Composition and Scaling of Male and Female Alpine Newt (Mesotriton Alpestris) Prey, with Related Site and Seasonal Effects

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60460709%3A41330%2F12%3A55393" target="_blank" >RIV/60460709:41330/12:55393 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/60460709:41210/12:55393

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Composition and Scaling of Male and Female Alpine Newt (Mesotriton Alpestris) Prey, with Related Site and Seasonal Effects

Popis výsledku v původním jazyce

In amphibians, most species are female-biased sexually dimorphic and such dimorphism is often accompanied by intersexual differences in prey composition. While many aspects of foraging ecology have been studied in this group, intersexual differences haverarely been described. We examined dietary composition of male and female Alpine Newts (Mesotriton alpestris) at two localities in the Czech Republic during the entire breeding period by stomach flushing. Isopoda, Cladocera, Rana eggs were the most important prey. About 16% of newts did not contain prey items. Females were at studied localities about 15% larger than males. Snout-vent length (SVL) of newts was related to the mass of consumed prey, but not its number and diversity. Analyzing the residuals from the relationships between SVL and prey characteristics, we found effect of sex on all observed prey variables ? females consumed more prey items, more diverse prey and also prey in greater mass than did males.

Název v anglickém jazyce

Composition and Scaling of Male and Female Alpine Newt (Mesotriton Alpestris) Prey, with Related Site and Seasonal Effects

Popis výsledku anglicky

In amphibians, most species are female-biased sexually dimorphic and such dimorphism is often accompanied by intersexual differences in prey composition. While many aspects of foraging ecology have been studied in this group, intersexual differences haverarely been described. We examined dietary composition of male and female Alpine Newts (Mesotriton alpestris) at two localities in the Czech Republic during the entire breeding period by stomach flushing. Isopoda, Cladocera, Rana eggs were the most important prey. About 16% of newts did not contain prey items. Females were at studied localities about 15% larger than males. Snout-vent length (SVL) of newts was related to the mass of consumed prey, but not its number and diversity. Analyzing the residuals from the relationships between SVL and prey characteristics, we found effect of sex on all observed prey variables ? females consumed more prey items, more diverse prey and also prey in greater mass than did males.

Druh

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

CEP obor

EG - Zoologie

OECD FORD obor

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Projekt

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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

ANNALES ZOOLOGICI FENNICI

ISSN

0003-455X

e-ISSN

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Svazek periodika

2012

Číslo periodika v rámci svazku

49

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

9

Strana od-do

231-239

Kód UT WoS článku

000307916700003

EID výsledku v databázi Scopus

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