Date: Thu, 18 May 2000 08:11:34 -0300 From: Vitor Fernandes Oliveira de Miranda <vmiranda@rc.unesp.br> To: cp@opus.hpl.hp.com Message-Id: <aabcdefg1577$foo@default> Subject: Re: Utric's and daphnia 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.
> ---------------------------
> = Howard Wu =
> = Bishop, CA =
> = mrwu@qnet.com =
> ---------------------------
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.
------
Vitor Fernandes Oliveira de Miranda
Botanical Department
Sao Paulo State University
Rio Claro-SP, Brazil
e-mail: vmiranda@rc.unesp.br
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