Toxicidade aguda do praguicida organofosforado diclorvos e da mistura com o piretróide deltametrina em Danio rerio e Hyphessobrycon bifasciatus

Autores

  • Daniela TREVIS Universidade Presbiteriana Mackenzie
  • Soraya Ferreira HABR Faculdade d e Medicina Veterinária e Zootecnia -  USP
  • Francis Mary VAROLI Instituto de Ciências da Saúde, Universidade Paulista -  UNIP
  • Maria Martha BERNARDI Universidade Presbiteriana Mackenzie / Faculdade d e Medicina Veterinária e Zootecnia -  USP / Instituto de Ciências da Saúde, Universidade Paulista -  UNIP http://orcid.org/0000-0002-6860-9416

Palavras-chave:

peixes, praguicida, ecotoxicologia, mistura de praguicidas, letalidade

Resumo

Praguicidas como o Diclorvos (DDVP) e a Deltametrina (DTM) são comumente usados na produção agrí­­cola. Para avaliar a toxicidade de formulações comerciais do DDVP e da mistura deste com a DDM, foram realizados testes de toxicidade aguda em peixes das espécies Danio rerio e Hyphessobrycon bifasciatus. Para a mistura foram utilizadas as maiores concentrações dos praguicidas testados que não provocaram letalidade. Os resultados obtidos mostraram que, nas concentrações empregadas, o praguicida DDVP promove o efeito "tudo ou nadaâ€Â. No caso da mistura verificou-se a ocorrência de 100% de letalidade em concentrações dos praguicidas que não produziram letalidade se administradas isoladamente. Desta forma evidenciou-se efeito sinérgico dos praguicidas, sugerindo que o emprego de misturas destes praguicidas pode representar um fator importante. Finalmente, o efeito da toxicidade apresentada pelas duas espécies foi similar, sugerindo que Hyphessobrycon bifasciatus pode ser útil no caso de avaliações ambientais das condições nacionais.

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Publicado

2018-11-07

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Nota cientí­­fica (Short Communication)

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