𝔖 Bobbio Scriptorium
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To breed or not to breed: a model of partial migration

✍ Scribed by Allison K. Shaw; Simon A. Levin


Book ID
111252415
Publisher
John Wiley and Sons
Year
2011
Tongue
English
Weight
954 KB
Volume
120
Category
Article
ISSN
0030-1299

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To breed or not to breed: causes and imp
✍ Markku Orell; Kari Koivula; Seppo RytkΓΆnen; Kimmo Lihti πŸ“‚ Article πŸ“… 1994 πŸ› Springer-Verlag 🌐 English βš– 829 KB

Causes and consequences of non-breeding in willow tits were studied in northern Finland during 1986-1992. The breeding status was sex and age biased; males and yearling birds were in excess among the non-reproducers. Due to sex bias in the population it appeared detrimental for males to lose a mate,