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'.
From: Ms. Slyk <firstname.lastname@example.org>
To: email@example.com <firstname.lastname@example.org>; email@example.com
Date: Wednesday, April 10, 2002 1:09 PM
Subject: humpback whales
>I have a question about humpback whales. What is the difference between
>Southern and Northern Humpback whales in appearance.
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