title: Temperature dependent action of estrogen in Singi fish (Heteropneustes fossilis Bloch).
abstract: The responsiveness of the non-vitellogenic Singi fish to exogenous estrogen has been studied at different environmental temperatures. Estrogen was found to be effective in fish kept at 25 degree C and 30 degree C, as evidenced from the increase in hepatosomatic index (HSI), plasma protein and liver protein and RNA contents, and a fall in liver glycogen content after injections of estradiol dipropionate (1 microgram/g) for 7 consecutive days. Such estrogen-induced changes were not observed in the fish kept at 15 degree C, indicating the ineffectiveness of this sex steroid at this lower temperature.
mesh_terms: D000064:Acclimatization; D000818:Animals; D001798:Blood Proteins / Q000378:metabolism; D001835:Body Weight / Q000187:drug effects; D004247:DNA / Q000378:metabolism; D004958:Estradiol / Q000031:analogs & derivatives* / Q000494:pharmacology; D005260:Female; D005399:Fishes / Q000378:metabolism*; D008099:Liver / Q000187:drug effects / Q000378:metabolism; D008112:Liver Glycogen / Q000378:metabolism; D009929:Organ Size / Q000187:drug effects; D011506:Proteins / Q000378:metabolism; D013696:Temperature
chemical_list: D001798:Blood Proteins; D008112:Liver Glycogen; D011506:Proteins; D004958:Estradiol; D004247:DNA; C023482:estradiol dipropionate