Reproductive success of monogamous and polygynous pied flycatchers (Ficedula hypoleuca) |
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Authors: | T Lubjuhn Wolfgang Winkel Jörg Thomas Epplen Jörg Brün |
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Institution: | Institut für Evolutionsbiologie und ?kologie, Rheinische Friedrich-Wilhelms-Universit?t Bonn, An der Immenburg 1, 53121 Bonn, Germany e-mail: t.lubjuhn@uni-bonn.de Fax: +49-228-735129, DE Institut für Vogelforschung ”Vogelwarte Helgoland”, Au?enstation Braunschweig, Bauernstra?e 14, 38162 Cremlingen, Germany, DE Molekulare Humangenetik, Ruhr-Universit?t Bochum, 44780 Bochum, Germany, DE
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Abstract: | One of the most interesting aspects of the mating system of pied flycatchers is the regular occurrence of polygyny. Here we
present data on the reproductive success of polygynously paired pied flycatcher males compared to monogamous males based on
paternity analyses through DNA fingerprinting. Males paired with two females suffered a higher loss in reproductive output
per female compared to monogamous males due to (1) a greater proportion of unhatched eggs in their broods, (2) greater nestling
mortality and (3) a greater probability of being cuckolded. Nevertheless, the number of fledglings was significantly greater
for polygynous males. Based on the number of nestlings that returned for subsequent breeding seasons, however, the reproductive
success of monogamous and polygynous males did not differ significantly. These data raise the question as to why males attempt
polygyny.
Received: 16 August 1999 / Received in revised form: 15 March 2000 / Accepted: 18 March 2000 |
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Keywords: | Mating system Pied flycatcher Ficedula hypoleuca Extra-pair paternity Monogamy Polygyny Reproductive success |
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