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Description
  • U altriciálních (nidikolních) ptáků je rozdělování krmiva rodiči ovlivněno žebravým chováním mláďat ve hnízdě. U rehka zahradního (Phoenicurus phoenicurus) byly analyzovány dva způsoby žebravého chování. Byl použit model soubojové konkurence s asymetrickou konkurencí mezi mláďaty ve hnízdě a model čestné signalizace. Otvírání zobáků i pozice v hnízdě byly ovlivněny stupněm hladu a byly v souladu s modelem „čestné signalizace“. Mláďata s těmito projevy byla častěji krmena. Změny umístění ve hnízdě byly pravděpodobně způsobeny méně hladovými mláďaty aktivně se přemisťujícími do zadních pozic. Nízká mortalita jednotlivých mláďat z jedné snůšky do doby opuštění hnízda a malé rozdíly mezi hmotností těchto mláďat naznačují nízký stupeň soupeření mezi nimi. Předpokládáme, že existují dva mechanismy chování, které přispívají k vyrovnávání hmotností do opeření: signalizace potřeby žebráním a pravidelné střídání mláďat na předních místech ve hnízdě. (cs)
  • Begging behaviour by the young affects parental food distribution among nestlings of altricial birds. We present an analysis of two types of begging behaviour in common redstart (Phoenicurus phoenicurus).The model of scramble competition with competitive asymmetries between nestlings or honest signalling model were used. Both gaping and nest positioning were affected by individual differences in nestling hunger and were in agreement with the honest signalling model. Those nestlings received food more often. Nestling movement seemed to be caused by the less hungry nestlings moving actively from front to rear positions. Low mortality of individual nestlings within broods that survived to fledging and small within-brood variation in fledging weights indicated low competition among nestmates. There are probably two behavioural mechanisms that contribute to the equalization of fledging weights: the signalling of need through gaping and the regular turnover of nestlings at front positions.
  • Begging behaviour by the young affects parental food distribution among nestlings of altricial birds. We present an analysis of two types of begging behaviour in common redstart (Phoenicurus phoenicurus).The model of scramble competition with competitive asymmetries between nestlings or honest signalling model were used. Both gaping and nest positioning were affected by individual differences in nestling hunger and were in agreement with the honest signalling model. Those nestlings received food more often. Nestling movement seemed to be caused by the less hungry nestlings moving actively from front to rear positions. Low mortality of individual nestlings within broods that survived to fledging and small within-brood variation in fledging weights indicated low competition among nestmates. There are probably two behavioural mechanisms that contribute to the equalization of fledging weights: the signalling of need through gaping and the regular turnover of nestlings at front positions. (en)
Title
  • Begging in common redstart nestlings: Scramble competition or signalling of need?
  • Begging in common redstart nestlings: Scramble competition or signalling of need? (en)
  • Žebrání mláďat rehka zahradního: soubojová konkurence nebo signalizace potřeby? (cs)
skos:prefLabel
  • Begging in common redstart nestlings: Scramble competition or signalling of need?
  • Begging in common redstart nestlings: Scramble competition or signalling of need? (en)
  • Žebrání mláďat rehka zahradního: soubojová konkurence nebo signalizace potřeby? (cs)
skos:notation
  • RIV/00027014:_____/06:#0000596!RIV08-MZE-00027014
http://linked.open.../vavai/riv/strany
  • 398-410
http://linked.open...avai/riv/aktivita
http://linked.open...avai/riv/aktivity
  • Z(MZE0002701402)
http://linked.open...iv/cisloPeriodika
  • 4
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
  • 466673
http://linked.open...ai/riv/idVysledku
  • RIV/00027014:_____/06:#0000596
http://linked.open...riv/jazykVysledku
http://linked.open.../riv/klicovaSlova
  • common redstart; nestlings; begging behaviour; feeding behaviour (en)
http://linked.open.../riv/klicoveSlovo
http://linked.open...odStatuVydavatele
  • DE - Spolková republika Německo
http://linked.open...ontrolniKodProRIV
  • [6C0931659F14]
http://linked.open...i/riv/nazevZdroje
  • Ethology
http://linked.open...in/vavai/riv/obor
http://linked.open...ichTvurcuVysledku
http://linked.open...cetTvurcuVysledku
http://linked.open...UplatneniVysledku
http://linked.open...v/svazekPeriodika
  • 112
http://linked.open...iv/tvurceVysledku
  • Špinka, Marek
  • Porkert, J.
http://linked.open...n/vavai/riv/zamer
issn
  • 0179-1613
number of pages
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