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
Behaviour – Brill
Published: Jan 1, 2008
Keywords: CHALLENGE; CICHLID; CONJUGATED METABOLITES; NON-INVASIVE METHODS; STEROID EXCRETION; URINE; GILL DIFFUSION; ANDROGEN RESPONSES
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