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  Global Journal of Environmental Science and Technology 2011, 1: 12
  Research Article
 
Embryo-toxic effects of atrazine environmental concentrations on the crustacean Daphnia magna
  P. Palmaa,b, I.R. Barbosab  
     
a Departamento de Ciências e Tecnologias Aplicadas; Escola Superior Agrária de Beja, Beja 7800-295, Portugal
b Centro de Estudos Farmacêuticos, Faculdade de Farmácia, Universidade de Coimbra, Pólo das Ciências da Saúde, Azinhaga de Santa Comba, 3000-548 Coimbra, Portugal

   
  Abstract  
  Atrazine is one of the most used pesticides all over the world and it is frequently detected in surface water. The aim of this study was to evaluate the effects promoted by environmental concentrations of atrazine on the embryo development of Daphnia magna. All the concentrations induced a percentage of embryo abnormalities upper than 78%. The profile of embryo abnormalities included effects in both stages of embryo development (gastrulation and organogenesis). At the lowest concentration (1 µg L-1) we noted the appearance of 20% of arrested eggs. This effect increased with the concentrations, which indicate the increment of the effects severity. Therefore, the maximum allowable concentration proposed for atrazine by the environmental quality standards (2 µg L-1) induce high toxic effects to the exposure embryos.
     
  Keywords  
  Daphnia magna; Atrazine; Embryo development  
     
   
   
   
   
     

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