Usporedba aktivnosti crvenokljune čigre (Sterna hirundo) tijekom gniježđenja na slatkovodnim i morskim staništima

master's thesis

• Title (english): Activity comparison of the common tern (Sterna hirundo) during nesting in freshwater and marine habitats
• Author: Matija Vodopija
• Mentor: Jelena Kralj (mentor)
• Committee member: Jelena Kralj (predsjednik povjerenstva)
• Committee member: Ivana Maguire (član povjerenstva)
• Committee member: Duje Lisičić (član povjerenstva)
• Committee member: Sandra Hudina (član povjerenstva)
• Granter: University of Zagreb; Faculty of Science; (Department of Biology); Zagreb
• Defense date and country: 2024-02-26, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Biology

Abstract

Crvenokljune čigre (Sterna hirundo) su morske ptice koje se kolonijalno gnijezde na morskim i slatkovodnim staništima. U inkubaciji i podizanju mladunaca sudjeluju oba roditelja. U svrhu istraživanja dinamike ponašanja na gnijezdima crvenokljunih čigri različitih staništa prikupljene su serije fotografija načinjene fotozamkama smještenim na tri kolonije: dvije slatkovodne i jednoj morskoj. Fotografije sa sedam gnijezda sortirane su temeljem stanja SJEDI, PORED i NEMA temeljenih na položaju ptice na gnijezdu. Izračunato je dnevno trajanje svakog stanja, trajanje stanja do promjene i ukupni broja promjena, a analiza je napravljena i za dijelove dana. Analiza je provedena u programskom jeziku R koristeći se neparametrijskim statističkim testovima. Utvrđena je značajnu razlika u vremenu provedenom na gnijezdu među gnijezdima unutar istog, ali i među različitim tipovima staništa. Ptice na gnijezdima slatkovodnih kolonija značajno su više vremena provodile inkubirajući, dok su ptice na morskim kolonijama značajno više vremena bile odsutne, što se povezuje s lakše dostupnim izvorima hrane na slatkovodnim staništima. Predacija, intraspecijsko antagonističko ponašanje, iskustvo jedinki u gniježđenju i meteorološki uvjeti mogući su dodatni utjecaji na vrijeme provedeno u inkubaciji.

Abstract (english)

The common tern (Sterna hirundo), nests colonially on both marine and freshwater habitats with incubation and chick rearing being shared parental responsibilities. In order to research the dynamics of incubation behaviour in this species, series of camera trap photographs taken between May 2021 and May 2023 were collected from three different colonies, one of which was from a marine and the two from freshwater habitats. Photographs of seven nests were sorted into three states (incubating, near nest and not present) for which the state duration per day, the state duration until change and the number of state changes were calculated. The same calculations were repeated for different times of day. Nonparametric statistical tests were conducted using the R programming language. Incubation times differed significantly among nests from the same and different habitats. Individuals on freshwater colonies spent a significantly longer time incubating, while birds from the marine habitat spent a longer time away from nest, both of which can be related to more predictable prey availability at freshwater sites. Predation, conspecific antagonistic behaviour, breeding experience and meteorological conditions are additional factors affecting incubation activity for this species.

• Keywords: Laridae; fotozamke; dnevna dinamika; inkubacija; hranjenje
• Keywords (english): Laridae; camera traps; daily dynamic; incubation; feeding
• Language: croatian
• URN:NBN: urn:nbn:hr:217:230437
• Project: Number: IP-2020-02-8793; Title: Kopno ili more: ekološki i genetički aspekti izbora staništa crvenokljune čigre; Title: Land or sea: ecological and genetic aspects of habitat choice in the Common Tern; Acronym: KiM: ČIGRE; Leader: Jelena Kralj; Jurisdiction: Croatia; Funder: HRZZ; Funding stream: IP
• Study programme: Title: Experimental Biology-University graduate programme; Study programme type: university; Study level: graduate; Academic / professional title: sveučilišni/a magistar/magistra eksperimentalne biologije (sveučilišni/a magistar/magistra eksperimentalne biologije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Embargoed access; Embargo expiration date: 2025-02-26
• Created on: 2024-03-08 09:49:53