𝔖 Bobbio Scriptorium
✦   LIBER   ✦

The welfare implications of animal breeding and breeding technologies in commercial agriculture

✍ Scribed by J.A. MacArthur Clark; M. Potter; E. Harding

Book ID
116722039
Publisher
Elsevier Science
Year
2006
Tongue
English
Weight
162 KB
Volume
103
Category
Article
ISSN
0301-6226

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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,