53 KB198 KB21 KB198020212006Janžekovič, FrancKalan, GregorMirt, Brankaštevilka:130/131letnik:278 stranistr. 147-154ISSN:0351-2851COBISSID:15471624URN:URN:NBN:SI:doc-CAP3OFPKslDruštvo za opazovanje in proučevanje ptic SlovenijeAcrocephalusbirdfoodkarstKozjanskoKraslesna sovaprehranapticesezonska dinamikaSloveniaSlovenijaPrehrana lesne sove Strix aluco na Kozjanskem (V Slovenija)| Diet of the tawny owl Strix aluco in the Kozjansko region (E Slovenia)|During the period autumn 2002 - spring 2005, 600 pellets of the Tawny Owl Strix aluco from 13 localities were collected, in which 2,028 prey units were found. Mostly, small mammals (50.4%) and insects (38.2%) had been preyed on. A total of 59 taxa were found in the pelleds, of which 21 were mammal and 13 beetle species were identified. The most common prey species were the Yellow-necked Mouse Apodemus flavicollis (17.2%) and the Wood Mouse Apodemus sylvaticus (6.6%). The highest biomass proportion in the Tawny Owl's diet was that for the Pat Dormouse Glis glis (28.3%). The owls fed on prey opportunistically, reflecting a wide feeding niche (H' = 0.886). Seasonal changes in prey species ratio was established. For the very first time, the presence of Alpine Pine Vole Microtus multiplex was noted in the Kozjansko regionV članku je prikazana prehrana lesne sove Strix aluco na območju Kozjanskega. V obdobju od jeseni 2002 do pomladi 2005 smo na 13 lokalitetah nabrali 600 izbljuvkov in evidentirali 2028 enot plena. Polovico plena je lesna sova pridobila s plenjenem malih sesalcev (50.4%), več kot tretjino pa s plenjenjem velikih žuželk (38.2%). V izbljuvkih smo določili 59 taksonov, od tega 21 vrst sesalcev in 13 taksonov hroščev. Lesna sova je najpogosteje plenila rumenogrlo miš Apodemus flavicollis (17.2%) in navadno belonogo miš Apodemussylvaticus (6.6%). Največji delež biomase plena v prehrani lesne sove je šel na račun navadnega polha Glis glis (28.3%). Plen je sova izbirala oportunistično, kar se izkazuje z veliko pestrostjo uplenjenih vrst in visokim indeksom trofične diverzitete (H' = 0.886). Predstavljene so spremembe vrstne sestave plena glede na letne čase, v zimskem obdobju ni polhov, dvoživk in žuželk, ki zunaj zimskega obdobja zasedajo ca. polovico biomasnega deleža plena. V izbljuvkih smo našli ostanke ilirske voluharice Microtus multiplex, ki doslej ni bila znana za območje KozjanskegaTEXTznanstveno časopisjejournalsSlovenian National E-content AggregatorNational and University Library of SloveniaDruštvo za opazovanje in proučevanje ptic Slovenije