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Date: | Mon, 16 Feb 2004 08:46:38 +1300 |
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> Is Marisa c. there in any great numbers? And how do they "escape"
>into any headwaters? Are the larva carried in fish gills as are many
>species of mollusks in Kentucky waters?
> Art
By "escaped" you should read "was introduced to" by someone dumping
aquarium contents...
Only bivalves of the Unionoidea are parasitic on fish gills. Marisa,
an operculate gastropod, I believ hatches as a "nymph" from its eggs
and crawls away (someone please correct me if I'm wrong!).
In a Fort Myers river I saw large numbers of large Marisa, and
clooected quite a few. Really nice shells...
--
Andrew Grebneff
Dunedin, New Zealand
64 (3) 473-8863
<[log in to unmask]>
Fossil preparator
Seashell, Macintosh & VW/Toyota van nut
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I want your sinistral gastropods!
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Opinions in this e-mail are my own, not those of my institution
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A: Because it reverses the logical flow of conversation.
Q: Why is top posting frowned upon?
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