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Latitudinal variation in the body-size of Sparrowhawks <i>Accipiter nisus</i> within Britain
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Latitudinal variation in the body-size of Sparrowhawks Accipiter nisus within Britain

Author: I WYLLIE Affiliation: Institute of Terrestrial Ecology, Monks Wood, Abbots Ripton, Huntingdon, Cambridgeshire PE17 2LS, UK; I NEWTON Affiliation: Institute of Terrestrial Ecology, Monks Wood, Abbots Ripton, Huntingdon, Cambridgeshire PE17 2LS, UK
Edition/Format: Article Article : English
Publication:Ibis, v136 n4 (October 1994): 434-440
Other Databases: WorldCat
Summary:
On the basis of Sparrowhawks Accipiter nisus found dead in various parts of Britain during 1979-1991. wing-length was found to provide the most reliable index of overall body-size because it gave the best and most consistent correlations with five other measures of body-size.  Read more...
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Document Type: Article
All Authors / Contributors: I WYLLIE Affiliation: Institute of Terrestrial Ecology, Monks Wood, Abbots Ripton, Huntingdon, Cambridgeshire PE17 2LS, UK; I NEWTON Affiliation: Institute of Terrestrial Ecology, Monks Wood, Abbots Ripton, Huntingdon, Cambridgeshire PE17 2LS, UK
ISSN:0019-1019
Language Note: English
Unique Identifier: 5157004662
Notes: revision accepted 29 October 1993
Number of References: 10
Awards:

Abstract:

On the basis of Sparrowhawks Accipiter nisus found dead in various parts of Britain during 1979-1991. wing-length was found to provide the most reliable index of overall body-size because it gave the best and most consistent correlations with five other measures of body-size.
A marked latitudinal trend in the body-size of Sparrowhawks was found within Britain, with birds of each sex and age group increasing in size from south to north, in line with Bergmann's Rule. For each successive degree of latitude (approximately 110 km), wing-length increased by an average of 0.86 mm in adult males and O.75 mm in adult females. No obvious west-east trend in body-size was found within Britain.

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A marked latitudinal trend in the body-size of Sparrowhawks was found within Britain, with birds of each sex and age group increasing in size from south to north, in line with Bergmann's Rule. For each successive degree of latitude (approximately 110 km), wing-length increased by an average of 0.86 mm in adult males and O.75 mm in adult females. No obvious west-east trend in body-size was found within Britain.
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