Razlike širine jagodičnog luka i visine gornjeg očnjaka lisica (Vulpes vulpes) prema dobi i spolu

master's thesis

• Title (english): Variations of the width of zygomatic arch and the height of the upper canine in red foxes (Vulpes vulpes) of the different age and sex
• Author: Domagoj Suton
• Mentor: Hrvoje Lucić (mentor)
• Mentor: Snježana Vuković (mentor)
• Committee member: Damir Mihelić (predsjednik povjerenstva)
• Committee member: Snježana Vuković (član povjerenstva)
• Committee member: Hrvoje Lucić (član povjerenstva)
• Granter: University of Zagreb; Faculty of Veterinary Medicine; (Department of Anatomy, Histology and Embriology); Zagreb
• Defense date and country: 2017-06-14, Croatia
• Scientific / art field, discipline and subdiscipline: BIOMEDICINE AND HEALTHCARE; Veterinary Medicine; Basic and Preclinical Veterinary Sciences

Abstract

Istraživanje je provedeno na podacima dobivenim od ukupno 40 lubanja lisica (20 mužjaka i 20 ženki) u dobnom rasponu od 1 do 9 godina. Korišteni su podaci najveće širine lubanje u području jagodičnog luka, te rostralna dužina i lateralna širina u blizini zubnice očnjaka gornje čeljusti, a dobivene vrijednosti su statistički obrađene. Oba parametra povezana su s načinom hranjenja kanida u smislu lovljenja i trganja plijena. Obavljena je statistička analiza kraniometrijskih parametara i utvrđeno je da dob životinje nema utjecaj na spomenute veličine. Korelacijski odnosi dobi i najveće širine lubanje nepovoljni su i ukazuju da dob nije faktor utjecaja na promjene toga koštanog parametra. Tijekom starenja životinje ovo svojstvo se ne mijenja te stvarna širina lubanje nije povezana s dobi nego vjerojatno isključivo s načinom hranjenja. Jednako kao i s parametrom najveće širine lubanje u području jagodičnih lukova, proporcije zuba očnjaka takođe nisu korelirane s dobi životinje te se tijekom života vjerojatno ne mijenjaju tim utjecajem. U pojedinim slučajevima taj korelacijski odnos čak je i negativan.
Da bi se utvrdila stvarna razlika veličine očnjaka u skupini mužjaka u odnosu na skupinu ženki učinjena je jednostavna matematička analiza kojom su vrijednosti u obje skupine svedene u istu skalu u kojoj se mogu jasnije usporediti. Usporedbom srednjih vrijednosti matematički dobivenog koeficijenta veličine očnjaka i njenog odstupanja u istraženim skupinama utvrđena je mala ili gotovo zanemariva razlika u veličini zuba između mužjaka i ženki. Razlog je vjerojatno u tome što ženka koja ima mladunce mora pronalaziti bogatije izvore hrane nego mužjak pa vjerojatno i više loviti.

Abstract (english)

Research was done on data obtained from a total of 40 skulls of foxes (20 males and 20 females) in the age range from 1 to 9 years. the data used were of the greatest width of the skull in the region of zygomatic arch, and rostral lenght and lateral width near to the dental alveola of the upper jaw canin, and data obtained are statistically processed. Both parameters are related to the way of feeding of the canids in terms of catching and tearing the prey. Statictic analysis of craniometric parameters was done, and it found that animal age has no influence on tested parameters. Correlations of the age and greatest width of the skull are unfavorable, and show that age is not a factor which affecting the changes of that bone parameters. During the animal aging these parameters does not change and the actual width of the skull is not associated with age but probably only by way of feeding. Just as with parameter as the skull width in the zygomatic arches, the proportions of canine teeth are also not correlated with the age of the animal, and for life probably do not change this influence. In some cases, the correlation is even negative. In order to determine the actual difference in canine size in the group of males to the group of females, we made a simple mathematical analysis that the values in both groups kept the same scale where it can be clearly compare. By comparing of the mean values of the obtained mathematical coefficient of the canine size and its variations in the investigated groups was determined by a small or negligible difference in tooth size between males and females. The reason is probably because female who has pups must find richer food sources than male and probably must more to hunt.

• Keywords: lisica; najveća širina lubanje; jagodični luk lisice; očnjak lisice
• Keywords (english): red fox; greatest width of the skull; zygomatic arch of the fox; canine tooth of the fox
• Language: croatian
• URN:NBN: urn:nbn:hr:178:200281
• Study programme: Title: Veterinary Medicine; Study programme type: university; Study level: integrated undergraduate and graduate; Academic / professional title: doktor/doktorica veterinarske medicine (doktor/doktorica veterinarske medicine)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2018-07-23 08:53:44