Infection by gymnophallid metacercariae enhances predation mortality of SW Atlantic stout razor clam Tagelus plebeius |
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| Authors: | Mariana Addino Betina J Lomovasky Florencia Cremonte Oscar Iribarne |
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| Institution: | 1. Museo Argentino de Ciencias Naturales “Bernardino Rivadavia” (MACN-CONICET), Angel Gallardo 470, Buenos Aires 1405DJR, Argentina;2. School of Ocean Sciences, College of Natural Sciences, Menai Bridge, Anglesey LL59 5AB, UK;3. Universidad Nacional de Mar del Plata, Facultad de Ciencias Exactas y Naturales, CONICET, Funes 3250, Mar del Plata B7602AYL, Argentina;4. Grupo de Investigación y Educación en Temas Ambientales (GrIETA), Mar del Plata 7600, Argentina;5. Instituto de Biología Marina y Pesquera “Almirante Storni”, Universidad Nacional del Comahue, CONICET, Güemes 1030, San Antonio Oeste R8520CXV, Río Negro, Argentina;1. Departamento de Biologia & CESAM, Universidade de Aveiro, 3810-193 Aveiro, Portugal;2. Université de Bordeaux, EPOC, UMR 5805 CNRS, 2, rue du Pr Jolyet, F-33120 Arcachon, France;1. Environmental Studies Center, Qatar University, P.O. Box 2713, Doha, Qatar;2. School of Natural and Built Environment, Queen''s University Belfast, Northern Ireland, UK;3. Centre for Applied Marine Sciences, Bangor University, Menai Bridge, Wales, UK;4. Department of Fisheries, Ministry of Municipality and Environment, Qatar;1. IMARES Wageningen UR—Institute for Marine Resources and Ecosystem studies, P.O. Box 77, 4400 AB Yerseke, The Netherlands;2. Department of Aquaculture and Fisheries, Wageningen University, P.O. Box 338, 6700 AH Wageningen, The Netherlands;3. MarinX Consultancy, Elkerzeeseweg 77, 4322 NA Scharendijke, The Netherlands;4. Royal Netherlands Institute for Sea Research (NIOZ-Yerseke), 4400 AC Yerseke, The Netherlands |
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| Abstract: | Parasite life cycles are frequently completed in different hosts, thus the parasites have its life cycle overlapped to natural trophic webs. The family Gymnophallidae (Class: Trematoda; Subclass: Digenea) includes digenetic parasites whose larval stages occur on bivalves and may affect bivalve predation by the final host of these parasites. In this work we evaluated: (a) if individuals of the razor clam Tagelus plebeius with higher parasite intensity suffer higher predation by the oystercatcher Haematopus palliatus and, (b) if there is any effect of parasite intensity on burrowing and escape behaviours of these razor clams which may enhance exposure to predators. Field experiments (oystercatcher exclusion vs. open access) showed that clams with higher parasite intensity support higher predation by oystercatchers, which suggests a higher consumption of more parasitized clams and thus, a more successful reproduction of parasites linked to the intensity of infection. However, clam burrowing and escape behaviours did not show differences related to different parasite intensity, suggesting that the commonly believed mechanisms are not responsible in this case. |
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