AGE-RELATED TRENDS IN THE BREEDING SUCCESS OF INDIVIDUAL FEMALE SPARROWHAWKS ACCIPITER-NISUS

Authors
NEWTON I ROTHERY P
Citation
I. Newton et P. Rothery, AGE-RELATED TRENDS IN THE BREEDING SUCCESS OF INDIVIDUAL FEMALE SPARROWHAWKS ACCIPITER-NISUS, Ardea, 86(1), 1998, pp. 21-31
Citations number
15
Categorie Soggetti
Ornithology
Journal title
Ardea → ACNP
ISSN journal
03732266
Volume
86
Issue
1
Year of publication
1998
Pages
21 - 31
Database
ISI
SICI code
0373-2266(1998)86:1<21:ATITBS>2.0.ZU;2-V
Abstract
Overall, female Sparrowhawks improved in the mean number of young they raised per year up to the 5th year of life, and then declined. An att empt is made to find to what extent this mean trend is caused by simil ar trends in the breeding of individual females, and to what extent to the progressive appearance and disappearance of high performing femal es among breeders of different ages. It is concluded that the mean tre nd could be attributed entirely to similar age-related trends in indiv idual birds.