Behavioural endocrinology: no hormonal response in tied fights. | - CCMAR -

Journal Article

TítuloBehavioural endocrinology: no hormonal response in tied fights.
Publication TypeJournal Article
AuthorsOliveira, RF, Carneiro, LA, Canario, AVM
Year of Publication2005
Date Published2005 Sep 8
Palavras-chaveAggression, Animals, Cichlids, Competitive Behavior, Glass, Hierarchy, Social, Male, Radioimmunoassay, Social Isolation, Testosterone

Androgens are the principal sex steroids controlling reproduction and aggression in male fish, but their production can also be affected by social interactions. Here we show that androgen concentrations are not significantly increased in cichlid fish (Oreochromis mossambicus) that are fighting their own image in a mirror, despite their aggressive behaviour towards the virtual intruder. Our results indicate that the hormonal response normally triggered in male contests is not induced under these circumstances by the act of fighting itself, and that it may therefore depend on some indicator of relative fighting ability that cannot be delivered by a mirror-image challenger.


Alternate JournalNature
PubMed ID16148924
CCMAR Authors