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Macro and microgeographical variations in the ‘hoot’ of Italian and English tawny owls(Strix aluco)

 

作者: PaoloR. Galeotti,   BridgetM. Appleby,   StevenM. Redpath,  

 

期刊: Italian Journal of Zoology  (Taylor Available online 1996)
卷期: Volume 63, issue 1  

页码: 57-64

 

ISSN:1125-0003

 

年代: 1996

 

DOI:10.1080/11250009609356108

 

出版商: Taylor & Francis Group

 

关键词: Strix aluco;Tawny owl;Geographical hoot variations;Italy;England;Dialects

 

数据来源: Taylor

 

摘要:

We studied the geographical variation of song in tawny owls, comparing temporal and frequency measures of the ≪hoot≫ in two races of the species (English and Italian) and in both adjacent and distant populations within each race. We found the two races differed significantly in five of the 13 parameters considered, duration of the second note, lowest frequency of the first note, and frequency modulation amplitude being the most important variables; Italian and English hoots were discriminated with a high success rate (86.7%). The seven populations also differed significantly from each other, particularly in the lowest frequency, but the overall rate of correct classification was lower (78.2%). Microgeographic variations between adjacent populations occurred in both countries: in general, the frequency measures varied through populations according to the habitat, being higher in open farmland and lower in dense woodland or urban habitats. A mosaic pattern of culturally transmitted hoot variations was therefore recognized, which might suggest the existence of dialects in the tawny owls.

 

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