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Skärpiplärkors beteende mot inkräktare under häckningssäsongen
Karlstad University, Faculty of Social and Life Sciences.
2007 (Swedish)Independent thesis Advanced level (degree of Magister), 20 points / 30 hpStudent thesisAlternative title
Rock pipits behavior towards intruders during the breeding season (English)
Abstract [sv]

Hur beter sig skärpiplärkor (Anthus petrosus) när de försvarar reviret mot en inkräktare under häckning? Eskalerar de aggressivitet olika eller har de en gemensam strategi? Påverkas beteendet av häckningsfas? Kan använd tid säga något om motivation att försvara revir? För att besvara dessa frågor placerades en burhållen artfrände av endera kön i etablerade revir. I studien mättes ägnad tid åt olika aggressiva beteenden, vilka hade klassats och graderats beroende av styrkan i hoten. Resultatet visade att alla hanar eskalerar aggression på ett likartat sätt och ägnade i medeltal lika lång tid åt olika nivåer. Individuella skillnader förekom dock då några individer eskalerade lite snabbare men det tolkades inte som ökad motivation att försvara revir. Tiden de ägnade åt de olika nivåerna varierade inte beroende av häckningsfas.

Abstract [en]

How do rock pipits (Anthus petrosus) behave when they defend a territory against an intruder during their breeding season? Do they escalate aggression differently, or do they have a common strategy? Does breeding phase influence the behavior? May used time tell something about the motivation to defend the territory? To answer these questions a caged conspecific of either sex were placed in established territories. In the study the time was measured of each different aggressive behavior, which had been classified into levels according to the intensity of the threat. The results showed that all males escalated aggression in the same way and devoted similar lengths of time to the different levels. Some individual differences occurred as a few individuals escalated somewhat rapidly, however, this was not interpreted as increased motivation to defend the territory. The time they devoted to different levels did not vary depending on breeding phase.

Place, publisher, year, edition, pages
2007. , p. 10
Keywords [en]
Birds, territorial defence, aggressive behavior
Keywords [sv]
Fåglar, revirförsvar, aggressivt beteende
National Category
Biological Sciences
Identifiers
URN: urn:nbn:se:kau:diva-916OAI: oai:DiVA.org:kau-916DiVA, id: diva2:6671
Presentation
2007-05-24
Uppsok
bio-/geovetenskap
Supervisors
Examiners
Available from: 2007-06-08 Created: 2007-06-08

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CiteExportLink to record
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Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
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  • de-DE
  • en-GB
  • en-US
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  • nn-NO
  • nn-NB
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  • Other locale
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Output format
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