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How strong are eggs of the common cuckoo Cuculus canorus?

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081766%3A_____%2F21%3A00536905" target="_blank" >RIV/68081766:_____/21:00536905 - isvavai.cz</a>

  • Result on the web

    <a href="https://bioone.org/journalArticle/Download?fullDOI=10.25225%2Fjvb.20109" target="_blank" >https://bioone.org/journalArticle/Download?fullDOI=10.25225%2Fjvb.20109</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.25225/jvb.20109" target="_blank" >10.25225/jvb.20109</a>

Alternative languages

  • Result language

    angličtina

  • Original language name

    How strong are eggs of the common cuckoo Cuculus canorus?

  • Original language description

    The common cuckoo Cuculus canorus is an obligate brood parasite that lays its eggs in the nests of small passerines. It has long been hypothesized that cuckoo eggs should be structurally stronger than host eggs or those of non-parasitic cuckoos to reduce chances of breakage during laying, to prevent accidental damage during incubation and/or to hinder their rejection through puncture ejection by the host. Therefore, we analysed selected characteristics of a sample of freshly laid eggs of the common cuckoo with two of its major hosts, the reed warbler Acrocephalus scirpaceus and great reed warbler Acrocephalus arundinaceus, and a sample of species with known puncture resistant eggs. We found that in puncture resistance tests cuckoo eggs tolerated on average 231 g. The cuckoo eggs were 3.3 and 2.5 times stronger than those of the reed warbler and great reed warbler, respectively. Greater shell thickness can explain only 17% of the total extra strength of the cuckoo eggs (125.97 g). When we controlled for the confounding effects of egg size (using a sample of eggs of normal strength from bird species of varying size), the common cuckoo eggs were 2.2 times stronger than expected for their size. Our results are consistent with the hypothesis that cuckoo eggs are structurally stronger and this trait probably represents an adaptation for a brood parasitic life style.

  • Czech name

  • Czech description

Classification

  • Type

    J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database

  • CEP classification

  • OECD FORD branch

    10613 - Zoology

Result continuities

  • Project

  • Continuities

    I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Others

  • Publication year

    2021

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Name of the periodical

    Journal of Vertebrate Biology

  • ISSN

    2694-7684

  • e-ISSN

    2694-7684

  • Volume of the periodical

    70

  • Issue of the periodical within the volume

    1

  • Country of publishing house

    CZ - CZECH REPUBLIC

  • Number of pages

    7

  • Pages from-to

    20109

  • UT code for WoS article

    000605650700002

  • EID of the result in the Scopus database

    2-s2.0-85115154903