At 10:24 AM 12/15/2004 -0700, you wrote:
>Hey Conch-Lers,
>
>I received an interesting request recently about age rings in freshwater
>mollusks.  The answer is not an easy one and I have included my attempt at
>an answer.  If anyone else can help this individual please respond to him
>directly ([log in to unmask] and PLEASE info me as I would be most
>interested - in fact, a lot of Conch-Lers might also be interested).
>Thanks,
>
>Tom Eichho





>Rings are often used as annular marks on unionids, although there is
>evidence to the contrary. We have two Pyganodon grandis that we raised
>from "off the fish" two years ago. Unfortunately they have 4 "annular" rings.




G. Thomas Watters, PhD
Curator of Molluscs
Museum of Biological Diversity
Department of Evolution, Ecology & Organismal Biology
The Ohio State University
1315 Kinnear Road
Columbus, OH 43212 USA
[log in to unmask]
v: 614-292-6170
f: 614-292-7774

Visit the Mollusc Division at:
http://www.biosci.ohio-state.edu/~molluscs/OSUM2

"Let me take you, baby, down to the riverbed,
  Gotta tell you something go right to your head" - Spirit

So join the Freshwater Mollusc Conservation Society at:
http://ellipse.inhs.uiuc.edu/FMCS/index.html

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