Effects of sublethal concentrations of copper and freshwater on behaviour in an estuarine gastropod Polinices sordidus |
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| Institution: | 1. Centro de Cultivos Mariños, Consellería do Mar, Xunta de Galicia, Ribadeo (Lugo), Spain;2. Novostrea Bretagne, Route du Vieux Passage, Banastère, 56370 Sarzeau, France;3. CIIMAR Interdisciplinary Centre of Marine and Environmental Research, Laboratory of Ecotoxicology and Ecology, University of Porto, Rua dos Bragas, 289, 4050-123 Porto, Portugal;4. Grupo de Reciclado e Valorización de Residuos (REVAL), Instituto de Investigacións Mariñas (IIM-CSIC), C/Eduardo Cabello, 6, CP 36208 Vigo, Spain;1. Coastal & Marine Ecosystems Group, Marine Ecology Laboratories (A11), School of Life & Environmental Sciences, The University of Sydney, NSW 2006, Australia;2. Plant Functional Biology and Climate Change Cluster, University of Technology Sydney, PO Box 123, Broadway, NSW 2007, Australia;3. Australian Centre for Field Robotics, Dept. of Aerospace, Mechanical & Mechatronic Engineering, The University of Sydney, NSW 2006, Australia;4. Integrative Ecology Group, Heydon-Laurence Building (A08), School of Life & Environmental Sciences, The University of Sydney NSW 2006, Australia |
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| Abstract: | This study investigated the effects of contamination by copper and freshwater on the behaviour of the estuarine gastropod Polinices sordidus. The burying response was inhibited by both pollutants. In the case of copper, it was suggested that this response after 30 min could reflect toxicity after 96 h, i.e. the 96 h LC50 and the 30 min ED50 were very similar. P. sordidus responded to freshwater at concentrations well below the 96 h LC50, suggesting that this species can detect sublethal concentrations of freshwater. Thus, for salinity, the 30 min ED50 is not a reliable indicator of the 96 h LC50. A linear decline in crawling activity was found in the presence of increasing concentrations of both pollutants. These results for both aspects of behaviour are discussed in the light of results reported earlier for a marine species Polinices incei. |
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