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

Result code in 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>
Alternative codes found
RIV/60460709:41210/12:55393
Result on the web
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DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Composition and Scaling of Male and Female Alpine Newt (Mesotriton Alpestris) Prey, with Related Site and Seasonal Effects
Original language description
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.
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
EG - Zoology
OECD FORD branch
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Publication year
2012
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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