Low-frequency background noise in the ocean has increased 32-fold since the 1950’s. The most widespread source of marine anthropogenic noise is from vessels: the worldwide commercial fleet has grown from approximately 30,000 vessels (~85,000,000 gross tons) in 1950 to 89,899 vessels (605,000,000 gross tons) in 2003. Worldwide non-commercial vessels, including recreational craft and private boats, have also increased, although no official log of actual numbers exists. Furthermore, port turn-around times are shorter resulting in ships spending more days per year at sea and vessels have greater average speeds, propulsion power, and propeller tip speeds. Sound levels were seen to increase by 15 dB between 1950 and 1975 as a direct result of shipping activities. These trends are certain to continue, posing unique challenges for aquatic animals.

Research at the ICER investigates the effects of vessel related noise on fish; focusing on the impacts of noise, masking and vibrations on the behaviour of keystone, commercial and conservationally important species. Outputs from this work will help determine whether fish populations can adapt quickly enough to survive in areas of noise pollution. If they cannot, there may be serious consequences for marine food webs and the fisheries industry. This EPSRC and FugroEMU Ltd funded project will provide research to aid in setting criteria necessary for legislation to limit levels of noise pollution from anthropogenic activities.

Media:

Common goby, a species whose vocalisations during courtship could be effected by anthropogenic noise

People:

Sarah Neenan

Rayner Piper

Prof. Paul White

Dr Pete Shaw

Prof. Paul Kemp

Prof. Tim Leighton