Skrivanje plena pri evrazijskem risu (Lynx lynx) v Sloveniji

Hočevar, Maj (author), Krofel, Miha (mentor)

Evrazijski ris (Lynx lynx) pogosto skriva svoj plen, saj ga s tem zaščiti pred drugimi živalmi. S to raziskavo smo ugotavljali, kateri dejavniki vplivajo na pogostost skrivanja plena pri risu. Podatki so bili zbrani na območju Slovenije, in sicer v Dinaridih ter Alpah. Izvajali smo sistematično popisovanje plenov ter beleženje določenih parametrov, vključno z znaki skrivanja plena. Skupno smo analizirali 452 plenov, od tega smo lahko pri 330 primerih ugotovili, ali so bili skriti ali ne. Skritih je bilo 162 plenov, pri ostalih 168 plenov pa nismo opazili znakov, da bi jih risi poskušali skriti. Risi so plen pogosteje skrivali izven dobe olistanja (48,5 %), kot v dobi olistanja (26,0 %). Skrivanje plena je bilo bolj pogosto pri samicah (60,9 %) kot samcih (41,2 %). Statistična analiza je pokazala, da masa plena in sestojni sklep nista imeli večjega vpliva na risovo skrivanje plena. Gostote medvedov tudi niso bile potrjene kot pomemben dejavnik. Skrivanje plena je pripomoglo k zmanjšanju obiska ptičjih mrhovinarjev, saj so ti bistveno redkeje obiskovali skrite plene v primerjavi z ne skritimi. Na podlagi tega sklepamo, da se je skrivanje plena pri risu razvilo predvsem kot obramba pred kleptoparazitizmom s strani ptičjih mrhovinarjev. Dobljeni rezultati nam pomagajo pri boljšem razumevanju vedenjskih lastnosti risa pri prehranjevanju s svojim plenom in kako to vpliva na medvrstne odnose.

• Language: Slovenian
• Keywords: Evrazijski ris, Lynx lynx, skrivanje plena, kleptoparazitizem, plenilstvo
• Work type: Bachelor thesis/paper
• Typology: 2.11 - Undergraduate Thesis
• Organization: BF - Biotechnical Faculty
• Publisher: [M. Hočevar]
• Year: 2025
• PID: 20.500.12556/RUL-168734
• UDC: 630*1(043.2)=163.6
• COBISS.SI-ID: 233459715
• Publication date in RUL: 22.04.2025

HOČEVAR, Maj, 2025, Skrivanje plena pri evrazijskem risu (Lynx lynx) v Sloveniji [online]. Bachelor’s thesis. M. Hočevar. [Accessed 17 May 2025]. Retrieved from: https://repozitorij.uni-lj.si/IzpisGradiva.php?lang=eng&id=168734

Secondary language

• Language: English
• Title: Prey caching by Eurasian lynx (Lynx lynx) in Slovenia

Abstract

The Eurasian lynx (Lynx lynx) often cover its prey to protect it from being scavenged by other animals. In this study, we investigated the factors influencing lynx prey caching behavior. Data was collected in the Dinaric mountains and the Alps in Slovenia, through systematic monitoring of lynx kills and recording of specific parameters at the kill sites, including the signs of covering prey. A total of 452 kills were analyzed, and for 330 of them, we were able to determine whether the prey was covered by a lynx or not. Out of these, 162 kills were covered, while 168 were not covered. Lynx cached their prey more frequently outside the vegetation season (48.5%) than during vegetation season (26,0%). Females were more often exhibiting caching behavior, as they covered their prey on 60.9% of all checked kills, compared to males (41.2%). Statistical analysis showed that prey mass and canopy cover did not significantly influence lynx caching behavior. We recorded that covering of the kills helped protecting prey remains against avian scavenger as they were less likely to visit a kill if it was covered. Additionally, bear presence as a kleptoparasite or even local bear density at the kill sites was not confirmed as a significant factor. Thus, we conclude that caching behavior in lynx developed primarily as a defense against kleptoparasitism by avian scavengers. These findings contribute to a better understanding of the lynx feeding behavior and its interspecific interactions.

• Keywords: Eurasian lynx, Lynx lynx, prey caching, kleptoparasitism