Re: Fwd: possible role of echolocation in K-T survival

[Stanley Friesen <sarima@ix.netcom.com>]

At 07:16 PM 3/13/98 -0600, Rob Meyerson wrote:
>Stanley Friesen writes,
>
>>So, do any of the soft-tissue outlines of ichthyosaurs show 
>>evidence of a "melon" or other enlarged fatty organ anywhere near 
>>the front of the animal? If so, then they probably echolocated.
>
>However, this assumes that a melon is required for echolocation.  

Nope.  It assumes a melon is positive indication of echolocation.  Note I
never say *absence* of a melon indicates they *didn't* echolocate.  I only
assert melon=>echolocation, not melon<=>echolocation

>Bats echolocate just fine using only their ears, which would 
>suggest that there are multiple ways of making echolocation 
>feasable.
>
>Admittedly, there could be differences in echolocation 
>strategies/requirements for air and water.  

I suspect that this is the case, however.

--------------
May the peace of God be with you.         sarima@ix.netcom.com
                                          sfriesen@netlock.com