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Boat noise impacts development and survival of sea hares
Date:7/31/2014

While previous studies have shown that marine noise can affect animal movement and communication, with unknown ecological consequences, scientists from the Universities of Bristol and Exeter and the cole Pratique des Hautes tudes (EPHE) CRIOBE in France have demonstrated that boat noise stops embryonic development and increases larval mortality in sea hares.

Sea hares, (specifically the sea slug Stylocheilus striatus used in this study) usually hatch from their eggs to swim away and later feed on toxic alga but this study, conducted in a coral reef lagoon in French Polynesia, found that when exposed to playback of boat noise, more eggs failed to develop and those that hatched were more likely to die.

Lead author Sophie Nedelec, a PhD researcher at the University of Bristol and EPHE said: "Traffic noise is now one of the most widespread global pollutants. If the reproductive output of vulnerable species is reduced, we could be changing communities and losing vital ecological functions. This species is particularly important because it eats a toxic alga that affects recruitment of fish to coral reefs."

Anthropogenic (man-made) noise is now recognised as a global pollutant, appearing in national and international legislation (for example, the US National Environment Policy Act and European Commission Marine Strategy Framework Directive). Boats are found around all coastal environments where people live and the noise they make spreads far and wide. Increasingly, recent research has indicated that noise from human activities can affect the behaviour and physiology of animals, but this is the first study to show impacts on development and larval survival.

Co-author, Dr Steve Simpson, a marine biologist and senior lecturer at the University of Exeter, said: "Boat noise may cause stress or physically disrupt cells during development, affecting chances of survival. Since one in five people in the world rely on marine animals as
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Contact: Hannah Johnson
hannah.johnson@bristol.ac.uk
44-117-928-8896
University of Bristol
Source:Eurekalert

Page: 1 2

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