Review of Small Cetaceans: Distribution, Behaviour, Migration and Threats - Marine Mammal Action Plan / Regional Seas Reports and Studies no. 177

This report summarises the available know-ledge on odontocete (toothed whale) distribution, behaviour, migration and threats and was compiled for the Bonn Secretariat of CMS. First of all, how is the term "migration" to be interpreted? According to the Bonn Convention on the Conservation of Migratory Species of Wild Animals, "Migratory species" means the entire population or any geographically separate part of the population of any species or lower taxon of wild animals, a significant proportion of whose members cyclically and predictably cross one or more national jurisdictional boundaries".