Brood parasite and host eggshells undergo similar levels of decalcification during embryonic development
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Tartalom: http://real.mtak.hu/74045/
Archívum: MTA Könyvtár
Gyűjtemény: Status = Published

Type = Article
Cím:
Brood parasite and host eggshells undergo similar levels of decalcification during embryonic development
Létrehozó:
Igic, Branislav
Hauber, Mark E.
Moskát, Csaba
Grim, Tomas
Shawkey, Matthew D.
Procházka, Petr
Honza, Marcel
Kiadó:
Wiley-Blackwell
Dátum:
2017
Téma:
QH540 Ecology / ökológia
QL Zoology / állattan
Tartalmi leírás:
Common cuckoos (Cuculus canorus) are obligate brood parasites that lay their eggs in the nests of other (host) species. To increase the likelihood of successful parasitism, common cuckoos lay eggs with thicker and structurally stronger eggshells than those of their hosts and non-parasitic relatives. Although hatching from thicker eggshells requires greater effort and may impose physiological costs on cuckoo embryos during hatching, it is unclear whether cuckoo eggshells are indeed thicker at the time of hatching. This is because avian embryos decalcify the innermost eggshell layer (mammillary layer) for organ development during embryogenesis, reducing eggshell thickness and making hatching easier. Therefore, common cuckoo eggshells may undergo a greater degree of decalcification during embryonic development to facilitate hatching from an initially thicker-shelled egg. We used scanning electron microscopy to test this hypothesis by comparing the thickness and degree of decalcification of eggshells collected either before incubation or after hatching. We found that cuckoo eggshells undergo similar degrees of decalcification during embryonic development as the thinner eggshells of a host that lays similarly sized eggs, the great reed warbler (Acrocephalus arundinaceus). Cuckoo eggshells hence remain thicker than eggshells of this host throughout embryogenesis, supporting the predicted trade-off between the benefits of laying puncture resistant eggs and the physiological costs associated with hatching.
Nyelv:
angol
Típus:
Article
PeerReviewed
info:eu-repo/semantics/article
Formátum:
text
Azonosító:
Igic, Branislav and Hauber, Mark E. and Moskát, Csaba and Grim, Tomas and Shawkey, Matthew D. and Procházka, Petr and Honza, Marcel (2017) Brood parasite and host eggshells undergo similar levels of decalcification during embryonic development. JOURNAL OF ZOOLOGY, 301 (3). pp. 165-173. ISSN 0952-8369
Kapcsolat:
https://doi.org/10.1111/jzo.12408
doi: 10.1111/jzo.12408