title: Differential effects of melatonin on the testes of photoperiodic and nonphotoperiodic rodents.
mesh_terms: D000818:Animals; D006224:Cricetinae; D008027:Light; D008297:Male; D008550:Melatonin / Q000494:pharmacology*; D051379:Mice; D009929:Organ Size; D051381:Rats; D013045:Species Specificity; D013737:Testis / Q000033:anatomy & histology / Q000378:metabolism*; D013997:Time Factors
chemical_list: D008550:Melatonin