Brzina zagrijavanja zidne gušterice (Podarcis muralis) i mrkog guštera (Algyroides nigropunctatus) u laboratorijskim uvjetima

master's thesis

• Title (english): Heating rate of the wall lizard (Podarcis muralis) and the blue-throated keeled lizard (Algyroides nigropunctatus) in laboratory conditions
• Author: Ana Glavina
• Mentor: Duje Lisičić (mentor)
• Committee member: Duje Lisičić (predsjednik povjerenstva)
• Committee member: Petar Kružić (član povjerenstva)
• Committee member: Neven Bočić (član povjerenstva)
• Committee member: Kristina Pikelj (član povjerenstva)
• Committee member: Ivan Čanjevac (član povjerenstva)
• Granter: University of Zagreb; Faculty of Science; (Department of Biology); Zagreb
• Defense date and country: 2023-09-28, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Biology

Abstract

Gušteri su ektotermni organizmi čija tjelesna temperatura ovisi o vanjskim izvorima
topline. Termoregulacija kod guštera uključuje kombinaciju fizioloških i bihevioralnih
mehanizama, a relativni doprinos tih mehanizama varira. Regulacija brzine apsorpcije topline
iz okoline ovisi o različitim čimbenicima, kao što su veličina i oblik tijela, površina izložena
sunčevom zračenju te boja i tekstura kože. Zidna gušterica (Podarcis muralis Laurenti, 1768)
je vrsta guštera koja preferira topla staništa te se obično nalazi na strmim liticama, krhotinama
i kamenim zidovima sa vegetacijom. S druge strane, mrki gušter (Algyroides nigropunctatus
Duméril & Bibron, 1839) preferira sunčana područja, često se nalazeći u sjenovitim ili
polusjenovitim područjima s degradiranom vegetacijom. S obzirom da ove dvije vrste guštera
preferiraju slična staništa te imaju slično obojenje tijela, cilj je istražiti utjecaj različite teksture
kože na brzinu zagrijavanja. Statistička obrada podataka uključivala je modeliranje pomoću
Gompertzove krivulje te sam za svakog guštera dobila procjenu parametara teorijske
maksimalne temperature (a), vremena najveće promjene temperature (b) i brzine zagrijavanja
(c). Dobiveni rezultati ukazuju da sama tekstura kože nema utjecaj na brzinu zagrijavanja, već
da na brzinu zagrijavanja vjerojatno utječe kombinacija morfoloških, fizioloških i bihevioralnih
čimbenika.

Abstract (english)

Lizards are ectothermic organisms whose body temperature depends on external heat sources.
Thermoregulation in lizards involves a combination of physiological and behavioral
mechanisms, and the relative contribution of these mechanisms varies. The rate of heat
absorption from the environment depends on various factors, such as body size and shape, the
area exposed to solar radiation, and the color and texture of the skin. The wall lizard
(Podarcis muralis Laurenti, 1768) is a species of lizard that prefers warm habitats and is
usually found on steep cliffs, scree, and stone walls covered with vegetation. On the other
hand, the blue-throated keeled lizard (Algyroides nigropunctatus Duméril & Bibron, 1839)
prefers sunny areas, often found in shady or semi-shady areas with degraded vegetation.
Given that these two species of lizards prefer similar habitats and have similar body
coloration, the aim is to investigate the impact of different skin textures on the rate of
warming. Statistical data analysis involved modeling using the Gompertz curve, and for each
lizard, I obtained estimates of the theoretical maximum temperature (a), the time of greatest
temperature change (b), and the rate of warming (c). The results obtained indicate that the
skin structure itself does not affect the rate of warming, but rather the rate of warming is
probably affected by a combination of morphological, physiological, and behavioral factors.

• Keywords: ektotermni; termoregulacija; Gompertzova krivulja; tekstura; brzina zagrijavanja
• Keywords (english): ectothermic; thermoregulation; Gompertz curve; texture; heating rate
• Language: croatian
• URN:NBN: urn:nbn:hr:217:387277
• Study programme: Title: Enviromental Sciences; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra struke znanosti o okolišu (magistar/magistra struke znanosti o okolišu)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Embargoed access; Embargo expiration date: 2025-09-28
• Created on: 2023-10-16 11:02:52