Hens were artificially inseminated at 8:00 a.m., 4:00 p.m.
and 11:50 p.m. Fertility was found to be significantly lower after
8:00 a.m. inseminations than after 4:00 p.m. or 11:50 p.m. inseminations
for 2 to 6 days, 2 to 9 days and 10 to 17 days following inseminations.
Slightly higher fertility...
The Oregon State University Production Line of Single
Comb White Leghorns was under selection for increased henhoused
egg production from 1947 through 1972. Since henhoused
egg production is directly related to mortality,
mortality would be expected to decrease over the years if
selection was effective. To determine if the mortality...
To observe the effects of oviposition as related to time of insemination
on fertility, four trials were conducted in which individually
caged White Leghorn hens were artificially inseminated with 0.05 cc
of undiluted mixed semen obtained from 4 to 5 cockerels. These inseminations
were made at 9:45 a.m. , 10:00...
This thesis describes a control tool for managers of a
Broiler Breeder Farm, a farm which raises chickens for the purpose
of fertile egg production. It presents the development of
a simulation of a Broiler Breeder Farm which uses a deterministic
step by step process to generate expected values of...
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...
Two lots of six White Leghorn male chickens were fed diets containing
7.3% linoleic acid and either .075% ethoxyquin (lot 1) or 32.4
mg/kg of added vitamin E (lot II) for 47 weeks both of which were
designated as positive controls. A third group (lot III) containing 30
males received...
The objectives in these four experiments were to observe
the effectiveness of sodium bisulfate and clinoptilolite and
different methods of application of sodium bisulfate, ferrous
sulfate heptahydrate and Micro Aide® on atmospheric ammonia
level in the broiler house and on broiler performance.
The first experiment was conducted to determine the...
Published March 2004. Reviewed July 2014. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog