diplomsko delo
Polona Bitenc (Author), Franc Janžekovič (Mentor), Boris Kryštufek (Co-mentor), Tina Klenovšek (Co-mentor)

Abstract

Tema diplomskega dela je bila morfometrična analiza variabilnosti leve mandibule pri velikem voluharju, Arvicola terrestris (Linnaeus, 1758), iz osmih različnih geografskih regij. Vse primerke, na katerih je potekala analiza, je priskrbel prof. dr. Boris Kryštufek iz različnih muzejskih zbirk. Za določitev intraspecifične morfološke variabilnosti (variacij v velikosti in obliki mandibule) in sekundarnega spolnega dimorfizma (SSD) znotraj vrste je bila uporabljena metoda geometrijske morfometrije. Na vseh analiziranih mandibulah je bilo določenih 13 oslonilnih točk (landmarks) in na podlagi te postavitve so bile opravljene uni- in multivariatne analize, pri čemer je ločeno potekala analiza velikosti in oblike. Z enosmerno analizo variance ANOVA oz. F-testom je bila potrjena predpostavka, da znotraj vrste ne prihaja do razlik med spoloma. Diskriminantna analiza pa je pokazala na izraženo geografsko variabilnost v velikosti in obliki mandibule. Klastrska analiza je, v skladu s pričakovanji, razkrila izoblikovanje centralne skupine ter dveh oddaljenih vzorcev, glede na geografske razdalje med posameznimi regijami vzorčenja. Časovna analiza je pokazala izoblikovanje treh jasno prepoznavnih velikostnih skupin mandibule. Opazili smo manjšanje splošne velikosti, v istem časovnem razponu pa so se dogajale tudi razlike v obliki mandibule. Izrazito prekrivanje poligonov pa nakazuje, da so te spremembe relativno majhne.

Keywords

diplomska dela;Arvicola terrestris;mandibula;geometrijska morfometrija;morfološka variabilnost;časovna variabilnost;prostorska variabilnost;sekundarni spolni dimorfizem;

Data

Language: Slovenian
Year of publishing:
Typology: 2.11 - Undergraduate Thesis
Organization: UM FNM - Faculty of Natural Sciences and Mathematics
Publisher: [P. Bitenc]
UDC: 599.323.52:616.716.4(043.2)
COBISS: 22048008 Link will open in a new window
Views: 1528
Downloads: 148
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Other data

Secondary language: English
Secondary title: Temporal and spatial variability of mandibular size and shape in European Water Vole, Arvicola terrestris (Linnaeus, 1758)
Secondary abstract: Theme of this thesis was the morphometric analysis of the variability of the European Water Vole's, Arvicola terrestris (Linnaeus, 1758), left mandible from 8 geographic regions. All specimens on which the further analysis was applied, have been provided by prof. dr. Boris Kryštufek, from various museum collections. In the purpose of the intraspecific determination of morphological variability (variations in size and shape of the mandible) and the secondary sexual dimorphism (SSD), the method of geometric morphometrics was used. A total number of 13 landmarks was determined on each of the analysed mandibles and based on this placement uni- and multivariate analyses have been applied, wherein size and shape analysis took place separately. With the one-way analysis of variance ANOVA or. F-test the assumption was confirmed, that intraspecific secondary sexual dimorphism does not occur. Discriminant analysis has shown an expressed geographic variation in the size and shape of the mandible. According to our expectations, cluster analysis has revealed the formation of a central and two outlying groups, according to the the geographic distances between the various regions of sampling. Temporal analysis has shown the formation of three clearly identifiable size groups of the mandible. We observed the reduction of the overall size of the mandible and in the same time span differences in the form of the mandible have occurred. Highly overlapping polygons however indicate that these changes are relatively small.
Secondary keywords: theses;Arvicola terrestris;mandible;geometric morphometrics;morphological variability;temporal variability;spatial variability;secondary sexual dimorphism;
URN: URN:SI:UM:
Type (COBISS): Undergraduate thesis
Thesis comment: Univ. v Mariboru, Fak. za naravoslovje in matematiko, Oddelek za biologijo
Pages: XII, 111 f.
ID: 9128916