Toxic Effect of Fenamiphos on the Earthworm, Eisenia fetida Annelida: Oligochaeta ​

Year 2016, Volume: 44 Issue: 2, 133 - 137, 01.06.2016

Esra Akat Sezgi Arman

Abstract

The aim of the present study was to investigate for the first time adverse effect of fenamiphos on the eart- hworm, Eisenia fetida. Earthworms were exposed to different concentrations of fenamiphos 5, 10 and 20 mg/kg . After 96 h, earthworms were euthanized and fixed. Histological alterations in earthworm’s body wall epidermis, circular and longitudinal muscles , chloragogenous tissue and intestinal epithelium were asses- sed. Histopathological changes were more prominent in medium 10 mg/kg and high-concentration 20 mg/ kg groups than in the low-concentration 5 mg/kg group. Degeneration in the intestine and integumentary system, as our results indicated after exposure to fenamiphos, are likely to interfere with the correct functio- ning of the intestine and integumentary system may affect earthworm survival.

Keywords

Fenamiphos, toprak solucanı, bağırsak, vücut duvarı

Fenamiphos’un Eisenia fetida Annelida, Oligochaeta Üzerine Toksik Etkileri

Abstract

S unulan bu çalışma, fenamiphosun toprak solucanı Eisenia fetida üzerine olumsuz etkilerini inceleyen ilk çalışmadır. Toprak solucanları fenamiphosun farklı derişimlerine 5, 10 ve 20 mg/kg maruz bırakıldı. Toprak solucanları 96 saat sonra ötenazi edildi ve solucanların fiksasyonu yapıldı. Toprak solucanlarının vücut duvarlarındaki epidermis, halkasal ve boyuna kaslar , klorojen hücrelerindeki ve bağırsak epitelindeki histolojik değişiklikler değerlendirildi. Histopatolojik değişiklikler düşük doz 5 mg/kg uygulama grubuna göre orta 10 mg/kg ve yüksek doz 20 mg/kg uygulama gruplarında daha belirgindi. Fenamiphos maruziyetinden sonra elde ettiğimiz bulgulara göre derideki ve bağırsak sistemindeki dejenerasyon bu iki sistemin fonksiyonunu tam olarak yerine getirememesi sonucu toprak solucanlarının canlılıklarını sürdürmeleri üzerine olumsuz etkiye neden olabilir

Keywords

Fenamiphos, toprak solucanı, bağırsak, vücut duvarı

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