Raznolikost v obliki lobanje in meljakov pri mišjih hrčkih, Calomyscus

magistrsko delo

Klavdija Prot (Author), Franc Janžekovič (Mentor), Boris Kryštufek (Co-mentor)

Abstract

V sklopu magistrskega dela sem s pomočjo geometrijske morfometrije preučevala razlike v variabilnosti lobanje ter morfometrične odnose med vrstami rodu Calomyscus. Uporabila sem material iz različnih muzejskih zbirk. Analizirala sem okluzalno površino zgornjih meljakov ter lobanjo iz treh perspektiv (ventralno, dorzalno in lateralno stran). Raziskava je vključevala štirinajst lobanj, ki so pripadale osmim različnim vrstam, in sicer C. bailwardi, C. baluchi, C. elburzensis, C. grandis, C. hotsoni, C. mystax, C. tsolovi in C. urartensis. Namen magistrskega dela je ovrednotenje morfometrične pestrosti med vrstami tako v obliki kot v velikosti obravnavanih struktur. Zanimalo me je, ali posamezni segmenti lobanje izkazujejo značilne razlike med obravnavanimi vrstami. Analizo velikosti sem izvedla z vrednostmi centroidnih velikosti. Izrazito sta odstopala C. tsolovi (nizke vrednosti centroidne velikosti) in C. baluchi mustersi (visoke vrednosti centroidne velikosti). Variabilnost v obliki sem ovrednotila s prvima dvema glavnima komponentama, dobljenima v analizi PCA. Na osnovi oblike je bila opazna variabilnost med vrstami in znotraj njih. Izrazito je odstopal C. tsolovi, in sicer v vrednostih dorzalne in lateralne strani lobanje. Morfometrične odnose med taksoni sem predstavila z Evklidovimi razdaljami za vsak lobanjski segment (meljaki, ventralna, dorzalna in lateralna stran lobanje) posebej. V obliki meljakov se je najbolj razlikoval C. hotsoni, v obliki lateralne in dorzalne strani lobanje pa C. tsolovi. Podobnost v morfometričnih odnosih v obliki različnih segmentov lobanje in meljakov sem ugotavljala s korelacijsko analizo med posameznimi matrikami. Signifikantno podobnost (p < 0,05) sem potrdila le med Evklidovimi razdaljami lateralne in dorzalne strani lobanje. V ostalih parnih primerjavah nisem ugotovila signifikantnih korelacijskih koeficientov (p > 0,05). Dokazano so lobanjske strukture neodvisne druga od druge. Zaključujem, da med vsemi analiziranimi vrstami najbolj izstopa C. tsolovi.

Keywords

magistrska dela;Calomyscus;geometrijska morfometrija;lobanje;medvrstna variabilnost;meljaki;morfometrični odnosi;

Data

Language:	Slovenian
Year of publishing:	2019
Typology:	2.09 - Master's Thesis
Organization:	UM FNM - Faculty of Natural Sciences and Mathematics
Publisher:	[K. Prot]
UDC:	599.323.8(043.2)
COBISS:	24915976
Views:	626
Downloads:	72
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	English
Secondary title:	Diversity in shape of skull and molars in mouse-like hamsters, Calomyscus
Secondary abstract:	As part of my master thesis, I studied variances in skull variability and morphometric relations among species of the Calomyscus genus. I worked with different material collections from museums. I analysed the occlusal surface of the upper molar teeth as well as the skull from three different perspectives (ventral, dorsal and lateral). The research involved fourteen skulls from eight different species, i.e. C. bailwardi, C. baluchi, C. elburzensis, C. grandis, C. hotsoni, C. mystax, C. tsolovi and C. urartensis. The aim of the thesis was to evaluate the morphometric diversity among the mentioned species, in terms of the shape as well as the size of the examined structures. I examined if separate skull segments show specific differences among the observed species. The size analysis was conducted using values of centroid size units. A noticeable deviation could be observed with the species C. tsolovi (low levels of centroid size) and C. baluchi mustersi (high levels of centroid size). The variability of shape was evaluated through the first two main components, which were gained in the Principal component analysis (PCA). Observing the shape, a variability could be observed between and within the species. A noticeable deviation could be observed with the species C. tsolovi, explicitly regarding the values of the dorsal and lateral skull side. The morphometric relations among taxons have been demonstrated using the Euclidean distance matrix for each individual skull segment separately (molar teeth as well as the ventral, dorsal and lateral side of the skull). Regarding the shape of the molar teeth, the most significant deviation could be observed with the species C. hotsoni. When focusing on the shape of the lateral and dorsal skull side, the major deviation could be observed with the C. tsolovi species. The resemblance in morphometric relations in the shape of different skull segments and molar teeth has been examined using the correlation analysis among individual matrices. A significant similarity (p < 0,05) could be confirmed only among Euclidean distances in the lateral and dorsal side of the skull. In other dual comparisons no significant correlation coefficients (p > 0,05) could be discovered. It could be proven that skull structures do not correlate among each other and are independent. The research can be concluded with the finding that among all of the analysed species, C. tsolovi is the most distinct one.
Secondary keywords:	master theses;Calomyscus;geometric morphometrics;skull;variability among species;molar teeth;morphometric relations;
Type (COBISS):	Master's thesis/paper
Thesis comment:	Univ. v Mariboru, Fak. za naravoslovje in matematiko, Oddelek za biologijo
Pages:	XI, 59 str.
ID:	11206160