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Kate E. Plummer, Stuart Bearhop, David I. Leech, Dan E. Chamberlain and Jonathan D. Blount Fat provisioning in winter impairs egg production during the following spring: a landscape-scale study of blue tits Journal of Animal Ecology 82

Version of Record online: 5 FEB 2013 | DOI: 10.1111/1365-2656.12025

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Provisioning of food to wild birds is widespread but its ecological impacts are poorly understood. The authors show that winter provisioning with fat results in smaller relative yolk mass and reduced yolk carotenoid concentrations in early breeders, while these effects are not seen in birds provisioned with fat-plus-vitamin E. The results highlight how the ecological impacts of provisioning can depend on the nutritional profile of foods.

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