Endosulfan acute toxicity and histomorphological alterations in Jenynsia multidentata (Anablepidae, Cyprinodontiformes)

被引:39
作者
Ballesteros, Maria L.
Bianchi, Guillermo E.
Carranza, Miriam
Bistoni, Maria A.
机构
[1] Univ Nacl Cordoba, Fac Ciencias Exactas Fis & Nat, Catedra Diversidad Anilm 2, RA-5000 Cordoba, Argentina
[2] Univ Nacl Cordoba, Catedra Morfol Anim, RA-5000 Cordoba, Argentina
关键词
fish; endosulfan; histopathology; lipid content; liver; gills; secondary lamella thickness;
D O I
10.1080/03601230701309577
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Toxicity tests using adult specimens of Jenynsia multidentata were carried out during 96 hours in order to determine the lethal concentration (LC50) of endosulfan. Histological alterations were determined in gills and liver. Gill damage was quantified as secondary lamellae thickness. The 96 hr LC50 values were significantly different between males (0.719 mu g.L-1) and females (1.317 mu g.L-1). The sex difference was attributed to the dimorphism in the lipid content in females (2.16%) and males (1.79%). Histological alterations in gills included hypertrophy and lifting of the epithelium of the secondary lamellae and aneurisms. These alterations caused a significant increase of the secondary lamellae thickness in treatment versus control fish. Finally, reversible histological alterations (such as hydropic degeneration and dilation of sinusoids) were observed in the liver of exposed fish as well as an irreversible change such as necrosis at the highest concentrations.
引用
收藏
页码:351 / 357
页数:7
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