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Individual female common cuckoos Cuculus canorus lay constant egg types but egg appearance cannot be used to assign eggs to females

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081766%3A_____%2F08%3A00309451" target="_blank" >RIV/68081766:_____/08:00309451 - isvavai.cz</a>

  • Result on the web

  • DOI - Digital Object Identifier

Alternative languages

  • Result language

    angličtina

  • Original language name

    Individual female common cuckoos Cuculus canorus lay constant egg types but egg appearance cannot be used to assign eggs to females

  • Original language description

    Females of the obligate brood parasitic common cuckoo Cuculus canorus are assumed to lay eggs of consistent colour and pattern and egg characteristics have been used to separate between different individuals. We tested the "constant egg-type hypothesis"in blind tests using test persons who grouped cuckoo eggs into "potential clutches" based on similarity in appearance. A correct classification of eggs laid by known (radiotagged) females supported the hypothesis. However, comparisons between maternity based on visual assessments and DNA-based parentage analyses revealed rather poor concordance between the two methods. Our findings indicate that egg characteristics cannot be used to separate between cuckoo females, even if they lay eggs with constant appearance. The reason is probably that there are only small or negligible variations in egg appearance between some females like mothers and daughters or other closely related individuals.

  • Czech name

    Samice kukaček kladou vejce konstantního typu, ale ten nemůže být použit k přiřazování k jednotlivým samicím

  • Czech description

    Samice obligátních hnízdních parasitů kladou vejce konsistentní v barvě a skvrnění a tyto charakteristiky jsou využívány k odlišení jednotlivých individuií. Byla testována "constant egg-type hypothesis" pomocí hodnocení fotografií, které byly přiřazoványk jednotlivým samicím. Tento výsledek byl konfrontován s radiotelemetricky označenými samicemi a s analýzami DNA rodičů. Bylo prokázáno, že charateristiky vejce nemohou být použity k odlišení jednotlivých samic, i když snášejí vejce konstantního typu.

Classification

  • Type

    J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

  • CEP classification

    EG - Zoology

  • OECD FORD branch

Result continuities

  • Project

  • Continuities

    Z - Vyzkumny zamer (s odkazem do CEZ)

Others

  • Publication year

    2008

  • 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 avian biology

  • ISSN

    0908-8857

  • e-ISSN

  • Volume of the periodical

    39

  • Issue of the periodical within the volume

    2

  • Country of publishing house

    DK - DENMARK

  • Number of pages

    4

  • Pages from-to

  • UT code for WoS article

    000253759300018

  • EID of the result in the Scopus database