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In January 2006, a juvenile female bottlenosed whale became trapped in the Thames in the centre of London. The event attracted international interest. Rescue of the whale was attempted but failed. This paper describes these events and discusses the role of underwater sound in whale navigation. The effect of high-energy waveguide modified signals producing whale-like signatures capable of inducing...
Marine mammals are used increasingly as a vehicle through which environmental compliance is measured. The special status of marine mammals within both statute and public opinion are built upon a foundation of knowledge about the utility of marine mammals as indicators of marine environmental state. Quantifying the risk to marine mammals is therefore an important part of the environment assessments...
Pod-track is aimed at detecting, tracking and possibly identifying individual wild dolphins from their whistles. It is based on an array of hydrophones that provides enhanced detection range and localization accuracy compared with a single hydrophone, but is compact enough to be deployed from a small boat. This paper is concerned mainly with the azimuth localization technique that will be used and...
A fast, robust technique is needed to facilitate studies of vocalisations by dolphins and other marine mammals such as whales in which large quantities of acoustic data are commonly generated. It is sometimes necessary to be able to describe whistle contours quantitatively, rather than simply looking at descriptors such as start frequency, maximum frequency, number of inflection points, etc. This...
Man-made or anthropogenic noise generated by seismic survey is of concern in marine environmental circles as a possible cause of damage and behavioral disturbance to marine mammals. Equipment devised to allow acoustic noise monitoring during long-line fishing in the southern Atlantic Ocean is described. In particular, unusual acoustic signatures, which may be ascribed to seismic survey activities...
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