Subject: Abstract: northern bottlenose whale diving behaviour (fwd)

Mike Williamson (pita@www1.wheelock.edu)
Fri, 16 Apr 1999 14:12:47 -0400 (EDT)

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---------- Forwarded message ----------
Date: Wed, 14 Apr 1999 10:47:21 -0400
From: Sascha Hooker <shooker@is2.dal.ca>
To: MARMAM@UVVM.UVIC.CA
Subject: Abstract: northern bottlenose whale diving behaviour


Hooker, S. K., & R. W. Baird. 1999.
Deep-diving behaviour of the northern bottlenose whale, Hyperoodon
ampullatus (Cetacea: Ziphiidae)
Proceedings of the Royal Society, London B. 266: 671-676.

Abstract:
Using suction-cup attached time-depth recorder/VHF radio tags, we
have obtained the first diving data on northern bottlenose whales,
the first such data on any species within the family Ziphiidae. Two
deployments in 1997 on northern bottlenose whales in a submarine
canyon off Nova Scotia demonstrated their exceptional diving
ability, with dives approximately every 80 min to over 800 m
(maximum 1453 m), and up to 70 min in duration. Sonar traces of
non-tagged, diving bottlenose whales in 1996 and 1997 suggest that
such deep dives are not unusual. This combined evidence leads us to
hypothesize that these whales may make greater use of deep portions
of the water column than any other mammal so far studied. Many of the
recorded dives of the tagged animals were to, or close to, the sea
floor, consistent with benthic or bathypelagic foraging. A lack of
correlation between dive times and surface intervals suggests that
the dives were predominately aerobic.

Please contact either author for reprints:

Sascha K. Hooker <shooker@is2.dal.ca>
Department of Biology, Dalhousie University, Halifax, Nova Scotia,
B3H 4J1, Canada

Robin W. Baird <rwbaird@is.dal.ca>
Research Director, Pacific Whale Foundation, 101 N. Kihei Road,
Kihei, HI 96753, USA

For a copy of this abstract, or details of other recent and
forthcoming publications from our research group, see
http://is.dal.ca/~whitelab/labpub.htm

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Sascha Hooker, PhD Student
Department of Biology, Dalhousie University, Halifax, Nova Scotia, Canada
Phone: (902) 494-3723
Fax: (902) 494-3736
email: shooker@is2.dal.ca
http://is.dal.ca/~whitelab/index.htm
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