Physiological effects of temperature and a herbicide mixture on the soft-shell clam Mya arenaria (Mollusca, Bivalvia)
| Autor: | Dominique Lapointe, Michel Fournier, Patrice Couture, Luna Greco, Ettore Capri, Jocelyne Pellerin, Marco Fusi, Angela Sacchi, Séverine Louis, Florent Garnerot |
|---|---|
| Přispěvatelé: | Università cattolica del Sacro Cuore [Piacenza e Cremona] (Unicatt), Institut des Sciences de la MER de Rimouski (ISMER), Université du Québec à Rimouski (UQAR), Institut Armand Frappier (INRS-IAF), Institut National de la Recherche Scientifique [Québec] (INRS)-Réseau International des Instituts Pasteur (RIIP), Centre Eau Terre Environnement [Québec] (INRS - ETE), Institut National de la Recherche Scientifique [Québec] (INRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2011 |
| Předmět: |
Mecoprop
Male Health Toxicology and Mutagenesis Mya Fresh Water 010501 environmental sciences 01 natural sciences MESH: Dose-Response Relationship Drug Toxicology chemistry.chemical_compound Malondialdehyde Climate change MESH: Animals Food science MESH: Superoxide Dismutase 0303 health sciences MESH: Oxidative Stress biology Dicamba Temperature Catalase MESH: Temperature Gonadosomatic Index Drug Combinations MESH: Water Pollutants Chemical MESH: 2-Methyl-4-chlorophenoxyacetic Acid [SDV.TOX]Life Sciences [q-bio]/Toxicology MESH: Fresh Water Acetylcholinesterase Female 2 4-Dichlorophenoxyacetic Acid Soft-shell clam MESH: Mya MESH: Malondialdehyde 2-Methyl-4-chlorophenoxyacetic Acid Superoxide dismutase Electron Transport Complex IV 03 medical and health sciences MESH: Electron Transport Complex IV Settore AGR/13 - CHIMICA AGRARIA MESH: Catalase MESH: 2 4-Dichlorophenoxyacetic Acid Environmental Chemistry Animals Seawater 030304 developmental biology 0105 earth and related environmental sciences MESH: Dicamba MESH: Drug Combinations Dose-Response Relationship Drug Superoxide Dismutase MESH: Biological Markers MESH: Seawater Pesticide MESH: Acetylcholinesterase Bivalvia biology.organism_classification MESH: Male Sexual development Chlorophenoxy herbicides chemistry Oxidative stress biology.protein MESH: Female Biomarkers Water Pollutants Chemical |
| Zdroj: | Environmental Toxicology and Chemistry Environmental Toxicology and Chemistry, Wiley, 2011, 30 (1), pp.132-41. ⟨10.1002/etc.359⟩ |
| ISSN: | 0730-7268 1552-8618 |
| DOI: | 10.1002/etc.359⟩ |
| Popis: | The aim of the current study was to investigate effects of temperature and a mixture of herbicides on the physiological status of the bivalve Mya arenaria. Bivalves acclimated to two temperatures (7 and 18°C) were exposed for 28 d to 0.01 mg/L of a pesticide formulation containing dichlorophenoxyacetic acid (2,4-D), 2-(2-methyl-4-chlorophenoxy) propionic acid (mecoprop), and 3,6-dichloro-2-methoxybenzoic acid (dicamba). At days 7, 14, and 28, mortality, immune parameters (hemocyte number, phagocytic activity, and efficiency), biomarkers of oxidative stress (catalase [CAT] and superoxide dismutase [SOD] activities and malondialdehyde [MDA] content), the metabolic enzyme cytochrome C oxidase (CCO), a biomarker of pesticide exposure (acetylcholinesterase [AChE]), and the activity of an enzyme related to gametogenesis (aspartate transcarbamylase [ATCase]) were monitored in clam tissues. Gonadosomatic index (GSI), condition factor (CF), and sex were also assessed. In clams acclimated to 7°C, exposure to pesticide enhanced CCO activity and CF and decreased MDA content, hemocyte number, CAT, and SOD activities. In clams kept at 18°C, pesticide effects appeared minor compared with samples kept at 7°C. In bivalves acclimated to 18°C, CCO, SOD, and ATCase activity and MDA content were enhanced, and hemocyte number, CAT, and AchE activities and phagocytosis were suppressed. In samples exposed to pesticides, increased temperature enhanced MDA content and CCO and SOD activity and suppressed hemocyte number and CAT and AchE activity. A gradual sexual maturation was observed in both sexes through experimental time, but females had a higher sensitivity to temperature and pesticides compared to males. Increased temperature altered the ability of the sentinel species Mya arenaria to respond to pesticide exposures. Further work is needed to understand the impacts of increasing temperature on the whole St. Lawrence estuary ecosystem. Environ. Toxicol. Chem. 2011;30:132–141. © 2010 SETAC |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Plný text