18 Jul Science Pills: Scientists are beginning to understand the harmful effect man-made noise has on the behaviour of marine life
Posted at 09:10h
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The study, published in the journal Environmental Pollution, reported that fish exposed to engine noise had elevated levels of the stress hormone cortisol and the reproductive hormones testosterone and 11-ketotestosterone, which corresponded with the behavioural changes observed by the researchers. The techniques used by the scientists to measure hormones, which offer a window into complex behaviours, could be used to gauge the effectiveness of future noise-reduction measures.18