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首页> 外文期刊>Environmental toxicology and chemistry >OCCURRENCE AND DEGREE OF INTERSEX (TESTIS-OVA) IN DARTERS (ETHEOSTOMA SPP.) ACROSS AN URBAN GRADIENT IN THE GRAND RIVER, ONTARIO, CANADA
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OCCURRENCE AND DEGREE OF INTERSEX (TESTIS-OVA) IN DARTERS (ETHEOSTOMA SPP.) ACROSS AN URBAN GRADIENT IN THE GRAND RIVER, ONTARIO, CANADA

机译：加拿大安大略省大河沿岸的飞镖（ETHEOSTOMA SPP。）中双性（TESTIS-OVA）的发生和程度

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摘要

The variability and extent of the intersex condition (oocytes in testes, or testis-ova) was documented in fish along an urban gradient in the Grand River, Ontario, Canada, that included major wastewater treatment plant outfalls. A method for rapid enumeration of testis-ova was developed and applied that increased the capacity to quantify intersex prevalence and severity. Male rainbow darters (Etheostoma caeruleum) sampled downstream of the first major wastewater outfall (Waterloo) had a significant increase, relative to 4 upstream reference sites, in the mean proportion of fish with at least 1 testis-oocyte per lobe of testes (9-20% proportion with ≤ 1 testis-oocyte/lobe vs 32-53% and ＞1.4 testis-oocyte/lobe). A much higher mean incidence of intersex proportion and degree was observed immediately downstream of the second wastewater outfall (Kitchener; 73-100% and 8-70 testis-oocyte/lobe); but only 6.3 km downstream of the Kitchener outfall, the occurrence of intersex dropped to those of the reference sites. In contrast, downstream of a tertiary treated wastewater outfall on a small tributary, intersex was similar to reference sites. Estrogenicity, measured using a yeast estrogen screen, followed a similar pattern, increasing from 0.81 ± 0.02 ng/L 17b-estradiol equivalents (EEq) (Guelph), to 4.32 ± 0.07 ng/L (Waterloo), and 16.99 ± 0.40 ng/L (Kitchener). Female rainbow darter downstream of the Kitchener outfall showed significant decreases in gonadosomatic index and liver somatic index, and increases in condition factor (k) relative to corresponding reference sites. The prevalence of intersex and alterations in somatic indices suggest that exposure to municipal wastewater effluent discharges can impact endocrine function, energy use, and energy storage in wild fish.
机译：在加拿大安大略省大河沿城市梯度的鱼类中记录了性交状态（睾丸中的卵母细胞或睾丸卵）的变异性和程度，其中包括主要的污水处理厂排污口。开发并应用了一种快速枚举睾丸卵的方法，该方法提高了量化两性流行和严重程度的能力。相对于4个上游参考地点，在第一个主要废水排放口（Waterloo）下游采样的雄性彩虹（Etheostoma caeruleum）的平均比例显着增加，每个睾丸叶中至少有1个卵母细胞的鱼的平均比例（9-睾丸-卵母细胞/叶≤1的比例为20％，而睾丸-卵母细胞/叶的比例为32-53％和> 1.4。在第二次废水排放口的下游立即观察到雌雄同体比例和程度的平均发生率更高（Kitchener； 73-100％和8-70睾丸-卵母细胞/叶）；但仅在基奇纳河出水口下游6.3公里处，双性恋的发生率下降到了参考地点。相反，在小支流的两性经三级处理废水的下游，两性与参考点相似。使用酵母雌激素筛查法测得的雌激素性遵循相似的模式，从0.81±0.02 ng / L 17b-雌二醇当量（EEq）（Guelph）增加到4.32±0.07 ng / L（Waterloo）和16.99±0.40 ng / L L（厨房）。 Kitchener出水口下游的雌性彩虹突进者相对于相应的参考部位，其性腺体指数和肝体指数显着降低，并且条件因子（k）升高。男女两性的普遍存在和躯体指数的变化表明，暴露于市政废水排放会影响野生鱼的内分泌功能，能量利用和能量存储。

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  • 来源
    《Environmental toxicology and chemistry》 |2013年第9期|1981-1991|共11页
  • 作者

    Rajiv N. Tanna; Gerald R. Tetreault; Charles J. Bennett; Brendan M. Smith; Leslie M. Bragg; Ken D. Oakes; Mark E. McMaster; Mark R. Servos;

  • 作者单位

    Department of Biology, University of Waterloo, Waterloo, Ontario, Canada;

    Department of Biology, University of Waterloo, Waterloo, Ontario, Canada,Emerging Methods Section, Environment Canada, Burlington, Ontario, Canada;

    Emerging Methods Section, Environment Canada, Burlington, Ontario, Canada;

    Emerging Methods Section, Environment Canada, Burlington, Ontario, Canada;

    Department of Biology, University of Waterloo, Waterloo, Ontario, Canada;

    Department of Biology, University of Waterloo, Waterloo, Ontario, Canada;

    Emerging Methods Section, Environment Canada, Burlington, Ontario, Canada;

    Department of Biology, University of Waterloo, Waterloo, Ontario, Canada;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Aquatic toxicology; Ecotoxicology; Estrogenic compounds; Reproductive toxicity; Wastewater;

    机译：水生毒理学;生态毒理学;雌激素化合物生殖毒性;废水;

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