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Sex-specific nestling growth in an obligate brood parasite: Common Cuckoo males grow larger than females

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60076658%3A12310%2F18%3A43897753" target="_blank" >RIV/60076658:12310/18:43897753 - isvavai.cz</a>

  • Alternative codes found

    RIV/68081766:_____/18:00493161

  • Result on the web

    <a href="https://bioone.org/journals/the-auk/volume-135/issue-4/AUK-18-26.1/Sex-specific-nestling-growth-in-an-obligate-brood-parasite/10.1642/AUK-18-26.1.full" target="_blank" >https://bioone.org/journals/the-auk/volume-135/issue-4/AUK-18-26.1/Sex-specific-nestling-growth-in-an-obligate-brood-parasite/10.1642/AUK-18-26.1.full</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.1642/AUK-18-26.1" target="_blank" >10.1642/AUK-18-26.1</a>

Alternative languages

  • Result language

    angličtina

  • Original language name

    Sex-specific nestling growth in an obligate brood parasite: Common Cuckoo males grow larger than females

  • Original language description

    Growth is a key life history trait that is closely related to individual fitness. In altricial birds, growth is restricted to a relatively short period, and depends primarily on the amount or quality of food and hence on parental care. Obligate brood parasites do not care for their own offspring but impose this burden on other species (hosts). As many brood parasites exploit various host species, their progeny are expected to receive different levels of parental care. Parasite growth has thus often been explored in the context of host parenting abilities and only rarely with respect to its sex specificity. Here, we fill this gap in knowledge and explore sex differences in the growth of Common Cuckoo (Cuculus canorus) nestlings reared by 2 warbler hosts in the genus Acrocephalus. As adult Common Cuckoo males are 5-16% heavier than females, we assumed that nestlings would also differ in size and thus in growth performance. To test this assumption, we used a nonlinear mixed effects modeling approach to fit an overall logistic curve across all nestling masses and ages. We chose the logistic growth model over its alternatives because it is one of the most used models for birds and it is suitable for the growth of Common Cuckoo nestlings. We found that both sexes exhibited similar mass after hatching and grew at a similar rate. Nevertheless, males reached similar to 10% higher asymptotic mass than females, while fledging at a similar age as females. These findings imply that male Common Cuckoo nestlings may have higher needs than female nestlings; however, this still awaits proper testing.

  • 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

    10615 - Ornithology

Result continuities

  • Project

    <a href="/en/project/GA17-12262S" target="_blank" >GA17-12262S: Reproductive strategies of an obligate brood parasite: host selection, offspring sex allocation and individual success</a><br>

  • Continuities

    I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Others

  • Publication year

    2018

  • Confidentiality

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

Data specific for result type

  • Name of the periodical

    Auk

  • ISSN

    0004-8038

  • e-ISSN

  • Volume of the periodical

    135

  • Issue of the periodical within the volume

    4

  • Country of publishing house

    US - UNITED STATES

  • Number of pages

    10

  • Pages from-to

    1033-1042

  • UT code for WoS article

    000446824400017

  • EID of the result in the Scopus database

    2-s2.0-85052635083