Published March 1914. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
Published August 1921. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
Published April 1928. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
Published June 1951. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
Hens stop laying eggs for a variety of reasons. External or internal stimuli affect hormone levels, which change the condition of the ovary and oviduct, the organs responsible for egg production. The result of these changes is the reduction or cessation of egg production. The most common stimuli that affect...
During the 21 day incubation period, the fertile egg provides nutrients such as fatty acids for energy and polyunsaturated fatty acids (PUFA) for membrane synthesis to the developing chick. The hypothesis tested in the present study is that the type of PUFA fed to the breeder hen can alter tissue...
The records of a population of sex-linked dwarf layers
at the Oregon State Agricultural Experiment Station subjected
to an accelerated selection for hen-housed egg production at
40 weeks of age for a period of over 11 years were analyzed
for selection response, and for the estimation of genetic
parameters. The...
The records of a population of White Leghorns at the Oregon
State Agricultural Experiment Station, submitted to accelerated
selection for hen-housed egg production on an individual and a family
basis at 40 weeks of age for 18 years, were studied. An analysis
was made to determine the relative efficiency of...