Acute toxicity of atrazine, endosulfan sulphate and chlorpyrifos to Vibrio fischeri, Thamnocephalus platyurus and Daphnia magna, relative to their concentrations in surface waters from the Alentejo region of Portugal |
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Authors: | Palma P Palma V L Fernandes R M Soares A M V M Barbosa I R |
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Institution: | (1) Departamento de Ciências do Ambiente, Escola Superior Agrária de Beja, Beja, 7800-295, Portugal;(2) Centro de Estudos Farmacêuticos, Faculdade de Farmácia, Universidade de Coimbra, Rua do Norte, Coimbra, 3000-295, Portugal;(3) CESAM & Departamento de Biologia da Universidade de Aveiro, Aveiro, 3810-193, Portugal |
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Abstract: | Ecotoxicological effects of the herbicide atrazine and the insecticides endosulfan sulphate and chlorpyrifos were evaluated
using a test battery comprising aquatic organisms from different trophic levels. According to the categories established in
the EU legislation, atrazine can be considered non-harmful for the species tested, while the insecticides can be considered
very toxic for the crustaceans. The results of acute toxicity tests showed that the sensitivity of organisms were as follows:
Thamnocephalus platyurus > Daphnia magna > Vibrio fischeri. Chlorpyrifos may act as a toxic compound in the aquatic environment of Guadiana River, as it may be detected in water at
levels that promote toxic effects. |
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Keywords: | Chlorpyrifos Endosulfan sulphate Atrazine Aquatic ecotoxicity bioassays |
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