca, Argentina;1. IFREMER, REM-EEP-LEP, BP 70, 29280 Plouzané, France;2. Station Biologique de Roscoff (Roscoff Marine Station)- Place Georges Teissier, 29680 Roscoff, France & Centre Ifremer de Brest - Pointe du Diable, 29280 Plouzané, France;3. IFREMER, Unité de Recherche Lagons, Ecosystèmes et Aquaculture Durable (LEAD-NC), BP 2059, Nouméa 98846, New Caledonia, France;4. IFREMER, LER/N, Avenue du Général de Gaulle, 14520 Port en Bessin, France;5. IFREMER, Dyneco/PELAGOS, BP 70, 29280 Plouzané, France;1. Normandie Univ, UNICAEN, CNRS, BOREA, 14000 Caen, France;2. UMR BOREA, CNRS-7208, IRD-207, MNHN, UPMC, UCBN, 14032 Caen, France;3. CMAbio-SF 4206 ICORE UNICAEN, 14032 Caen, France;4. Ifremer, LER/N, 14520 Port en Bessin, France;5. LABEO Frank Duncombe, Saint-Contest, 14053 Caen Cedex, France;1. Food Safety Group, Centre for Environment, Fisheries and Aquaculture Science, Barrack Road, Weymouth, Dorset DT4 8UB, UK;2. Scottish Association for Marine Science, Scottish Marine Institute, Oban, PA37 1QA, Scotland, UK;3. Aquatic Pathogens and Pests, Centre for Environment, Fisheries and Aquaculture Science, Barrack Road, Weymouth, Dorset DT4 8UB, UK;4. Phytoplankton Laboratory, Centre for Environment, Fisheries and Aquaculture Science, Pakefield Road, Lowestoft, Suffolk NR33 0HT, UK;1. Departamento de Bioquímica y Biología Molecular, Instituto de Acuicultura, Universidade de Santiago de Compostela, Santiago de Compostela, 15782, Spain;2. Centro de Investigacións Mariñas, Xunta de Galicia, Pedras de Corón s/n Apdo 13, Vilanova de Arousa, 36620, Spain;3. Sistemas Genómicos, Ronda G. Marconi 6, Paterna, Valencia, 46980, Spain |
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| Abstract: | The diatom genus Pseudo-nitzschia (Peragallo) associated with the production of domoic acid (DA), the toxin reposnsible for amnesic shellfish poisoning, is abundant in Scottish waters. A two year study examined the relationship between Pseudo-nitzschia cells in the water column and DA concentration in blue mussels (Mytilus edulis) at two sites, and king scallops (Pecten maximus) at one site. The rate of DA uptake and depuration differed greatly between the two species with M. edulis whole tissue accumulating and depurating 7 μg g?1 (now expressed as mg kg?1) per week. In contrast, it took 12 weeks for DA to depurate from P. maximus gonad tissue from a concentration of 68 μg g?1 (now mg kg?1) to <20 μg g?1 (now mg kg‐1). The DA depuration rate from P. maximus whole tissue was <5% per week during both years of the study. Correlations between the Pseudo-nitzschia cell densities and toxin concentrations were weak to moderate for M. edulis and weak for P. maximus. Seasonal diversity on a species level was observed within the Pseudo-nitzschia genus at both sites with more DA toxicity associated with summer/autumn Pseudo-nitzschia blooms when P. australis was observed in phytoplankton samples. This study reveals the marked difference in DA uptake and depuration in two shellfish species of commercial importance in Scotland. The use of these shellfish species to act as a proxy for DA in the environment still requires investigation. |
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| Keywords: | Domoic acid Scotland |
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