Počet záznamů: 1
A new method for assessing food quality in common vole (Microtus arvalis) populations
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SYSNO ASEP 0436834 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název A new method for assessing food quality in common vole (Microtus arvalis) populations Tvůrce(i) Jánová, Eva (UBO-W) RID
Bryja, Josef (UBO-W) RID, SAI, ORCID
Čižmár, D. (CZ)
Čepelka, L. (CZ)
Heroldová, Marta (UBO-W) RID, ORCIDCelkový počet autorů 5 Zdroj.dok. European Journal of Wildlife Research. - : Springer - ISSN 1612-4642
Roč. 61, č. 1 (2015), s. 57-62Poč.str. 6 s. Jazyk dok. eng - angličtina Země vyd. DE - Německo Klíč. slova NIRS ; Nitrogen ; Rodent ; Food quality ; Food supply Vědní obor RIV EG - Zoologie CEP GP521/08/P529 GA ČR - Grantová agentura ČR Institucionální podpora UBO-W - RVO:68081766 UT WOS 000348219700006 EID SCOPUS 84922005275 DOI 10.1007/s10344-014-0873-5 Anotace Food quality is an important factor influencing the demography of small rodents. While there have been numerous studies on food supply during small mammal population cycles, studies on quality of food consumed are rare due to technical difficulties in estimating nitrogen in small samples, such as stomachs or faeces. In this study, we use a new method, near infrared reflectance spectroscopy (NIRS), for estimating nitrogenous compounds (NC) in stomachs of common voles (Microtus arvalis). Samples were taken from two populations over two 3-year periods. Vegetation cover (managed alfalfa/set-aside field), and thus also food supply, differed significantly between the two periods. In analysing the effects of food supply and individual attributes (i.e. sex, body size, reproduction) on NC in stomachs, we were able to show that nitrogen varied uniformly and that sex, body size and season had no effect. No significant difference in NC intake was observed between the two study periods, despite individuals being smaller and the population less abundant during the second period. During the peak densities, however, reproducing females consumed food with a significantly higher level of nitrogen than all other individuals. Our results indicate that changes in food supply do not affect the overall quality of food consumed but that maintenance of nutritional quality may require higher energetic release, which may affect body condition. We confirm that NIRS represents a useful new tool opening new possibilities in small-mammal ecology studies. Pracoviště Ústav biologie obratlovců Kontakt Hana Slabáková, slabakova@ivb.cz, Tel.: 543 422 524 Rok sběru 2016
Počet záznamů: 1