Utjecaj ponašanja na kompeticiju među gmazovima

undergraduate thesis

• Title (english): Behaviour influence on competition between reptiles
• Author: Lea Vodjerek
• Mentor: Duje Lisičić (mentor)
• Granter: University of Zagreb; Faculty of Science; (Department of Biology); Zagreb
• Defense date and country: 2018, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Biology

Abstract

Gmazovi su jedna od najboljih skupina životinja za proučavanje međuvrsnih i unutar vrsnih interakcija. Promatranje istih daje nam uvid u vrlo kompleksan svijet unutar kojega se svaka jedinka bori za opstanak, bilo da je riječ o prehrani ili preživljavanju. Jedinke različitih vrsta, najčešće iskorištavaju iste resurse zbog čega će doći do pojave međuvrsne kompeticije, a kao rezultat javljaju se međuvrsna agresija i kompetitivno izuzimanje. Proces kompetitivnog izuzimanja javlja se između vrsta Podarcis siculus i Podarcis melisellensis koje su došle u dodir na obali Jadranskoga mora u Hrvatskoj. Nadalje, na primjeru vrsta Podarcis melisellensis te Dalmatolacerta oxycephala prikazano je kako do međuvrsne agresije dolazi ukoliko jedinka jedne vrste uđe u teritorij druge. Velik broj životinja, uključujući i gmazove, obojenost dijelova tijela koristi kako bi upozorio i odbio moguće napadače ili predatore. Time se služi i vrsta Urosaurus ornatus čija obojenost vrata govori o agresivnosti i dominantnosti pojedine jedinke. Također, dominantnost i agresivnost, ali i veličina jedinke, ključne su u osvajanju teritorija, a eksperimentalni dokaz za to je pokus na juvenilnim jedinkama vrste Psammodromus algirus. Svi ovi primjeri ukazuju na to da je ponašanje životinja vrlo nepredvidivo i svaka jedinka reagira na opasnost na drugačiji način. Zbog toga je ishod kompetitivnih reakcija često nemoguće predvidjeti.

Abstract (english)

Reptiles are one of the best animal groups to study interspecific and intraspecific interactions. Observing them gives us an insight into a very complex world where each individual struggles for existance, whether it is nutrition or survival. Individuals of different species often use the same resources, which will cause interspecific competition, resulting in interspecific aggression and competitive exclusion. The process of competitive exclusion occurs between the species Podarcis siculus and Podarcis melisellensis that came into contact at the Adriatic coast in Croatia. Furthermore, in the example of the species Podarcis melisellensis and Dalmatolacerta oxycephala, it is shown that interspecific aggression occurs if individual of one species enters the territory of the other. A large number of animals, including reptiles, uses body colaration to warn and repel possible attackers or predators. This is also the case of Urosaurus ornatus whose neck coloring indicates the aggressiveness and dominance of an individual. Also, dominance and aggression, as well as body size, are important in the territory occupation, and experimental evidence for this is shown on juvenile speciments of the species Psammodromus algirus. All these examples suggest that animal behavior is very unpredictable and every individual responds to danger in a different way. This is why the outcome of competitive responses is often impossible to predict.

• Keywords: gmazovi; ponašanje
• Language: croatian
• URN:NBN: urn:nbn:hr:217:264318
• Study programme: Title: Ecology; Study programme type: university; Study level: undergraduate; Academic / professional title: sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) biologije (sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) biologije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2018-10-11 11:39:55