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首页> 外文期刊>Aquatic Toxicology >Copper interacts with nonylphenol to cancel the effect of nonylphenol on fish chemosensory behaviour.
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Copper interacts with nonylphenol to cancel the effect of nonylphenol on fish chemosensory behaviour.

机译：铜与壬基酚相互作用可消除壬基酚对鱼类化学感应行为的影响。

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The majority of ecotoxicological studies have been concerned with responses of organisms to a single contaminant. While this approach remains valid, the challenge now is to understand the way in which multiple contaminants and stressors interact to produce effects in study organisms. Here we take an integrated biological and physico-chemical approach to understand the effects of 4-nonylphenol and copper on fish (white perch, Morone americana) chemosensory behaviour. We show that a one hour exposure to 2 micro g L-1 nonylphenol removes chemosensory attraction to conspecific chemical cues, while exposure to 5 micro g L-1 copper for one hour had no significant effect on the fish's attraction to these cues. Further, we show that simultaneous exposure to both contaminants at the stated dosage and for the same duration has no significant effect on the chemosensory attraction of white perch to conspecific chemical cues suggesting that copper mediates the effect of nonylphenol on fish in this respect. Physico-chemical data show that copper ions bind to nonylphenol in water, providing a mechanistic explanation for this change in the effect of nonylphenol. Furthermore, the finding that the copper ions bind to the lone pair of O on the nonylphenol molecule offers the tantalising possibility that it is this region of the nonylphenol molecule that plays the key role in disrupting fish chemical communication.
机译：大多数生态毒理学研究都涉及生物对单一污染物的反应。尽管这种方法仍然有效，但现在的挑战是了解多种污染物和应激源相互作用的方式，从而在研究有机体中产生作用。在这里，我们采用一种综合的生物学和物理化学方法来了解4-壬基酚和铜对鱼类（白鲈，Morone americana）化学感应行为的影响。我们显示，一小时暴露于2微克L -1 壬基酚会消除对特定化学线索的化学感应吸引，而一暴露于5微克L -1 铜则持续一小时对这些线索对鱼的吸引力没有显着影响。此外，我们表明，在规定的剂量下和在相同的持续时间内同时暴露于两种污染物，对白鲈对同种化学线索的化学感应吸引没有显着影响，这表明铜在这方面介导了壬基酚对鱼类的影响。物理化学数据表明，铜离子与水中的壬基酚结合，为壬基酚作用的这种变化提供了机理解释。此外，发现铜离子结合到壬基酚分子上的O孤对上的发现提供了诱人的可能性，就是壬基酚分子的这一区域在破坏鱼类化学交流中起关键作用。

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