Parental care in relation to offspring sex and mate attractiveness in the Blue Tit

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The aim of this thesis is to determine whether differential allocation, sex biased care or differential sex-biased care occurs in blue tits. By videotaping feeding rates of blue tits and by determining the sex of offspring using molecular techniques, we can measure the amount of parental care by male and female blue tits in each sex of offspring. By measuring the UV-colouration of the parents, we are able to determine how much is invested in the total brood and in each offspring sex in relation to parental attractiveness.

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