20.500.12556/RUL-105947 Vrednotenje odziva gozdnih ptic na oglašanje malega skovika (Glaucidium passerinum) kot indikator prisotnosti plenilca Evaluation of the response of forest birds to the vocalization of the Eurasian Pygmy Owl (Glaucidium passerinum) as an indication of predator presence V naravi se ptice na svojega plenilca malega skovika (Glaucidium passerinum) burno odzovejo z agresivnim vedenjem, čemur pravimo mobing. Želeli smo ugotoviti, kakšna je specifičnost intenzitete odziva gozdnih ptic na oglašanje malega skovika glede na območja z in brez prisotnosti malega skovika, katere ptice se odzivajo in v kakšnem številu ter kakšne so sezonske spremembe odziva ptic. Poleg tega smo želeli oceniti še zanesljivost ocenjevanja prisotnosti malega skovika z beleženjem odziva ptic. Terensko delo smo opravili na Jelovici, kjer je mali skovik prisoten, in v gozdu pri Brniku, ki je bilo kontrolno območje brez malega skovika. Na več točkah smo v jutranjem času predvajali posnetek oglašanja malega skovika in beležili odziv ptic. Ugotovili smo, da je odziv vrstno in krajevno specifičen, saj se ptice odzivajo le na plenilca, ki ga poznajo (v tem primeru malega skovika) in le na območju, kjer je le-ta prisoten. Večinoma se odzivajo vrste, ki predstavljajo potencialen plen malega skovika, poleg odraslih osebkov so v mobing vključeni tudi mladi osebki. Jeseni je bil odziv ptic intenzivnejši, saj je bila številčnosti ptic, ki so se odzvale precej večja kot spomladi. Zaradi specifičnosti bi odziv ptic lahko uporabljali za ugotavljanje prisotnosti oziroma odsotnosti malega skovika na določenem območju. In the wild, small birds respond to their predator, the Eurasian Pygmy Owl Glaucidium passerinum, with aggressive behaviour, i.e. mobbing. We aimed to determine the specificity of response rate of the forest birds to the broadcast vocalization of the Eurasian Pygmy Owl comparing between areas with and without the owl presence. We compared species structure of mobbing birds taking into account their numbers and seasonal changes in the response rate. In addition, we wanted to assess the reliability of estimating the presence of the Eurasian Pygmy Owl by recording the response of mobbing birds. Filedwork was carried out at Mt. Jelovica, where the Eurasian Pygmy Owl is present, and in the lowland forest near Brnik, which was the control area without the owl. We broadcast the playback of the Eurasian Pygmy Owl male song on multiple sites in the area in the morning and observed the response of the birds. We found that mobbing response is species-specific and locally specific, since birds responded only in the areas with the Eurasian Pygmy Owl being present. Mostly the species that represent the potential prey of the owl responded, in addition to adult specimens, young specimens are also involved in mobbing. In autumn, the response of birds was more intensive, with the birds responding in much higher numbers than in spring. Because of the specificity, the mobbing response of the birds could be used as a reliable indication of the presence of the Eurasian Pygmy Owl in a particular area. sova Aves mobing specifičnost odziva posnetek plenjenje vedenjski poskus popis sezonske spremembe owl Aves mobbing specific response playback predation behavioural experiment survey seasonal changes true false false Slovenski jezik Angleški jezik Magistrsko delo/naloga 2018-12-30 07:45:07 2018-12-30 07:45:12 2022-08-18 03:47:00 0000-00-00 00:00:00 2018 0 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 163259 4964175 5683.pdf 5683.pdf 1 753904B5BCE8A8A3F9F7F4C21F817F68 630a3d03cfb132a29bb5e47afd5897b02ad5819fadf78c0d29dcc3183c1a7d05 3ea777ce-a1b6-11eb-a523-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=116643 Biotehniška fakulteta 0 0 0