[magistrsko delo]
Eva Oblak Zvonar (Author), Franc Janžekovič (Mentor), Boris Kryštufek (Co-mentor)

Abstract

V magistrskem delu sem analizirala variabilnost dorzalne strani lobanje navadnega polha (Glis glis). Preverjala sem obstoj razlik med spoloma, med različnimi starostnimi skupinami in med skupinami živali z različnih območij ter med polhi, ulovljenimi v različnih letih na istem območju. V analizo sem vključila 445 lobanj polhov, ulovljenih na šestih območjih Slovenije. Na dorzalni strani lobanje sem določila 14 naslonskih točk in z metodami geometrijske morfometrije ovrednotili variabilnost v velikosti lobanje in v obliki lobanje. Kategorije, ki sem jih upoštevala v analizah so bile: spol (samci, samice), starost (šest starostnih skupin, glede na erupcijo zob in datum ulova), lokaliteta (Korinj, Krim in Prestranek) in leto ulova (1997, 1999 in 2001). Ugotovila sem, da se samci in samice navadnega polha, tako v velikosti, kot tudi v obliki lobanje, med seboj ne razlikujejo. Razlike so bile izrazite med starostnimi skupinami, saj tekom ontogenetskega razvoja lobanja raste in se razvija. V analizi variabilnosti dorzalne strani polšje lobanje sem ugotovila, da je velikost lobanje časovno, ne pa tudi prostorsko variabilna. Menim, da je za časovno variabilnost dorzalne strani lobanje, tako v velikosti kot v obliki, posledica dostopnosti hrane. Primarna hrana polha je bukov žir, njegov obrod se od leta do leta močno razlikuje. Za razlago povezanosti obroda žira in morfološke variabilnosti bodo potrebne nadaljnje raziskave. Prostorska variabilnost je verjetno posledica prilagoditev na lokalne ekološke razmere, torej odziv fenotipa na klimo in druge dejavnike.

Keywords

magistrska dela;prostorska variabilnost;geometrijska morfometrija;časovna variabilnost;medvrstna variabilnost;lobanja;Glis glis;

Data

Language: Slovenian
Year of publishing:
Typology: 2.09 - Master's Thesis
Organization: UM FNM - Faculty of Natural Sciences and Mathematics
Publisher: [E. Oblak Zvonar]
UDC: 599.323.2(043.2)
COBISS: 24916744 Link will open in a new window
Views: 835
Downloads: 83
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Other data

Secondary language: English
Secondary title: Spatial and temporal variability of the fat dormouse (Glis glis) skull
Secondary abstract: The purpose of the master thesis was to determine the variability in skull of the fat dormouse. The research was focused on the differences between sexes, age groups as well as on geographic and temporal variability. The sample contained 445 skulls of dormice, caught in a few areas across Slovenia. The analysis was carried out on photos of the dorsal side of the skull, with 14 ground control points determined. The methods of geometric morphometry were then used. The sample for each analysis was separated according to gender, age group, area and the year the animal was caught. Based on the results, there are no gender-based differences in the skull of dormice. The differences do appear when comparing different age groups, as the skull is growing and changing during the period of ontogenetic development. The centroid size of the skull is influenced by temporal, but not by spatial variability. However, the shape is affected by both. It is possible that the temporal variability of the dorsal side of the skull (size and shape) is the consequence of the availability of the primary food source (beech nuts), which varies heavily from year to year. The spatial variability of the skull shape is most likely influenced by local environmental factors, such as phenotypic adaptation to local climate.
Secondary keywords: master theses;Glis glis;geometric morphometrics;skull;temporal variability;geographic variability;
Type (COBISS): Master's thesis/paper
Thesis comment: Univ. v Mariboru, Fak. za naravoslovje in matematiko, Oddelek za biologijo
Pages: VIII, 58 str.
ID: 11224483