title: Testicular inhibition of gonadotropin secretion in photosensitive tree sparrows (spizella arborea) exposed to a winter-like day length.
mesh_terms: D000818:Animals; D001717:Birds / Q000502:physiology*; D002369:Castration; D008027:Light; D007986:Luteinizing Hormone / Q000097:blood*; D008297:Male; D009929:Organ Size; D012621:Seasons; D013737:Testis / Q000033:anatomy & histology / Q000502:physiology*
chemical_list: D007986:Luteinizing Hormone