The influence of day length upon the egg-laying of Biomphalaria glabrata.
D000818:Animals; D001683:Biological Clocks; D001700:Biomphalaria / Q000254:growth & development / Q000502:physiology*; D005260:Female; D008027:Light; D010063:Ovum; D010775:Photic Stimulation; D012098:Reproduction; D013057:Spectrum Analysis