Utjecaj okolišnih faktora na rast i razvoj rogova europskog muflona (Ovis gmelini musimon Pall.)

master's thesis

• Title (english): The impact of environmental factors on the development and horn growth of the european muflon (Ovis gmelini musimon Pall.)
• Author: Nikola Budak
• Mentor: Toni Safner (mentor)
• Committee member: Toni Safner (predsjednik povjerenstva)
• Committee member: Tea Tomljanović (član povjerenstva)
• Committee member: Nikica Šprem (član povjerenstva)
• Granter: University of Zagreb; Faculty of Agriculture; (Department of Plant Breeding Genetics, Biometrics and Experimentation); Zagreb
• Defense date and country: 2017-09-27, Croatia
• Scientific / art field, discipline and subdiscipline: BIOTECHNICAL SCIENCES; Agronomy

Abstract

Na rast rogova divljih populacija goveda Bovidea mogu utjecati različiti čimbenici, a njihovom analizom se mogu dobiti važne informacije o životu jedinke i populacije. U istraživanjima opisanim u analiziranoj literaturi su se klima i okolišni faktori pokazali kao neki od značajnih faktora za rast rogova (uz veličinu populacije, trofejni lov, gustoća i omjer spolova u populaciji). Cilj ovog istraživanja je testirati može li se ovisnost godišnjeg prirasta rogova muflona (Ovis gmelini musimon Pall.) objasniti samo okolišnim faktorima (temperaturom i padalinama). U istraživanju su kao prediktori za model prirasta roga korištene minimalna i maksimalna temperatura te prosječna količina oborina za proljetni period (ožujak, travanj i svibanj). Analizirane su duljine prirasta 2. godine od ukupno 332 rogova muflona iz senjskog lovišta Sv. Juraj od 1995. - 2007. godine. Proljetna minimalna temperatura je jedini testirani okolišni faktor koji se pokazao značajnim (p=4.67%) za rast rogova muflona. Velika varijabilnost prirasta roga unutar istih kalendarskih godina, uz iste okolišne uvjete, te nedovoljan broj prediktora rasta uključenih u model, ukazuju na neadekvatnost ovakvog pojednostavnjenog modela za opis rasta rogova muflona.

Abstract (english)

Horn growth of wild populations of Bovidae, can be influenced by various factors, and their analysis can provide important information on the life history of the individual and the population. In the studies described in the analyzed literature, climate and environmental factors have been shown as important factors for horn growth (also with population size, trophy hunting, density and sex ratio in the population). The aim of this study is to test whether the dependence of annual growth of mouflon (Ovis gmelini musimon Pall.) can be explained only by environmental factors (temperature and precipitation). In this study, the minimum and maximum temperature and average rainfall for the spring period (March, April and May) were used as predictors for horn growth model. Length of the 2nd year growth of the total of 332 horns from hunting ground Sv. Juraj in Senj, from 1995 to 2007 was analyzed. The spring minimum temperature is the only tested environmental factor that proved to be significant (p = 4.67%) for horn growth. The high variability of horn growth within the same calendar years, with the same environmental conditions, and the inadequate number of growth predictors involved in the model, indicate the inadequacy of such a simplified model for describing the horn growth.

• Keywords: rogovi; muflon; prirast; temperatura; padaline
• Keywords (english): Horns; mouflon; horn growth; temperature; precipitation
• Language: croatian
• URN:NBN: urn:nbn:hr:204:873358
• Study programme: Title: Fisheries and Game Management; Study programme type: university; Study level: graduate; Academic / professional title: magistar/ magistra inženjer/inženjerka ribarstva i lovstva (magistar/ magistra inženjer/inženjerka ribarstva i lovstva)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Access restricted to students and staff of home institution
• Created on: 2017-10-27 06:35:24