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Effects of ethanol storage and lipids on stable isotope values in a large mammalian omnivore
Javornik, Jernej (Avtor), Hopkins, John III (Avtor), Zavadlav, Saša (Avtor), Levanič, Tom (Avtor), Lojen, Sonja (Avtor), Polak, Tomaž (Avtor), Jerina, Klemen (Avtor)

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Izvleček
Ethanol storage and lipid extraction can alter the isotopic composition of animal tissues, which can bias dietary estimates calculated by stable isotope mixing models (SIMMs). We examined the effects of ethanol storage and lipid extraction on [delta]13C, [delta]15N, and [delta]34S values measured in brown bear (Ursus arctos) muscles and livers. We also used isotopic data from our experiment to understand the effect of ethanol storage and lipid extraction on dietary contributions calculated by SIMMs. We found that ethanol storage and lipid extraction caused small increases in [delta]13C values for both muscles (ethanol storage: +0.4 - 0.5 prom., lipid extraction: +0.4 - 0.4 prom.) and liver (ethanol storage: +0.6 - 0.3prom., lipid extraction: +0.8 - 0.5 prom.). In contrast, [delta]15N and [delta]34S values did not change when stored in ethanol or when lipids were extracted from tissues. Ethanol storage and lipid extraction had negligible effects on estimated dietary contributions. We show that a relatively high lipid content in the muscles and livers of some large-bodied terrestrial omnivores do not necessarily have an effect on dietary estimates that rely on carbon stable isotopes. Our results suggest that ethanol storage could be a valuable alternative method for preserving animal tissue prior to stable isotope analysis when freezing or drying is impractical. Nevertheless, further research is needed on the mechanisms that control changes in stable isotope composition in tissues stored in ethanol. We recommend investigating the effects of ethanol on stable isotope values in species and tissues of interest before storing samples in ethanol.

Jezik:Angleški jezik
Ključne besede:lipid extraction, sample preservation, sulfur stable isotopes, Ursus arctos
Vrsta gradiva:Delo ni kategorizirano (r6)
Tipologija:1.01 - Izvirni znanstveni članek
Organizacija:BF - Biotehniška fakulteta
Leto izida:2019
UDK:630*15(045)=111
ISSN pri članku:0022-2372
DOI:10.1093/jmammal/gyy187 Povezava se odpre v novem oknu
COBISS.SI-ID:5301926 Povezava se odpre v novem oknu
Število ogledov:125
Število prenosov:0
Metapodatki:XML RDF-CHPDL DC-XML DC-RDF
 
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Gradivo je financirano iz projekta

Financer:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije (ARRS)
Številka projekta:J4-7362
Naslov:Razvoj sodobnih metodoloških pristopov za preučevanje vedenja prostoživečih živali: raziskave nastanka problematičnih medvedov v kontrastnih okoljih Evrope

Sekundarni jezik

Jezik:Slovenski jezik
Ključne besede:ekstrakcija lipidov, shranjevanje vzorcev, stabilni izotopi žvepla, Ursus arctos, varstvo narave, rjavi medved, upravljanje z divjadjo, zveri

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