Can anyone identify Moina (?) from a photo?

J

jennifer

Guest
I have a culture that I started from "wild" daphnia last summer. Over time, the proportion of some tiny non-daphnia crustacean has increased to where they now outnumber the daphnia. Can anyone tell me if these are Moina, or some other species? They appear to have a clam-like shell. I can't find any photos on the internet that match.

First a comparison of a full-grown Daphnia with the "unknown". Sorry about the lack of focus, the photos were taken by holding the digital camera up to the microscope eyepiece.

29664.jpg


Second, a closer picture of just the "unknown".

29665.jpg
 
Jen, they're Ostracods, or "seed shrimp". Google time!
I know Morg uses tham as food for certain newts.
 
Ah, thanks Alan. Ostracods they are. Larvae love them, so I can't complain about the infestation I seem to have.
 
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