The effects of a high magnesium-to-calcium ratio on the egg-laying rate of an aquatic planorbid snail, Biomphalaria pfeifferi.
D002118:Calcium / Q000494:pharmacology*; D005260:Female; D008274:Magnesium / Q000494:pharmacology*; D010063:Ovum / Q000187:drug effects*; D012908:Snails / Q000187:drug effects*
D008274:Magnesium; D002118:Calcium