magistrsko delo
Marko Pšajd (Author), Franc Janžekovič (Mentor), Boris Kryštufek (Co-mentor)

Abstract

Z uporabo metod geometrijske morfometrije smo analizirali morfološko variabilnost spodnje čeljustnice pri vrtni voluharici (Microtus subterraneus). Analizirali in ovrednotili smo morebitni pojav sekundarnega spolnega diformizma ter variabilnost v velikosti in obliki spodnje čeljustnice med ontogenetskim razvojem. Raziskovalni material je obsegal 236 spodnjih čeljustnic vrtne voluharice vzgojenih v in vitro pogojih na Karlovi Univerzi v Pragi. Sekundarni spolni dimorfizem ni bil izražen niti v velikosti niti obliki spodnje čeljustnice, zato smo oba spola obravnavali združeno. Velikost in oblika spodnje čeljustnice vrtne voluharice sta se tekom ontogeneze spreminjali. Z največjo stopnjo rasti se je spodnja čeljustnica razvijala do šestdesetega dneva starosti, po tem pa je bila rast umirjena a konstantna, razvoj oblike pa se je zaustavil. Potrdili smo signifikantne razlike v velikosti spodnje čeljustnice med starostnimi razredi. Juvenilni osebki imajo najmanjšo spodnjo čeljustnico, ki pa se s starostjo konstantno povečuje skozi celotno življenjsko obdobje. Oblika spodnje čeljustnice se je spreminjala glede na starostne razrede. Najbolj so odstopali juvenilni osebki medtem ko pri adultnih in senilnih osebkih ni prihajalo do značilnih razlik v obliki spodnje čeljustnice. Spodnje čeljustnice mlajših in starejšh osebkov so odstopale od povprečne oblike v alveolni regiji in v njenem zadnjem delu. Z analizo ontogenetske alometrije smo dokazali tesno povezavo med obliko in velikostjo spodnje čeljustnice. Odnos med obliko in velikostjo je bil pri vseh starostnih skupinah bolj ali manj linearen.

Keywords

magistrska dela;Microtus subterraneus;spodnja čeljustnica;geometrijska morfometrija;ontogenija;spolni dimorfizem;alometrija;

Data

Language: Slovenian
Year of publishing:
Typology: 2.09 - Master's Thesis
Organization: UM FNM - Faculty of Natural Sciences and Mathematics
Publisher: [M. Pšajd]
UDC: 599.323.52:591.152(043.2)
COBISS: 84852739 Link will open in a new window
Views: 258
Downloads: 21
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Other data

Secondary language: English
Secondary title: Postnatal development of the pine vole Microtus subterraneus geometric morphometric approach
Secondary abstract: Using the methods of geometrics morphometrics, we analyzed the morphological variability of the mandible of the European pine vole (Microtus subterraneus). We analyzed and evaluated the putative phenomenom of sexual dimorphism and variability in size and shape during ontogenetic development. The research material included 236 mandibles of the specimens breed in vitro in the Charles University in Prague. Because no secondary sexual dimorphism was detected in size or shape of the mandible, all analyses were conducted on pooled sexes. Size and shape of the mandible changed during the ontogenetic development. The greatest level of development was detected during the first 60 days of life. Afterwards, the growth was steady and constant, while shape showed no further change. We confirmed significant differences in size between age groups. Juvenile specimens had the smallest mandibles which grew at constant pace throughout the entire span of life. The shape of the mandible varied according to age groups. Variability in shape was the greatest amoung juvenile specimens. Meanwhile there was no significant shape difference between adults and senile specimens. Juvenile and adult voles showed shape differences in both major regions of the mandible, the alveolar and the posterior region, respectively. Ontogenetic allometry retrieved close correlation between the mandible shape and size. The relationship was more or less linear in all age groups.
Secondary keywords: master theses;Microtus subterraneus;mandible;geometric morphometrics;ontogeny;sexual dimorphism;allometry;Vrtna voluharica;Mandibula;Ontogenija;Univerzitetna in visokošolska dela;
Type (COBISS): Master's thesis/paper
Thesis comment: Univ. v Mariboru, Fak. za naravoslovje in matematiko, Oddelek za biologijo
Pages: IX, 46 f.
ID: 12518544