We explored the conditions under which playbacks of male @entity12128 , @entity12128 , song induced reproduction in females. In a laboratory study, a rise in faecal @entity2931 levels predicted egg laying. Song playbacks by themselves induced a decrease in @entity2931 levels. There was an increase in @entity2931 levels, followed by egg laying, when the song was broadcast from inside a male model positioned away from the nest. However, this effect occurred only when a second, silent male model was perched on the rim of the nest. If song was broadcast from inside the model perched on the nest, there was no increase in @entity2931 levels. We conclude that tests of song efficacy in female songbirds must respect some contextual rules, which are likely to vary between species. Only then does it become possible to ascertain which sounds are most effective in inducing physiological changes leading to reproduction. Copyright 1998 The Association for the Study of Animal Behaviour. Copyright 1998 The Association for the Study of Animal Behaviour.

Context determines the sex appeal of male XXXX song.

@entity12128 :: ('59729', 'Species') :: ['Taeniopygia guttata', 'zebra finch'] @entity2931 :: ('CHEBI:50114', 'Chemical') :: ['oestrogen']
@entity12128 :: (59729,Species) :: ['zebra finch']
