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Påverkar revirets storlek hanens reproduktiva framgång hos lövsångare?
Karlstad University, Faculty of Health, Science and Technology (starting 2013).
2016 (Swedish)Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesisAlternative title
Does territory size affect male reproductive success in Willow Warblers? (English)
Abstract [sv]

Syftet med den här studien var att undersöka om revirstorleken påverkar den reproduktiva framgången hos lövsångarhanar. Datan samlades in i södra Sverige mellan 1984 och 1988 och består av etableringsdatum av revir, revirstorlek, antal partners (en eller ingen), datum för parning, antal ägg i kullen och antal flygga ungar. Det fanns inget samband mellan revirets storlek och de olika variablerna. Inte heller fanns det något samband mellan revirstorlek och hanens ålder när samma individ följdes över tid. Det fanns inget samband mellan revirstorlek och huruvida hanarna parades eller inte. Sammanfattningsvis påverkar inte revirstorleken hanens reproduktiva framgång. Istället finns det andra faktorer som troligtvis påverkar, som revirets kvalitet (t.ex. föda och predatorskydd), hanens ankomsttid, hanens sångrepertoar, hanens ålder samt föräldrarnas kondition.

Abstract [en]

The aim of this study was to examine if territory size of Willow Warbler males affects reproductive success. The data were collected in the south of Sweden between 1984 and 1988 and consist of date of establishing territory, territory size, number of partners (one or none), date of pairing, number of laid eggs and number of fledglings. There were no relationships between territory size and the different variables, nor was there a relationship between age of the male and territory size when following the same individual over time. There was also no relationship between territory size and whether or not the males reproduced or not. In summary, I could find no relationship between territory size and male reproductive success. Instead, other factors are likely to affect reproductive success, such as territory quality (i.e., abundance of food, safety from predation), male time of arrival, male song repertoire, male age and the body condition of the male and his partner.

Place, publisher, year, edition, pages
2016. , 12 p.
Keyword [en]
willow warbler territory size reprouctive success
Keyword [sv]
lövsångare revirstorlek reproduktionsframgång
National Category
Biological Sciences
URN: urn:nbn:se:kau:diva-41934OAI: diva2:923800
Subject / course
Educational program
Biology programme, 180 hp
Available from: 2016-05-02 Created: 2016-04-27 Last updated: 2016-05-02Bibliographically approved

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Faculty of Health, Science and Technology (starting 2013)
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