Postnatalno sraštavanje kostiju glave dobrog dupina (Tursiops truncatus) iz Jadranskog mora

master's thesis

• Title (english): Postnatal Ossification of Cranial Bones in the Bottlenose Dolpin (Tursiops truncatus) from the Adriatic Sea
• Author: Toni Maleš
• Mentor: Martina Đuras (mentor)
• Committee member: Tajana Trbojević Vukičević (predsjednik povjerenstva)
• Committee member: Snježana Kužir (član povjerenstva)
• Committee member: Martina Đuras (član povjerenstva)
• Granter: University of Zagreb; Faculty of Veterinary Medicine; (Department of Anatomy, Histology and Embriology); Zagreb
• Defense date and country: 2020-10-09, Croatia
• Scientific / art field, discipline and subdiscipline: BIOMEDICINE AND HEALTHCARE; Veterinary Medicine; Basic and Preclinical Veterinary Sciences

Abstract

Jadransko more nastanjuje populacija dobrih dupina (Tursiops truncatus) koja se smatra ugroženom i zakonom je zaštićena. U istraživanju divljih, a posebno zaštićenih životinja, važnu ulogu ima morfologija lubanje jer upućuje na biološke karakteristike kao što su vrsta, populacija, spol i dob. Uslijed prilagodbe životu u vodi kitovi su prošli brojne morfološke promjene tijekom evolucije. U području lubanje to su asimetričnost i teleskopski rast koji predstavlja produljenje rostralnih kostiju i dorzorostralno pomicanje kaudalnih kostiju lubanje. Kako bi se stekao uvid u način rasta takve lubanje pregledani su stupnjevi okoštavanja spojeva 25 lubanja dobrog dupina (Tursiops truncatus) iz Jadranskoga mora iz zbirke Zavoda za anatomiju, histologiju i embriologiju Veterinarskoga fakulteta Sveučilišta u Zagrebu. Uočeno je da je dio spojeva u području neurokranija okoštao već prilikom rođenja dobrog dupina, a najveći dio preostalih šavova počinje okoštavati nakon rođenja. Najbrže okoštavaju spojevi baze lubanje čime ventralni dio lubanje brže sraste od dorzalnog dijela. Većina šavova prati pravilan redoslijed okoštavanja. U ženki šavovi glave brže okoštaju što upućuje na to da ženke dobrog dupina završe fizički rast u ranijoj dobi nego mužjaci.

Abstract (english)

The Adriatic Sea inhabits a population of the bottlenose dolphin (Tursiops truncatus) which is considered to be endangered and is legally protected. In the research of wild and especially protected animals, skull morphology plays an important role because it refers to biological characteristics such as species, population, sex and age. Due to adaptation to life in the water whales have undergone numerous morphological changes during evolution. In the skull area, these are asymmetry and telescopic growth, which include the elongation of the rostral bones and dorsorostral movement of the cranial bones. In order to gain insight into the growth of such skull, we examined the ossification stages of joints on 25 skulls of the bottlenose dolphin (Tursiops truncatus) from the Adriatic Sea hosted in the collection of the Department of Anatomy, Histology and Embryology at the Faculty of Veterinary Medicine, University of Zagreb. It has been noted that some of the joints in the neurocranial area had been ossified since the birth of the bottlenose dolphin and most of the remaining sutures begin to ossify after birth. Joints on the base of the skull are the ones that have the fastest rate of ossification which means that the closure of the ventral braincase is prior to closure of the dorsal. Most sutures follow the proper order of ossification. Sutures in female specimens seem to ossify faster, suggesting that female dolphins end their physical growth at an earlier age than males.

• Keywords: Tursiops truncatus; lubanja; spojevi glave; suturae capitis; sraštavanje
• Keywords (english): Tursiops truncatus; skull; joints of the head; suturae capitis; ossification
• Language: croatian
• URN:NBN: urn:nbn:hr:178:070290
• 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: 2020-12-09 17:30:26