Utjecaj blizine naselja na veličinu pologa i uspješnost gniježđenja čvorka (Sturnus vulgaris Linnaeus, 1758)

Jelinek, Marijana (2016) Utjecaj blizine naselja na veličinu pologa i uspješnost gniježđenja čvorka (Sturnus vulgaris Linnaeus, 1758). Diploma thesis, Faculty of Science > Department of Biology.

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Abstract

Starling (Sturnus vulgaris) is a widespread nesting bird in continental Croatia inhabiting natural and urban habitats. The aim of this study was to determine the possible impact of the proximity of the settlement to their clutch size and nesting success during two nesting periods in the spring of 2015 conducted at the Mokrice village in Hrvatsko Zagorje region and surrounding woods. The study used nests located in nesting boxes recorded. The laying date of the first egg, number of eggs, egg length and width, as well as the number of hatched offspring were recorded for each nest. Calliper was used to measure the eggs and the volume was calculated according to the Hoyt formula. The normality of the data was tested by the Shapiro - Wilk test and the statistical data were calculated using Pearson correlation and the ANOVA. A significant correlation between the success of nesting in the village and the forest was found only in the number of eggs and the number of offspring, where the forest provided higher value for both variables. No correlation between the volume of eggs and the clutch size was found which have not confirmed trade-off hypothesis of optimal clutch/egg size. A larger number of eggs and offspring and a higher breeding success recorded in the first brood confirmed earlier findings about reduced reproductive characteristics of starling later in breeding season.

Item Type: Thesis (Diploma thesis)
Keywords: Sturnus vulgaris, clutch, nesting success, habitat
Supervisor: Kralj, Jelena
Co-supervisor: Mustafić, Perica
Date: 2016
Number of Pages: 24
Subjects: NATURAL SCIENCES > Biology
Divisions: Faculty of Science > Department of Biology
Depositing User: Silvana Šehić
Date Deposited: 24 Mar 2016 23:53
Last Modified: 24 Mar 2016 23:53
URI: http://digre.pmf.unizg.hr/id/eprint/4641

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