Masculinized dominant females in a cooperatively breeding species.

Abstract:

:The molecular mechanisms underlying complex social behaviours such as dominance are largely unknown. Studying the cooperatively breeding African cichlid Neolamprologus pulcher, we show that dominant females were similar to dominant males in dominance behaviour, high testosterone levels and brain arginine vasotocin expression (a neuropeptide involved in vertebrate territorial, reproductive and social behaviours) compared to subordinate helpers, but had lower levels of 11-ketotestosterone than males. Furthermore, brain gene expression profiles of dominant females were most similar to those of the males (independent of social rank). Dominant breeder females are masculinized at the molecular and hormonal level while being at the same time reproductively competent, suggesting a modular organization of molecular and endocrine functions, allowing for sex-specific regulation.

journal_name

Mol Ecol

journal_title

Molecular ecology

authors

Aubin-Horth N,Desjardins JK,Martei YM,Balshine S,Hofmann HA

doi

10.1111/j.1365-294X.2007.03249.x

subject

Has Abstract

pub_date

2007-04-01 00:00:00

pages

1349-58

issue

7

eissn

0962-1083

issn

1365-294X

pii

MEC3249

journal_volume

16

pub_type

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