Possible implications of stable isotope analysis in wild boar management: stable carbon and nitrogen isotope discrimination factors from diet to hair

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60460709%3A41320%2F14%3AN0000008" target="_blank" >RIV/60460709:41320/14:N0000008 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Possible implications of stable isotope analysis in wild boar management: stable carbon and nitrogen isotope discrimination factors from diet to hair

Popis výsledku v původním jazyce

Stable isotope analyses have become a widespread tool for studying the nutritional ecology of wildlife. Stable carbon (13C/12C) and nitrogen (15N/14N) isotope ratios can be used to gain important insights into the trophic relationships between organisms as well as habitat use and origin of diet for many wildlife species. Stable isotope ratios in animal tissues reflect those of their diet. However, isotope values of animal tissues and their diets differ due to a phenomenon known as a trophic discrimination factor, which needs to be taken into account while reconstructing diet of animals by stable isotope analysis. This trophic discrimination is the result of many processes and varies with respect to many factors, including the studied species, differential digestibility, type of tissue analysed, growth rate and tissue turnover rate. Dietary inferences based on stable isotope analysis of tissues of wild animals are often hampered because values for discrimination factors are only assumed and not experimentally derived resulting in inaccurate estimates of animal diets. It is thus important to experimentally determine discrimination factors under controlled conditions in order to get accurate and reliable information on diets of wild animals. Here we determined stable carbon and nitrogen isotope discrimination factors in hair of four 3-year old captive wild boar (Sus scrofa) fed with a constant diet (corn, Zea mays) over a 4-month period. Also, the growth rate (mm/day) of wild boar hair was calculated. These results allow more accurate interpretation of field data and can be used for dietary reconstructions of free-ranging wild boar. Possible implications of stable carbon and nitrogen isotope analyses in wild boar management and feeding ecology will be discussed.

Název v anglickém jazyce

Possible implications of stable isotope analysis in wild boar management: stable carbon and nitrogen isotope discrimination factors from diet to hair

Popis výsledku anglicky

Stable isotope analyses have become a widespread tool for studying the nutritional ecology of wildlife. Stable carbon (13C/12C) and nitrogen (15N/14N) isotope ratios can be used to gain important insights into the trophic relationships between organisms as well as habitat use and origin of diet for many wildlife species. Stable isotope ratios in animal tissues reflect those of their diet. However, isotope values of animal tissues and their diets differ due to a phenomenon known as a trophic discrimination factor, which needs to be taken into account while reconstructing diet of animals by stable isotope analysis. This trophic discrimination is the result of many processes and varies with respect to many factors, including the studied species, differential digestibility, type of tissue analysed, growth rate and tissue turnover rate. Dietary inferences based on stable isotope analysis of tissues of wild animals are often hampered because values for discrimination factors are only assumed and not experimentally derived resulting in inaccurate estimates of animal diets. It is thus important to experimentally determine discrimination factors under controlled conditions in order to get accurate and reliable information on diets of wild animals. Here we determined stable carbon and nitrogen isotope discrimination factors in hair of four 3-year old captive wild boar (Sus scrofa) fed with a constant diet (corn, Zea mays) over a 4-month period. Also, the growth rate (mm/day) of wild boar hair was calculated. These results allow more accurate interpretation of field data and can be used for dietary reconstructions of free-ranging wild boar. Possible implications of stable carbon and nitrogen isotope analyses in wild boar management and feeding ecology will be discussed.

Druh

O - Ostatní výsledky

CEP obor

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OECD FORD obor

40102 - Forestry

Projekt

<a href="/cs/project/QJ1220314" target="_blank" >QJ1220314: Harmonizace managementu populací zvěře a lesních ekosystémů v kontextu očekávaných klimatických změn a minimalizace škod na lesních porostech</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2014

Kód důvěrnosti údajů

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