About: Do common whitethroats (Sylvia communis) discriminate against alien eggs?     Goto   Sponge   NotDistinct   Permalink

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  • In a coevolutionary arms race between a brood parasite and its host, both species are expected to evolve adaptations and counteradaptations, such as egg mimicry and egg discrimination. The Whitethroat (Sylvia communis) is a regular Cuckoo (Cuculus canorus) host in some parts of its breeding range. We studied egg discrimination in the Whitethroat in the SE part of the Czech Republic in an area where the Whitethroat is parasitised only occasionally. To investigate responses to parasitic eggs, in 34 nests either a non-mimetic or a mimetic egg was added. All 21 non-mimetic eggs were ejected. Of the 13 mimetic eggs, 7 were ejected and 6 eggs were accepted. No significant differences were found in intraclutch variation in egg appearance between acceptors and rejecters. Ejected mimetic eggs, however, showed greater contrast with host eggs than did the mimetic eggs that were accepted. Our experiments show that Whitethroats are persistent rejecters of alien eggs at the study site.
  • In a coevolutionary arms race between a brood parasite and its host, both species are expected to evolve adaptations and counteradaptations, such as egg mimicry and egg discrimination. The Whitethroat (Sylvia communis) is a regular Cuckoo (Cuculus canorus) host in some parts of its breeding range. We studied egg discrimination in the Whitethroat in the SE part of the Czech Republic in an area where the Whitethroat is parasitised only occasionally. To investigate responses to parasitic eggs, in 34 nests either a non-mimetic or a mimetic egg was added. All 21 non-mimetic eggs were ejected. Of the 13 mimetic eggs, 7 were ejected and 6 eggs were accepted. No significant differences were found in intraclutch variation in egg appearance between acceptors and rejecters. Ejected mimetic eggs, however, showed greater contrast with host eggs than did the mimetic eggs that were accepted. Our experiments show that Whitethroats are persistent rejecters of alien eggs at the study site. (en)
Title
  • Do common whitethroats (Sylvia communis) discriminate against alien eggs?
  • Do common whitethroats (Sylvia communis) discriminate against alien eggs? (en)
skos:prefLabel
  • Do common whitethroats (Sylvia communis) discriminate against alien eggs?
  • Do common whitethroats (Sylvia communis) discriminate against alien eggs? (en)
skos:notation
  • RIV/68081766:_____/03:67030059!RIV/2004/AV0/A67004/N
http://linked.open.../vavai/riv/strany
  • 354;363
http://linked.open...avai/riv/aktivita
http://linked.open...avai/riv/aktivity
  • P(GA206/00/P046), P(KSK6005114), Z(AV0Z6093917)
http://linked.open...iv/cisloPeriodika
  • 3
http://linked.open...vai/riv/dodaniDat
http://linked.open...aciTvurceVysledku
http://linked.open.../riv/druhVysledku
http://linked.open...iv/duvernostUdaju
http://linked.open...titaPredkladatele
http://linked.open...dnocenehoVysledku
  • 604256
http://linked.open...ai/riv/idVysledku
  • RIV/68081766:_____/03:67030059
http://linked.open...riv/jazykVysledku
http://linked.open.../riv/klicovaSlova
  • brood parasitism; Cuculus canorus; eggs (en)
http://linked.open.../riv/klicoveSlovo
http://linked.open...odStatuVydavatele
  • DE - Spolková republika Německo
http://linked.open...ontrolniKodProRIV
  • [C635B587846C]
http://linked.open...i/riv/nazevZdroje
  • Journal für Ornithologie
http://linked.open...in/vavai/riv/obor
http://linked.open...ichTvurcuVysledku
http://linked.open...cetTvurcuVysledku
http://linked.open...ocetUcastnikuAkce
http://linked.open...nichUcastnikuAkce
http://linked.open...vavai/riv/projekt
http://linked.open...UplatneniVysledku
http://linked.open...v/svazekPeriodika
  • 144
http://linked.open...iv/tvurceVysledku
  • Honza, Marcel
  • Procházka, Petr
http://linked.open...n/vavai/riv/zamer
issn
  • 0021-8375
number of pages
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