Morfometrična variabilnost mandibule pri vrtnih voluharicah rod Terricola

magistrsko delo

Maša Kladnik (Author), Franc Janžekovič (Mentor), Boris Kryštufek (Co-mentor)

Abstract

V magistrskem delu sem analizirala medvrstno variabilnosti v velikosti in obliki mandibule pri štirinajstih vrstah voluharic iz rodu Microtus ter geografsko variabilnost vrste Microtus subterraneus. V analizo je bilo vključenih 635 mandibul. Analizo sem izvedla z metodami geometrijske morfometrije, na osnovi 13 naslonskih točk, ki sem jih določila na labialni strani posamezne mandibule. Analizo morfološke variabilnosti med spoloma sem izvedla pri vrstah, kjer je bila zastopanost vsakega od spolov večja od 10 osebkov. Sekundarni spolni dimorfizem (SSD) v velikosti sem analizirala s t-testom, SSD v obliki pa z multivariatno analizo variance - MANOVA. Razlika ni bila signifikantna, niti v velikosti niti v obliki, zato sem spola obravnavala združeno. Medvrstno variabilnost v velikosti sem preverila z analizo variance oziroma F-testom, ki je bil visoko signifikanten: F 13, 621 = 145,16 p < 0,0001. S posteriornim testiranjem sem preverila razlike med posameznimi pari vrst. Iz rezultatov je razvidno, da se je 14 vrst voluharic statistično značilno razlikovalo v centroidni velikosti mandibule. Najmanjši so bili osebki M. subterraneus in M. daghestanicus. Nekoliko večji od povprečja so bili predstavniki vrst M. pyrenaicus in M. duodecimcostatus. Preostale vrste so izkazale podobne vrednsoti CS. Variabilnost oblike sem analizirala z multivariatnim F-testom. Vrednosti skorov za prvih deset glavnih komponent so predstavljale odvisno spremenljivko, vrstna pripadnost pa neodvisno. Vrednost testa je bila visoko signifikantna - Wilksonova lambda je znašala 0,071; F 130, 4912 = 14,85; p < 0,0001. Po obliki sta si bili najbolj podobni vrsti M. liechtensteini in M. daghestanicus. Geografsko variabilnost v velikosti in obliki mandibule sem analizirala pri osmih geografskih vzorcih M. subterraneus. Variabilnost v velikosti sem preverila z analizo variance. Rezultati izkazujejo delitev v dve prepoznavni velikostni skupini. Telesno manjšo skupino so sestavljali vzorci iz centralne Evrope (Avstrija in Nemčija), telesno večjo skupino pa vzorci iz Makedonije in Turčije. Analiza variance je bila visoko signifikantna F7, 222 = 28,85; p < 0,0001. Le med vzorci, najdenimi v dveh nemških zveznih deželah - Porenje in Bavarska ni bilo zaznati signifikantnih razlik. Razlike v obliki sem preverjala z diskriminantno analizo. Rezultati so razvrstili vzorce v tri skupine. Prvo skupino so tvorile makedonske živali, v drugo sta uvrščena turška vzorca, v tretji so združeni avstrijski in nemški vzorci.

Keywords

magistrska dela;Microtus;Terricola;geometrijska morfometrija;morfološka variabilnost;mandibula;oslonilna točka;

Data

Language:	Slovenian
Year of publishing:	2017
Typology:	2.09 - Master's Thesis
Organization:	UM FNM - Faculty of Natural Sciences and Mathematics
Publisher:	[M. Kladnik]
UDC:	599.323.52:591.152(043.2)
COBISS:	23335432
Views:	978
Downloads:	142
Average score:	0 (0 votes)
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Other data

Secondary language:	English
Secondary title:	Morphometric variability of the mandible of the Terricola voles
Secondary abstract:	The aim of this study was to analyze morphological variability of mandible of the Microtus (Terricola) voles. The analysis comprised of 635 mandible samples from 14 different species of Microtus genus. On each of the analysed mandibles 13 landmarks ware determinated. Separated analysis for the size and shape of the mandibles was performed. In the purpose of the intraspecific determination of morphological variability the method of geometric morphometric was used. The analysis of morphological variability betwen the sexes did not detect secondary sexual dimorphism (SSD) in size (t test showed no significance) nor shape of mandibla (F test is not signicicant). Therefore I could conclude that the secondary sexual dimorphism was not expressed. Interspecific variations in size of mandibula was analysed with F-test which showed high significance F 13, 621= 145,16 p < 0,0001. Posterior test was used to check for differences between individual species. The results showed that there is a signicicant difference in size between the pairs. Variability in shape of mandible was tested using multivariate F test. First 10 main components were dependent variable, species were representing independet variable. The value of F test was highly significant. F 130, 4912 = 14,85; p < 0,0001. The most similar species are M. liechtensteini and M. daghestanicus. Geographic variability was analysed for 8 geographical groups, for one species - M. subterraneus, with MANOVA test, which was highly significant F7, 222 = 28,85; p < 0,0001. Discriminant analysis has revealed the formation of three outlying groups. In first group there are species from Central Europe - Austria and Germany. In second group there are animals from Macedonia in third are represented specimens from Hungary.
Secondary keywords:	master theses;Microtus;Terricola;geometric morphometrics;morphological variability;mandible;landmark;
URN:	URN:SI:UM:
Type (COBISS):	Master's thesis/paper
Thesis comment:	Univ. v Mariboru, Fak. za naravoslovje in matematiko, Oddelek za biologijo
Pages:	IX, 63 f.
ID:	10860162