The deepest finding of an olm (Proteus anguinus): Zagorska peć, Ogulin, Croatia

During the field work in Zagorska pec cave in Croatia, the olm, Proteus anguinus Laurenti, 1768 was observed in a siphon at depth of 113 m. This was not only the first time that this troglobiotic amphibian was recorded at such depths but also the first time that its research was done by cave-divers in its natural environment, at depths greater than 50 m. As such research is dangerous and difficult there was no previous data on the vertical distribution of the olm in the cave system. Further in situ research will provide valuable insight into species’ environmental preferences and behaviour. Key words: deep dive, cave system, subterranean environment, the olm, vertical distribution. Najgloblja najdba mocerila (Proteus anguinus): Zagorska pec, Ogulin, Hrvaska Mocerila, Proteus anguinus Laurenti, 1768, smo med terenskim delom nasli v sifonu jame Zagorska pec (Hrvaska), na globini 113 m. Poleg izjemne globine najdbe želimo poudariti, da gre za prvi primer opazovanja te jamske dvoživke v naravnem okolju, ki so ga jamski potapljaci izvedli globlje od 50 m. Ker so tovrstni potopi nevarni in težavni, podatkov o vertikalni razporeditvi mocerila v jamskih sistemih doslej se ni bilo. Nadaljnje raziskave in situ lahko prispevajo k boljsemu poznavanju mocerilovih prednostnih okolij in vedenja. Kljucne besede: globoki potop, jamski sistem, podzemlje, moceril, vertikalna razporeditev.