title: Role of photoperiod and melatonin in seasonal acclimatization of the Djungarian hamster, Phodopus sungorus.
mesh_terms: D000064:Acclimatization / Q000187:drug effects; D000818:Animals; D006224:Cricetinae / Q000502:physiology*; D004343:Drug Implants; D005260:Female; D008027:Light; D008297:Male; D008550:Melatonin / Q000494:pharmacology*; D010507:Periodicity; D012621:Seasons
chemical_list: D004343:Drug Implants; D008550:Melatonin