Žebrání mláďat rehka zahradního: soubojová konkurence nebo signalizace potřeby?

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00027014%3A_____%2F06%3A%230000596" target="_blank" >RIV/00027014:_____/06:#0000596 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Begging in common redstart nestlings: Scramble competition or signalling of need?

Popis výsledku v původním jazyce

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 competitiveasymmetries 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.

Název v anglickém jazyce

Begging in common redstart nestlings: Scramble competition or signalling of need?

Popis výsledku anglicky

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 competitiveasymmetries 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.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

GG - Chov hospodářských zvířat

OECD FORD obor

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Projekt

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Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2006

Kód důvěrnosti údajů

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

Název periodika

Ethology

ISSN

0179-1613

e-ISSN

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Svazek periodika

112

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

13

Strana od-do

398-410

Kód UT WoS článku

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EID výsledku v databázi Scopus

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