title: Effects of restricted photoperiod and melatonin administration of gonadal weight in the Japanese killifish.
mesh_terms: D000818:Animals; D005260:Female; D005399:Fishes; D006066:Gonads / Q000033:anatomy & histology* / Q000187:drug effects; D008027:Light; D008297:Male; D008550:Melatonin / Q000494:pharmacology*; D009929:Organ Size; D010870:Pineal Gland / Q000502:physiology / Q000601:surgery; D012737:Sex Factors
chemical_list: D008550:Melatonin