This is an analysis of the complex issues that relate to the conservation of whales, dolphins and other cetaceans. Experts from both the scientific and conservation communities provide contributions that, firstly, review the threats that cetaceans are faced with in a modern world - some of which are now well understood - and secondly, critically assess responses which have been made to these threats. The chapters reflect the diversity of opinion that exists in this field. Topics covered include: pollution issues; habitat degradation; noise; global change; disease; and the special case of the river dolphins. Apposite authors also consider the international agreements that affect cetaceans (including the International Whaling Commission) and the role of sanctuaries and action plans.