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Post by finch on May 18, 2017 21:20:56 GMT
Hello everyone, I was at a natural history museum that has a large pond on a trail, and I was looking around the bank of the pond with my friends. We spotted some little aquatic snails, and I put a trio in a jar to study at home. I have pond water, some tiny rocks, a stick and a leaf in the jar, and they seem to like it. They look almost exactly like these: www.google.com/search?q=aquatic+snail+in+nc&source=lnms&tbm=isch&sa=X&ved=0ahUKEwjKl8mkq_rTAhUCNiYKHZLkA7AQ_AUICygC&biw=1366&bih=638#imgrc=hBicjWvefMEOiM:So I think if you can identify those, that will be what mine are. They seem pretty happy, snailing around the jar. I think the smallest one may be a bit problematic though. It keeps trying to poke its head into the biggest snail's shell! The bigger guy just shakes his shell wildly and the little dude stops for a minute or two. The little one also rode on the big guy's shell for a while, which seemed to annoy "Big Guy" even more. I may end up taking "Little Dude" back to the pond if he's annoying Big Guy. Looking at them now, I see distinct spotting on their shells, if that's of any significance. Their shells are about the size of an uncooked pinto bean. If anyone else has had success with wild-caught aquatic snails, please let me know what you fed them, how their habitat was set up, etc. Do I feed them fish food? I may be able to buy algae-based food if they end up needing that. Okay, this is a very weird question, but what does their poop look like? They've been dropping things that look like a smaller version of normal snail poop, so... Thank you so much! -paracosmic
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Post by wolf on May 19, 2017 8:10:16 GMT
Hi paracosmic, sorry, but at my PC the link doesnΒ΄t work........ . Where is the natural history museum (state)? How large is an uncooked pinto bean? Kind regards: wolf
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Post by finch on May 19, 2017 13:35:24 GMT
Hi paracosmic, sorry, but at my PC the link doesnΒ΄t work........ . Where is the natural history museum (state)? How large is an uncooked pinto bean? Kind regards: wolf Oh! The museum is in North Carolina, and the snails are around the size of a pencil eraser and a half. Sorry, I can't find a ruler or tape measure to actuslly give an exact measurement.
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Post by wolf on May 21, 2017 16:00:14 GMT
Hi paracosmic, sorry, but without any picture it's impossible for me to have a guess. Kind regards: wolf
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Post by jroberts on May 22, 2017 5:56:08 GMT
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Post by wolf on May 22, 2017 10:11:26 GMT
jroberts: thanks a lot for your help. I think I can see the right picture now: finch: sorry, the picture isn't too good or informative. Obviously, the apex is on the right and the aperture on the left side. If the picture isn't mirrored, the shell is sinistral (= "left-handed"). So it should be family Physidae. I don't know which species of Physa/Physella are living in North Carolina. In Physidae it's often necessary to do a dissection (genital morphology) to make a reliable identification of the species. Kind regards: wolf
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Post by wolf on May 22, 2017 11:54:30 GMT
Hi, there is an older paper: Dawley, C. (1965): Checklist of freshwater mollusks of North Carolina -- Sterkiana 19: 35-39 In NC there should be (at least): Physa acuta, Physa carolinae, Physa gyrina and Physa pomilia. Kind regards: wolf
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Post by finch on May 22, 2017 15:55:07 GMT
Thank you both for your help, I released the snails a few days ago because I had never planned on keeping them. Maybe I'll go and get a couple more later this summer.
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Post by wolf on May 22, 2017 16:23:55 GMT
Hi paracosmic, o.k.. I've read your first post again: species of the Physidae are known to "shake their shells wildly". The spots you have seen are not in/on the shell, but on the "mantle" (shining through the shell). Kind regards: wolf
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Post by finch on May 23, 2017 13:27:15 GMT
Now it's obvious that mine were Physidae (if that's how you spell it)! Thanks everybody.
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