Journal article
Organizational effects of maternal testosterone on reproductive behavior of adult house sparrows
Developmental neurobiology (Hoboken, N.J.), Vol.68(14), pp.1538-1548
12/2008
Handle:
https://hdl.handle.net/2376/107304
PMID: 18814315
Abstract
Despite the well-known, long-term, organizational actions of sex steroids on phenotypic differences between the sexes, studies of maternal steroids in the vertebrate egg have mainly focused on effects seen in early life. Long-term organizational effects of yolk hormones on adult behavior and the underlying mechanisms that generate them have been largely ignored. Using an experiment in which hand-reared house sparrows (Passer domesticus) from testosterone- or control-treated eggs were kept under identical conditions, we show that testosterone treatment in the egg increased the frequency of aggressive, dominance, and sexual behavior of 1-year-old, reproductively competent house sparrows. We also show that circulating plasma levels of progesterone, testosterone, 5alpha-dihydrotestosterone, and 17beta-estradiol did not differ between treatment groups. Thus, a simple change in adult gonadal hormone secretion is not the primary physiological cause of long-term effects of maternal steroids on adult behavior. Rather, differences in adult behavior caused by exposure to yolk testosterone during embryonic development are likely generated by organizational modifications of brain function. Furthermore, our data provide evidence that hormone-mediated maternal effects are an epigenetic mechanism causing intra-sexual variation in adult behavioral phenotype.
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Details
- Title
- Organizational effects of maternal testosterone on reproductive behavior of adult house sparrows
- Creators
- Jesko Partecke - Center for Reproductive Biology, School of Biological Sciences, Washington State University, Pullman, Washington 99164-4236, USA. partecke@orn.mpg.deHubert Schwabl
- Publication Details
- Developmental neurobiology (Hoboken, N.J.), Vol.68(14), pp.1538-1548
- Academic Unit
- Biological Sciences, School of
- Publisher
- United States
- Identifiers
- 99900546773201842
- Language
- English
- Resource Type
- Journal article