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首页> 外文期刊>Environmental toxicology and chemistry >Assessing Recovery of In Vitro Steroid Production in Male Rainbow Darter (Etheostoma caeruleum) in Response to Municipal Wastewater Treatment Plant Infrastructure Changes
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Assessing Recovery of In Vitro Steroid Production in Male Rainbow Darter (Etheostoma caeruleum) in Response to Municipal Wastewater Treatment Plant Infrastructure Changes

机译：评估响应市政污水处理厂基础设施变化而恢复的雄性彩虹Dar（Etheostoma caeruleum）体外类固醇生产的恢复

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The present study examined in vitro 11-ketotestosterone and testosterone production by the testes of rainbow darter (Etheostoma caeruleum) collected from selected reference sites and downstream of 2 municipal wastewater treatment plants (MWWTPs; Waterloo and Kitchener) on the central Grand River (Ontario, Canada), over a 6-yr period (2011-2016). The main objective was to investigate if infrastructure upgrades at the Kitchener MWWTP in 2012 resulted in a recovery of this response in the post-upgrade period (2013-2016). Two supporting studies showed that the fall season is appropriate for measuring in vitro sex steroid production because it provides stable detection of steroid patterns, and that the sample handling practiced in the present study did not introduce a bias. Infrastructure upgrades of the Kitchener MWWTP resulted in significant reductions in ammonia and estrogenicity. After the upgrades, 11-ketotestosterone production by MWWTP-exposed fish increased in 2013 and it continued to recover throughout the study period of 2014 through 2016, returning to levels measured in reference fish. Testosterone production was less sensitive and it lacked consistency. The Waterloo MWWTP underwent some minor upgrades but the level of ammonia and estrogenicity remained variable over time. The production of 11-ketotestosterone and testosterone in rainbow darter below the Waterloo MWWTP was variable and without a clear recovery pattern over the course of the present study. The results of the present study demonstrated that measuring production of sex steroids (especially 11-ketotestosterone) over multiple years can be relevant for assessing responses in fish to environmental changes such as those resulting from major infrastructure upgrades. (C) 2017 SETAC
机译：本研究研究了从选定参考地点和大中部河中部（安大略省，安大略省）的两个市政废水处理厂（MWWTP； Waterloo和Kitchener）的下游收集的彩虹飞虫（Etheostoma caeruleum）睾丸的体外11-酮睾酮和睾丸激素的产生。加拿大），为期6年（2011-2016年）。主要目标是调查2012年Kitchener MWWTP的基础设施升级是否导致升级后阶段（2013-2016年）恢复了对策。两项支持性研究表明，秋天季节适合测量体外性类固醇的产生，因为它提供了对类固醇模式的稳定检测，并且本研究中采用的样品处理方法不会产生偏差。 Kitchener MWWTP的基础设施升级导致氨和雌激素的显着降低。升级后，暴露于MWWTP的鱼的11-酮睾丸酮产量在2013年增加，并且在2014年至2016年的整个研究期内继续恢复，恢复到参考鱼中测得的水平。睾丸激素的产生较不敏感，并且缺乏一致性。滑铁卢MWWTP进行了一些较小的升级，但氨水平和雌激素水平随时间变化。在本研究过程中，滑铁卢MWWTP下方彩虹飞镖中11-酮睾酮和睾丸激素的产生是可变的，并且没有明确的恢复模式。本研究的结果表明，测量多年中性类固醇（特别是11-酮睾丸激素）的产量可能与评估鱼类对环境变化（如主要基础设施升级所引起的变化）的响应有关。 （C）2017年SETAC

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