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Nuthatch Sitta europaea Demography, Beech Mast, and Territoriality
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Nuthatch Sitta europaea Demography, Beech Mast, and Territoriality

Author: Erik Matthysen
Edition/Format: Article Article : English
Publication:Ornis Scandinavica (Scandinavian Journal of Ornithology) v20 n4 (19891201): 278-282
Summary:
Population size, local survival and territoriality of Nuthatches were studied in two years with and two years without beech mast, with additional data from a fifth year with presumably no mast. Population size was not larger in summers preceding autumns with beech mast than in summers followed by no mast. Local survival in autumn was higher in beech mast years for juveniles, but not for adults, and the effect of  Read more...
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Document Type: Article
All Authors / Contributors: Erik Matthysen
ISSN:0030-5693
Language Note: English
Unique Identifier: 5550349220
Awards:

Abstract:

Population size, local survival and territoriality of Nuthatches were studied in two years with and two years without beech mast, with additional data from a fifth year with presumably no mast. Population size was not larger in summers preceding autumns with beech mast than in summers followed by no mast. Local survival in autumn was higher in beech mast years for juveniles, but not for adults, and the effect of beech mast was more pronounced in juveniles occupying territories with beeches. Local winter survival was not higher in years with than in years without beech mast. The size of the autumn population seems to be adjusted to the food supply through higher rates of starvation or emigration of juveniles occupying low-quality territories in years without beech mast, and not by defence of larger territories.

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