20.500.12556/DKUM-72726 Morfometrična analiza mandibul treh vrst debelorepih skakačev, Pygeretmus (Rodentia: Mammalia) A morphometric analysis of three species of fat-tailed jerboas from the genus Pygeretmus (Rodentia: Mammalia) Debelorepi skakači (rod Pygeretmus) iz reda glodavcev (Rodentia) živijo predvsem v glinenih puščavah in polpuščavah centralne Azije (Nowak, 1999). Zanimala nas je morfološka evolucija pri treh vrstah tega rodu: Pygeretmus platyurus (Lichtenstein, 1823), Pygeretmus pumilio (Kerr, 1792) in Pygeretmus zhitkovi (Vinogradov, 1937). Morfometrično analizo smo izvedli na mandibuli (spodnji čeljustnici), raziskovalna vprašanja pa smo naslovili na preverjanje sekundarnega spolnega dimorfizma, geografske variabilnosti posameznih vrst ter njihove medvrstne variabilnosti. Osnovni cilj je bil prepoznati filogenetski signal od ekološke pogojeno komponente morfometrične variabilnosti. Obstoj sekundarnega spolnega dimorfizma in prisotnost prostorske heterogenosti smo preverjali s statistično analizo podatkov. Dobljene rezultate smo primerjali z obstoječo klasifikacijo. Naši rezultati niso bili v nasprotju s trenutno klasifikacijo treh vrst. Pri dveh vrstah (P. pumilio in P. platyurus) smo potrdili visoko signifikantno geografsko heterogenost, katero smo razložili z dvema ključnima okoljskima dejavnikoma, količino padavin in temperaturo v puščavskem habitatu. Zaradi fragmentarnih genetskih analiz rodu Pygeretmus rezultatov nismo mogli komentirati v širšem filogenetskem okviru. Fat-tailed jerboas (genus: Pygeretmus) from the order of rodents (Rodentia) mostly inhabit clay deserts and semi-deserts of central Asia. We were interested in the morphological evolution of three species of fat-tailed jerboas: Pygeretmus platyurus (Lichtenstein, 1823), Pygeretmus pumilio (Kerr, 1792) in Pygeretmus zhitkovi (Vinogradov, 1937). The morphometric analysis was carried out on the mandible (lower jaw bone). We statistically tested our samples for the presence of secondary sexual dimorphism and geographical heterogeneity. We also confronted the results of the morphological analysis with the current taxonomic classification. Our main goal was to advance the understanding of ecological adaptation in the genus Pygeretmus in the evolutionary context. Two species (P. pumilio and P. platyurus) showed significant geographical variation among populations which correlated with temperature and precipitation. We, therefore, conclude that intraspecific geographic variation may be due to adaptation to local environment. Our results accorded the current taxonomy classification of the genus Pygeretmus into three species. Further genetic analysis, however, is needed to properly understand the evolutionary history in the genus Pygeretmus. debelorepi skakači Pygertmus pumilio Pygeretmus platyurus Pygeretmus zhitkovi mandibula sekundarni spolni dimorfizem geografska variabilnost geometrijska morfometrija fat-tailed jerboas Pygertmus pumilio Pygeretmus platyurus Pygeretmus zhitkovi mandible lower jawbone geometric morphometrics secondary sexual dimorphism geographical variation true true false [N. Raj] Slovenski jezik Angleški jezik Magistrsko delo/naloga 2018-10-25 10:31:06 2018-12-11 13:46:19 2022-08-01 23:02:32 2019-07-11 19:29:00 2018 0 Maribor 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 599.323.3:591.152(043.2) 24217352 URN:SI:UM:DK:NFWIL5SY MAG_Raj_Nejc_2018.pdf MAG_Raj_Nejc_2018.pdf 1 2DF8BE92A449709611375DAAB5C850F5 72814f62f9c576a4b6b29fd3c408533ebd68507ecdfeacf45bba594ef854f447 7d7917b3-7c10-11eb-bb7a-00155d0001ca 20.500.12556/dkum/76b54b8d-e76b-4439-8daa-a7f08f86a5d9 https://dk.um.si/Dokument.php?lang=slv&id=131256 Fakulteta za naravoslovje in matematiko 0 0 0