Social context may affect urinary excretion of 11-ketotestosterone in African cichlids

Social context may affect urinary excretion of 11-ketotestosterone in African cichlids Social context may affect urinary excretion of 11-ketotestosterone in African cichlids Katharina Hirschenhauser 1,5) , Adelino V.M. Canário 2) , Albert F.H. Ros 3) , Michael Taborsky 4) & Rui F. Oliveira 3) ( 1 Konrad Lorenz Research Station Gruenau, University of Vienna, Austria; 2 Centro de Ciências do Mar, Universidade do Algarve, Faro, Portugal; 3 Unidade de Investigação em Eco-Etología, Instituto Superior de Psicologia Aplicada, Lisbon, Portugal; 4 Konrad Lorenz Institute for Ethology (KLIVV), Vienna and Department of Behavioural Ecology, Zoological Institute, University of Bern, Switzerland) Summary We previously investigated the androgen responsiveness of males to simulated partner and territory intrusions in five African cichlid species ( Neolamprologus pulcher , Lamprologus callipterus , Tropheus moorii , Pseudosimochromis curvifrons , Oreochromis mossambicus ; Hirschenhauser et al., 2004). Here we re-analysed data on 11-ketotestosterone (11-KT) levels in holding water to compare the free (presumably from the gills) and conjugated (presumably from urine and faeces) 11-KT fractions. We sampled (i) pre-test baseline control levels from individual males in social isolation and (ii) response levels released after social interactions, either with an ovulating female or a male territory intruder. In four out of five species, con- jugated metabolites contributed to the http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Behaviour Brill

Social context may affect urinary excretion of 11-ketotestosterone in African cichlids

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Publisher
Brill
Copyright
© 2008 Koninklijke Brill NV, Leiden, The Netherlands
ISSN
0005-7959
eISSN
1568-539X
DOI
10.1163/156853908785765935
Publisher site
See Article on Publisher Site

Abstract

Social context may affect urinary excretion of 11-ketotestosterone in African cichlids Katharina Hirschenhauser 1,5) , Adelino V.M. Canário 2) , Albert F.H. Ros 3) , Michael Taborsky 4) & Rui F. Oliveira 3) ( 1 Konrad Lorenz Research Station Gruenau, University of Vienna, Austria; 2 Centro de Ciências do Mar, Universidade do Algarve, Faro, Portugal; 3 Unidade de Investigação em Eco-Etología, Instituto Superior de Psicologia Aplicada, Lisbon, Portugal; 4 Konrad Lorenz Institute for Ethology (KLIVV), Vienna and Department of Behavioural Ecology, Zoological Institute, University of Bern, Switzerland) Summary We previously investigated the androgen responsiveness of males to simulated partner and territory intrusions in five African cichlid species ( Neolamprologus pulcher , Lamprologus callipterus , Tropheus moorii , Pseudosimochromis curvifrons , Oreochromis mossambicus ; Hirschenhauser et al., 2004). Here we re-analysed data on 11-ketotestosterone (11-KT) levels in holding water to compare the free (presumably from the gills) and conjugated (presumably from urine and faeces) 11-KT fractions. We sampled (i) pre-test baseline control levels from individual males in social isolation and (ii) response levels released after social interactions, either with an ovulating female or a male territory intruder. In four out of five species, con- jugated metabolites contributed to the

Journal

BehaviourBrill

Published: Jan 1, 2008

Keywords: CHALLENGE; CICHLID; CONJUGATED METABOLITES; NON-INVASIVE METHODS; STEROID EXCRETION; URINE; GILL DIFFUSION; ANDROGEN RESPONSES

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