Diving behaviour of a Baird’s beaked whale, Berardius bairdii , in the slope water region of the western North Pacific: first dive records using a data logger

Abstract

A depth and temperature data logger was deployed by air gun on an individual Baird’s beaked whale ( Berardius bairdii ) off the Pacific coast of Japan. The retrieved data logger recorded 81 dives over approximately 29 h. The maximum recorded depth and the longest dive duration were 1777 m and 64.4 min, respectively. All dives were classified into three categories by depth: deep dives (>1000 m), intermediate dives (100–1000 m), and shallow dives (

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