Eggshell spotting does not predict male incubation but marks thinner areas of a shorebird?s shells

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60460709%3A41330%2F12%3A54984" target="_blank" >RIV/60460709:41330/12:54984 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Eggshell spotting does not predict male incubation but marks thinner areas of a shorebird?s shells
Original language description
Many birds lay eggs speckled with protoporphyrin pigment, but the function of these spots is debated. Two hypotheses have received considerable attention. Under the 'signaling-function hypothesis' speckling reflects female quality and influences male parental-care; under the 'structural-function hypothesis' the speckles strengthen the eggshell when calcium is scarce. We tested the predictions in a biparentally-incubating ground-nesting shorebird, in which direct male response to eggshell-speckling exists. The speckling-parameters were repeatable within lapwing clutches, a requirement for a sexually-selected signal, but we found no relationship between male incubation, and speckling. The spots were associated with thinner areas of eggshell, which strongly supports the suggestion of a structural (strengthening) function. Our results extend the 'structural-function hypothesis' to other avian taxa and suggest that more than one significant function can drive the evolution of avian eggshell
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
EG - Zoology
OECD FORD branch
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Publication year
2012
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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