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Extrapair copulations in zebra finches : the role of the female

Obiettivo

Studies on sexual selection typically focus on individual variation in males (differences in attractiveness or competitive ability), while variation in female mating behavior has often been dismissed. For instance, the occurrence of extra-pair paternity in socially monogamous birds has mostly been analyzed in relation to male quality. However, very recent findings indicate that female extra-pair behavior will also depend on intrinsic female qualities, but virtually nothing is known about this issue. The aim of this project is to provide the first comprehensive analysis of individual variation in female fidelity, using quantitative genetics as well as experimental manipulation of conditional factors. The well-studied zebra finch (Taeniopygia guttata) offers unique system where a standardized testing procedure can be established that measures variation in sexual fidelity while controlling for the effects of male quality. Using this assay, I will test the following hypotheses:
(1) Some females are consistently more faithful to their partner than others (individual repeatability).
(2) These differences between individual females are partly due to genetic variation (test for mother-daughter resemblance) and partly due to environmental factors (test by manipulating female body condition). Within the requested fellowship I expect to gain all the know how required for conducting experimental work with zebra finches. Prof. Birkhead and his group at Sheffield University have extensive experience in keeping and breeding these birds, conducting mate-choice experiments, using laboratory techniques for paternity analysis as well as doing heritability studies in this species. Learning these techniques will be of great value to me as I intend to continue with this kind of work during later stages in my career. In general, I expect to profit greatly in terms of gained research experience, scientific output and personal contacts. The hosting research group will profit in terms of publications and representation at scientific meetings. The outlined project is highly promising for both parties involved, as we expect to learn what the sources of individual variation in female mating behaviour are, a fundamental question in sexual selection research, which has not been tackled before.

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Coordinatore

UNIVERSITY OF SHEFFIELD
Contributo UE
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Indirizzo
Western Bank
S10 2TN SHEFFIELD
Regno Unito

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