title: Social behaviour of testosterone-injected male ducklings in the presence of oestrogen-treated females.
mesh_terms: D000374:Aggression / Q000187:drug effects; D000818:Animals; D004372:Ducks; D004958:Estradiol / Q000494:pharmacology*; D005260:Female; D006801:Humans; D007273:Injections, Intramuscular; D008297:Male; D012726:Sexual Behavior, Animal / Q000187:drug effects*; D013739:Testosterone / Q000494:pharmacology*
chemical_list: D013739:Testosterone; D004958:Estradiol