magistrsko delo
Nejc Raj (Author), Franc Janžekovič (Mentor), Boris Kryštufek (Co-mentor), Tina Klenovšek (Co-mentor)

Abstract

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 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.

Keywords

magistrska dela;debelorepi skakači;Pygeretmus pumilio;Pygeretmus platyurus;Pygeretmus zhitkovi;mandibule;sekundarni spolni dimorfizem;geografska variabilnost;geometrijska morfometrija;

Data

Language: Slovenian
Year of publishing:
Typology: 2.09 - Master's Thesis
Organization: UM FNM - Faculty of Natural Sciences and Mathematics
Publisher: [N. Raj]
UDC: 599.323.3:591.152(043.2)
COBISS: 24217352 Link will open in a new window
Views: 816
Downloads: 54
Average score: 0 (0 votes)
Metadata: JSON JSON-RDF JSON-LD TURTLE N-TRIPLES XML RDFA MICRODATA DC-XML DC-RDF RDF

Other data

Secondary language: English
Secondary title: ǂA ǂmorphometric analysis of three species of fat-tailed jerboas from the genus Pygeretmus (Rodentia: Mammalia)
Secondary abstract: 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.
Secondary keywords: master theses;fat-tailed jerboas;Pygeretmus pumilio;Pygeretmus platyurus;Pygeretmus zhitkovi;mandibles;lower jawbone;geometric morphometric;secondary sexual dimorphism;geographical variation;
URN: URN:SI:UM:
Type (COBISS): Master's thesis/paper
Thesis comment: Univ. v Mariboru, Fak. za naravoslovje in matematiko, Oddelek za biologijo
Pages: VIII, 66 f.
ID: 10979855