著者

宮崎 信之

出版者

国立科学博物館

雑誌

Bulletin of the National Science Museum. Series A, Zoology (ISSN:03852423)

巻号頁・発行日

vol.15, no.1, pp.53-59, 1989-03

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To improve knowledge of school structure of killer whale, Orcinus orca (LINNAEUS, 1758), the composition of 18 schools (705 individuals in total) were analyzed from the sighting information obtained through a 57-day sighting survey in the Southern Ocean between 115°E and 160°W. The fundamental units of the school of killer whales are considered to be the single adult male, the adult female with calf, and other whales including the juvenile whale and/or the adult female without calf. An aggregation of schools seems to be formed by combination of several large schools, each of which has some unit schools.