[MARMAM] New Publication: The spectacled porpoise in Antarctic waters

Keiko Sekiguchi, PhD ksekiguc at hawaii.edu
Thu Mar 22 18:49:21 PDT 2007

Dear MARMAM subscribers,

I would like to inform that the following paper has been published on the 
Journal of Cetacean Research and Management.

Sekiguchi, K., Olavarria, C., Morse, L.,  Olson, P., Ensor, P., Matsuoka, 
K., Pitman, R., Findlay, K. and Gorter, U.  2006.
The spectacled porpoise (Phocoena dioptrica) in Antarctic waters.  J. 
Cetacean Res. Manage. 8(3):265-271.


Most knowledge on the biology and ecology of the spectacled porpoise 
(Phocoena dioptrica) has been obtained from stranded specimens,
with less than fifteen confirmed sightings in the sea. Published 
photographs of live animals in their natural environment are also very rare.
In this study, 28 live sightings are summarised, from Antarctic and sub 
Antarctic waters (mainly from the 1978-2004 IWC-IDCR/SOWER
cruises). These sightings supported the suggested circumpolar and offshore 
distribution of this species; however, this was extended further
south than previously thought, into Antarctic waters. The sea surface 
temperature recorded at the time of each sighting ranged from 0.9-
10.3°C, with most of the sightings (52.0%) in waters 4.9-6.2°C. Group 
size was small, averaging 2.0 (SD=0.92) animals per group. A total
of six cow-calf pairs were observed and all such pairs were accompanied by 
one or two additional adults, always including a mature male.
Based on observations at sea and new photographs of live animals, a pale ‘ 
saddle’ around the dorsal fin was noticed and is described for
the first time. The porpoises generally showed fast swimming behaviour when 
the vessel approached, resembling the swimming behaviour
of harbour porpoises.

A PDF file or an old fashioned hard copy reprint is available from the 
first author in the address below.


Keiko Sekiguchi, Ph.D.

KEIKO SEKIGUCHI, Ph.D. (Cetacean Biology)
Pacific Aquaculture and Coastal Resources Center
University of Hawaii at Hilo
200 W. Kawili Street, Hilo, HI  96720   USA
Tel:    +1-808-933-0706
Fax:    +1-808-933-0704
E-mail: ksekiguc at hawaii.edu
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