Proč u poláka velkého neexistuje korelace mezi velikostí vejce a počtem vajec?

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081766%3A_____%2F08%3A00306971" target="_blank" >RIV/68081766:_____/08:00306971 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11310/08:13682 RIV/00023272:_____/08:#0000521 RIV/00216208:11310/08:13545

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Why there is no negative correlation between egg size and number in the Common Pochard?

Popis výsledku v původním jazyce

Trade-off between offspring size and number belongs to the most discussed concepts in the life history theory. Although it has been frequently described at interspecific level as a negative correlation between egg size and number, it is usually difficultto provide similar evidence at a population level. We did not find any evidence for negative correlation between estimated egg mass and clutch size in the Common Pochard (Aythya ferina). However, the predicted negative relationship appeared after incubation when young with many siblings were on average lighter than conspecifics in nests with fewer young. Such a pattern might be generated by differences in hatching success and energy consumption by developing embryos among particular nests. Our data indicate that females which had laid clutches containing many big eggs lost a much larger amount of energy invested and, moreover, produced hatchlings of relatively lower body mass if compared with females having few small eggs.

Název v anglickém jazyce

Why there is no negative correlation between egg size and number in the Common Pochard?

Popis výsledku anglicky

Trade-off between offspring size and number belongs to the most discussed concepts in the life history theory. Although it has been frequently described at interspecific level as a negative correlation between egg size and number, it is usually difficultto provide similar evidence at a population level. We did not find any evidence for negative correlation between estimated egg mass and clutch size in the Common Pochard (Aythya ferina). However, the predicted negative relationship appeared after incubation when young with many siblings were on average lighter than conspecifics in nests with fewer young. Such a pattern might be generated by differences in hatching success and energy consumption by developing embryos among particular nests. Our data indicate that females which had laid clutches containing many big eggs lost a much larger amount of energy invested and, moreover, produced hatchlings of relatively lower body mass if compared with females having few small eggs.

Druh

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

CEP obor

EG - Zoologie

OECD FORD obor

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Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2008

Kód důvěrnosti údajů

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

Název periodika

Acta Oecologica-International Journal of Ecology

ISSN

1146-609X

e-ISSN

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Svazek periodika

33

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

FR - Francouzská republika

Počet stran výsledku

6

Strana od-do

197-202

Kód UT WoS článku

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EID výsledku v databázi Scopus

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