difference between northern and southern humpback whales

From: Cathy Schaeff (schaeff@american.edu)
Date: Wed Apr 10 2002 - 14:00:39 EDT

Hi Edith,

Whales in the Northern and Southern Hemisphere do not interbreed because
their reproductive cycles are 6 months out of phase. This means there is
restricted gene flow between the two and so differences could occur but all
of the sources I checked gave a single description for humpbacks in the
northern and southern hemispheres. Different stocks of whales do have
regional song 'dialects'.

-----Original Message-----
From: Ms. Slyk <photoam@istar.ca>
To: schaeff@american.edu <schaeff@american.edu>; pita@whale.wheelock.edu
Date: Wednesday, April 10, 2002 1:09 PM
Subject: humpback whales

>Dear Scientists,
>I have a question about humpback whales. What is the difference between
>Southern and Northern Humpback whales in appearance.

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