Age-related trends in the breeding success of individual female Sparrowhawks Accipiter nisus

被引:0
|
作者
Newton, I [1 ]
Rothery, P [1 ]
机构
[1] Inst Terr Ecol, Monks Wood Expt Stn, Huntingdon PE17 2LS, England
关键词
Accipiter nisus; age; breeding success; ringing; senility; Sparrowhawk;
D O I
暂无
中图分类号
Q95 [动物学];
学科分类号
071002 ;
摘要
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 attempt is made to find to what extent this mean trend is caused by similar trends in the breeding of individual females, and to what extent to the progressive appearance and disappearance of high performing females among breeders of different ages. It is concluded that the mean trend could be attributed entirely to similar age-related trends in individual birds.
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页码:21 / 31
页数:11
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