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Growth strategies of passerine birds are related to brood parasitism by the brown-headed cowbird (Molothrus ater)

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F06%3A00002656" target="_blank" >RIV/61989592:15310/06:00002656 - isvavai.cz</a>

  • Result on the web

  • DOI - Digital Object Identifier

Alternative languages

  • Result language

    angličtina

  • Original language name

    Growth strategies of passerine birds are related to brood parasitism by the brown-headed cowbird (Molothrus ater)

  • Original language description

    Sibling competition was proposed as an important selective agent in the evolution of growth and development. Brood parasitism by the brown-headed cowbird (Molothrus ater) intensifies sibling competition in the nests of its hosts by increasing host chickmortality and exposing them to a genetically unrelated nestmate. Intranest sibling competition for resources supplied by parents is size dependent. Thus, it should select for high development rates and short nestling periods, which would alleviate negative impacts of brood parasitic chicks on host young. I tested these predictions on 134 North American passerines by comparative analyses. After controlling for covariates and phylogeny, I showed that high parasitism rate was associated with higher nestling growth rate, lower mass at fledging, and shorter nestling periods. These effects were most pronounced in species in which sibling competition is most intense (i.e., weighing over about 30 g). When species were categorized as nonhosts ve

  • Czech name

    Růstové strategie pěvců závisí na hnízdním parasitismu vlhovcem hnědohlavým (Mohothrus ater)

  • Czech description

    Konkurence mezi mláďaty by měla ovlivňovat růstové strategie ptáků. Hnízdní parazitismus vede k větší konkurenci mezi mláďaty a tak by měl vést i k větší rychlosti růstu a k evoluční odpovědi v dalších znacích. Tuto hypotézu jsem testoval na 134 druzíchseveroamerických pěvců parazitovaných vlhovcem hnědohlavým. Ukázalo se, že vysoce parazitované druhy skutečně rostou rychleji, opouštějí hnízdo dříve a v menší tělesné hmotnosti, platí to však pouze u druhů vážících více než 30g. Navíc se ukázalo, že evoluci růstových strategií ovlivňuje délka koevoluce hostitele s parazitem.

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

    <a href="/en/project/GP206%2F05%2FP581" target="_blank" >GP206/05/P581: Ecology and evolution of growth and development in birds: a comparative approach applied on the model group of passerines</a><br>

  • Continuities

    Z - Vyzkumny zamer (s odkazem do CEZ)

Others

  • Publication year

    2006

  • Confidentiality

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

Data specific for result type

  • Name of the periodical

    Evolution

  • ISSN

    0014-3820

  • e-ISSN

  • Volume of the periodical

    60

  • Issue of the periodical within the volume

    8

  • Country of publishing house

    US - UNITED STATES

  • Number of pages

    9

  • Pages from-to

    1692-1700

  • UT code for WoS article

  • EID of the result in the Scopus database