Brood Reduction via Intra-clutch Variation in Testosterone - An Experimental Test in the Great Tit

• Katarzyna Podlas ,

  * E-mail: podlas.kasia@gmail.com

  Affiliation Institute of Ecology and Evolution, University of Bern, Bern, Switzerland

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• Fabrice Helfenstein,

  Affiliations Institute of Ecology and Evolution, University of Bern, Bern, Switzerland, Institute of Biology, University of Neuchâtel, Neuchâtel, Switzerland

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• Heinz Richner

  Affiliation Institute of Ecology and Evolution, University of Bern, Bern, Switzerland

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