Studies of the social ecology of Norwegian killer whales (Orcinus orca)

摘要: Abstract Killer whales along the Norwegian coast have been studied since 1990 with methods based on photo-identification. Preliminary insights of social characteristics killer are presented generally. About 400 identified, and 65% resighted. The occur in groups moderate sizes, all containing adult males breeding females. seem to be units at least partly stable membership. Acoustic analyses revealed both uniqueness a variable degree similarity vocalization different whales. integrity is further indicated by cooperative feeding herring, communal care young, competitive interactions between specialized marine mammals one small group Some nomadic occurrence, and, might eventually represent mating strategy. Ritualized appear affiliation acts. Large female-sized do not differentiate diving behaviour during due synchrony respiration patterns. eresemble well-studied Canadian whales, but there also indications some intraspecific variability.