ECOLOGICAL EFFECTS OF PESTICIDES CONTAMINATION ON AMPHIBIAN TADPOLES (Ptychadena bibroni) OF THE NIGER DELTA OF NIGERIA

Autores

  • Lawrence Ezemonye
  • Isioma Ilechie

DOI:

https://doi.org/10.7213/reb.v28i64.22735

Palavras-chave:

Acute toxicity, Amphibian, Ptychadena bibroni, Pesticides, Niger Delta

Resumo

Ecological effects of pesticides contamination on amphibian larval stages were assessed using acute toxicity in the laboratory. The study compared the toxicity of two widely used pesticides, Atrazine (herbicide) and Basudin (insecticide) on the larval stages of dominant frogs Ptychadena bibroni of Niger Delta of Nigeria. The American society of Testing and Material (ASTM) recommended semi-static renewal bioassay was employed, and LC50 was measured at 96 hours. Mean estimated 96 hours LC50 values showed that Basudin (Lc50 -0.860 μg/l) was more toxic than Atrazine (LC50 230.62 μg/l). Derived LC50 values decreased with increased in exposure duration. Substantial mortality and incidences of abnormal avoidance response occurred more at higher concentrations. The high sensitivity of 14 days old test organism to both pesticides provides a rational for regulatory surveillance and monitoring of the waters of the Niger Delta ecological zone. The result obtained is an indication of early warning signs of possible depletion of the amphibian population from pesticides contamination in the Niger Delta ecological Zones of Nigeria.

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Publicado

2006-11-24

Como Citar

Ezemonye, L., & Ilechie, I. (2006). ECOLOGICAL EFFECTS OF PESTICIDES CONTAMINATION ON AMPHIBIAN TADPOLES (Ptychadena bibroni) OF THE NIGER DELTA OF NIGERIA. Estudos De Biologia, 28(64). https://doi.org/10.7213/reb.v28i64.22735

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