Eggshell spotting does not predict male incubation but marks thinner areas of a shorebird?s shells

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60460709%3A41330%2F12%3A54984" target="_blank" >RIV/60460709:41330/12:54984 - isvavai.cz</a>

Výsledek na webu

—

DOI - Digital Object Identifier

—

Jazyk výsledku

angličtina

Název v původním jazyce

Eggshell spotting does not predict male incubation but marks thinner areas of a shorebird?s shells

Popis výsledku v původním jazyce

Many birds lay eggs speckled with protoporphyrin pigment, but the function of these spots is debated. Two hypotheses have received considerable attention. Under the 'signaling-function hypothesis' speckling reflects female quality and influences male parental-care; under the 'structural-function hypothesis' the speckles strengthen the eggshell when calcium is scarce. We tested the predictions in a biparentally-incubating ground-nesting shorebird, in which direct male response to eggshell-speckling exists. The speckling-parameters were repeatable within lapwing clutches, a requirement for a sexually-selected signal, but we found no relationship between male incubation, and speckling. The spots were associated with thinner areas of eggshell, which strongly supports the suggestion of a structural (strengthening) function. Our results extend the 'structural-function hypothesis' to other avian taxa and suggest that more than one significant function can drive the evolution of avian eggshell

Název v anglickém jazyce

Eggshell spotting does not predict male incubation but marks thinner areas of a shorebird?s shells

Popis výsledku anglicky

Many birds lay eggs speckled with protoporphyrin pigment, but the function of these spots is debated. Two hypotheses have received considerable attention. Under the 'signaling-function hypothesis' speckling reflects female quality and influences male parental-care; under the 'structural-function hypothesis' the speckles strengthen the eggshell when calcium is scarce. We tested the predictions in a biparentally-incubating ground-nesting shorebird, in which direct male response to eggshell-speckling exists. The speckling-parameters were repeatable within lapwing clutches, a requirement for a sexually-selected signal, but we found no relationship between male incubation, and speckling. The spots were associated with thinner areas of eggshell, which strongly supports the suggestion of a structural (strengthening) function. Our results extend the 'structural-function hypothesis' to other avian taxa and suggest that more than one significant function can drive the evolution of avian eggshell

Druh

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

CEP obor

EG - Zoologie

OECD FORD obor

—

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2012

Kód důvěrnosti údajů

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

Název periodika

AUK

ISSN

0004-8038

e-ISSN

—

Svazek periodika

129

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

10

Strana od-do

26-35

Kód UT WoS článku

000301470800004

EID výsledku v databázi Scopus

—