Date: Thu, 18 May 2000 22:04:02 +0000 From: <mrwu@cello.qnet.com>(Howard J. Wu L.ac) To: cp@opus.hpl.hp.com Message-Id: <aabcdefg1583$foo@default> Subject: Daphnia- Utric's speculation.
Howard wrote:
> Perhaps this is an example of evolutionary convergence based on
function.
> Thus both utrics and daphnia feeding on smaller prey may have
developed
> filter feeding structures roughly comparable because it works.
>
Dear Howard,
I agree about both utrics and daphnia feed small preys. Therefore, it
does not mean that utrics *filter* water to get food. Small crustaceans
filter water to get smaller particles, usualy from organic matter in
decomposition. In the other hand, utrics entrap and catch *alive* small
animals, that is the difference. So, I do not agree in place utrics
species among *filter organisms*.
Regards,
Vitor.
Cast your net lots of times or leave your net out wait for food to come to
you. You're still need a similar net. Call it 'filtering" or 'trapping'
it just a matter of time perception. Realize there are difference but we
are talking about structural design not behavior in acquiring same prey.
__________________________
= Howard J. Wu. L.ac =
= Bishop, CA =
= mrwu@qnet.com =
__________________________
This archive was generated by hypermail 2b30 : Tue Jan 02 2001 - 17:35:08 PST