Vzorci aktivnosti in rabe prostora kot pokazatelj interakcij med samico in samcem evrazijskega risa

Črtalič, Jaka (author), Kos, Ivan (mentor), Potočnik, Hubert (co-mentor)

Evrazijski ris (Lynx lynx) je večino svojega življenja samotarska žival. Svoj domači okoliš si navadno deli s »partnerskim« osebkom nasprotnega spola, s katerim je navadno le v indirektnem kontaktu ter do osamosvojitve tolerira tudi svoje potomce. Mikro-socialne odnose med osebki vrste kot je Evrazijski ris je zelo težko spremljati. V naši raziskavi smo imeli izjemno redko priložnost istočasno spremljati teritorialnega samca in samico, ki sta si delila svoj domači okoliš na območju Male gore nad Ribnico. Proučevana osebka sta bila generalno gledano aktivna predvsem v času svita in zore. Sezonsko gledano sta bila najbolj aktivna v predparitveni sezoni in najmanj v času kotitve samice. Analiza velikosti domačih okolišev (95% MCP) je pokazala, da sta imela tako samec (154 km2) kot tudi samica (60 km2) občutno manjše domače okoliše od povprečja pridobljenih podatkov v literaturi za to vrsto. Ne glede na to, da je bil domači okoliš samice skozi celotno leto znotraj domačega okoliša samca, z izjemo obdobja brejosti samice (96% prekrivanje), pa direktna srečanja niso bila pogosta. V približno devetih mesecih spremljanja sta bila le 24-krat v direktnem kontaktu. V tej raziskavi smo zaznali izjemno redek primer induciranega estrusa samice evrazijskega risa, ki ga je induciral samec po prihodu na samičin domači okoliš, ko jo je tudi oplodil. Rezultati se v večini skladajo z zaključki iz podobnih raziskav na temo socialnih interakcij.

• Language: Slovenian
• Keywords: Ris, Lynx lynx, socialne interakcije, vzorci gibanja, aktivnost, domači okoliš
• Work type: Master's thesis/paper
• Typology: 2.09 - Master's Thesis
• Organization: BF - Biotechnical Faculty
• Publisher: [J. Črtalič]
• Year: 2023
• Number of pages: X,
• PID: 20.500.12556/RUL-145119
• UDC: 592/599
• COBISS.SI-ID: 149510659
• Publication date in RUL: 07.04.2023

Secondary language

• Language: English
• Title: Activity patterns and patterns of habitat use as an indicator of interactions between female and male Eurasian lynx (Lynx lynx)

Abstract

The Eurasian lynx (Lynx lynx) is a mostly solitary animal. It usually shares its home range with an individual of the opposite sex largely avoidingdirect contact. The female tolerates its offsprings until they become independent. Micro-social relationships between individuals are very difficult to monitor. We had a rare opportunity to simultaneously observe a territorial male and female who shared their home range in the area of Mala gora near to the town of Ribnica in southern Slovenia. The studied individuals were active mainly at dawn and dusk. They were most active during the pre-mating season and least active during partruition. Home range size analysis (95% MCP) showed that both the male (154 km2) and female (60 km2) had significantly smaller home ranges than the average for this species. Although the male and female's home ranges overlapped completely throughout the year, except during the female's pregnancy (96% overlap), direct encounters were not frequent. In approximately nine months of monitoring, they were only 24 times in direct contact. In this study, we detected an extremely rare case of induced estrus of female Eurasian lynx in nature. Upon arrival of the male lynx on the female's home range, the male induced the female's estrus and fertilized her in the first week of June, when the female should have already given birth. Our results are in general comparable with the results from similar researches.

• Keywords: Eurasian lynx, Lynx lynx, social interactions, activity, home range