کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
9454711 1308542 2005 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Estrogenic effects in crucian carp (Carassius carassius) exposed to treated sewage effluent
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست شیمی زیست محیطی
پیش نمایش صفحه اول مقاله
Estrogenic effects in crucian carp (Carassius carassius) exposed to treated sewage effluent
چکیده انگلیسی
To assess the estrogenicity of a municipal sewage treatment plant, sexually mature crucian carp of both sexes were exposed for 28 days to domestic treated sewage effluent running with a constant flow of water, with tap water and with different concentrations of the sewage effluent (25%, 50% and 100%). Vitellogenin (VTG), gonadosomatic index (GSI), hepatosomatic index (HSI), and histological abnormalities were used to assess the estrogenic potency of the effluent. Results show a significant (P<0.05) increase in VTG levels in all exposed male fish. A significant (P<0.05) reduction in the GSI was only observed in fish exposed to 100% effluent. Morphological changes were detected by histological evaluation, revealing severe effects on the testes. Spermatogenesis was progressively reduced to total inhibition in fish exposed to 100% effluent. One of the most pronounced effects detected was the presence of oocytes in male gonads, observed in 20% of males exposed to 100% sewage effluent.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ecotoxicology and Environmental Safety - Volume 62, Issue 3, November 2005, Pages 427-435
نویسندگان
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