|MadSci Network: General Biology|
Dear Jenny, I don't have any experience working with earthworms, so I asked someone I know who works with them. He had never tagged earthworms either, but thought of the following: mix up some carbon black and carmine both in sterile distilled water and inject one or the other or both in some pattern of dots just under the integument. For example, black / red / black, black / red, red / black, red / etc. I thought perhaps one can tie very fine color coded strings around the worms loose enough to prevent injury but tight enough to stay in place. However, when earthworms are crawling their bodies get quite stretched and they may slip out of even a tight string. Look up the following book in the library. You may find something in there. Edwards, C.A. (ed.) 1998. Earthworm Ecology. Lewis Press. Good luck. Aydin Orstan
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