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Title:Morfometrična analiza mandibul treh vrst debelorepih skakačev, Pygeretmus (Rodentia: Mammalia)
Authors:ID Raj, Nejc (Author)
ID Janžekovič, Franc (Mentor) More about this mentor... New window
ID Kryštufek, Boris (Comentor)
ID Klenovšek, Tina (Comentor)
Files:.pdf MAG_Raj_Nejc_2018.pdf (2,91 MB)
MD5: 2DF8BE92A449709611375DAAB5C850F5
PID: 20.500.12556/dkum/76b54b8d-e76b-4439-8daa-a7f08f86a5d9
 
Language:Slovenian
Work type:Master's thesis/paper
Typology:2.09 - Master's Thesis
Organization:FNM - Faculty of Natural Sciences and Mathematics
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 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.
Keywords:debelorepi skakači, Pygertmus pumilio, Pygeretmus platyurus, Pygeretmus zhitkovi, mandibula, sekundarni spolni dimorfizem, geografska variabilnost, geometrijska morfometrija
Place of publishing:Maribor
Publisher:[N. Raj]
Year of publishing:2018
PID:20.500.12556/DKUM-72726 New window
UDC:599.323.3:591.152(043.2)
COBISS.SI-ID:24217352 New window
NUK URN:URN:SI:UM:DK:NFWIL5SY
Publication date in DKUM:11.12.2018
Views:1580
Downloads:87
Metadata:XML DC-XML DC-RDF
Categories:FNM
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Licences

License:CC BY-NC-ND 4.0, Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
Link:http://creativecommons.org/licenses/by-nc-nd/4.0/
Description:The most restrictive Creative Commons license. This only allows people to download and share the work for no commercial gain and for no other purposes.
Licensing start date:25.10.2018

Secondary language

Language:English
Title:A morphometric analysis of three species of fat-tailed jerboas from the genus Pygeretmus (Rodentia: Mammalia)
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.
Keywords:fat-tailed jerboas, Pygertmus pumilio, Pygeretmus platyurus, Pygeretmus zhitkovi, mandible, lower jawbone, geometric morphometrics, secondary sexual dimorphism, geographical variation


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