Alternative mechanisms of increased eggshell hardness of avian brood parasites relative to host species

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F11%3A33119825" target="_blank" >RIV/61989592:15310/11:33119825 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1098/rsif.2011.0207" target="_blank" >http://dx.doi.org/10.1098/rsif.2011.0207</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1098/rsif.2011.0207" target="_blank" >10.1098/rsif.2011.0207</a>

Result language
angličtina
Original language name
Alternative mechanisms of increased eggshell hardness of avian brood parasites relative to host species
Original language description
Obligate brood parasitic birds lay their eggs in nests of other species and parasite eggs typically have evolved greater structural strength relative to host eggs. Increased mechanical strength of the parasite eggshell is an adaptation that can interferewith puncture ejection behaviours of discriminating hosts. We investigated whether hardness of eggshells is related to differences between physical and chemical traits from three different races of the parasitic common cuckoo Cuculus canorus, and theirrespective hosts. Using tools developed for materials science, we discovered a novel correlate of increased strength of parasite eggs: the common cuckoo's egg exhibits a greater microhardness, especially in the inner region of the shell matrix, relativeto its host and sympatric non-host species. We then tested predictions of four potential mechanisms of shell strength: (i) increased relative thickness overall, (ii) greater proportion of the structurally harder shell layers, (iii) higher
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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Project
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Continuities
Z - Vyzkumny zamer (s odkazem do CEZ)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2011
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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