The Relative Importance of Breeder Flock and Broiler Flock Factors Determining Income Over Feed Costs in Random Sample Broiler Tests
نویسندگان
چکیده
منابع مشابه
The Prevalence of Campylobacter amongst a Free-Range Broiler Breeder Flock Was Primarily Affected by Flock Age
Campylobacter successfully colonizes broiler chickens, but little is known about the longer term natural history of colonization, since most flocks are slaughtered at an immature age. In this study, the prevalence and genetic diversity of Campylobacter colonizing a single free-range broiler breeder flock was investigated over the course of a year. The age of the flock was the most important fac...
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The effect of genetic strain (Ross 308; Cobb 500) and parent flock age (Ross at 32 and 36 weeks; Cobb at 26 and 44 weeks of age) on hatchability, fertile hatchability, Egg Weight Loss (EWL) and egg break out analysis were examined. At each flock age, 300 eggs from each treatment group were incubated. Thirty eggs from each treatment group were labeled individually for the measurements of Egg Wei...
متن کاملThe long-term dynamics of Campylobacter colonizing a free-range broiler breeder flock: an observational study
A free-range broiler breeder flock was studied in order to determine the natural patterns of Campylobacter colonization over a period of 63 weeks. Campylobacter sequence types (STs) were not mutually exclusive and on average colonized only 17.7% of the birds tested at any time. Campylobacter STs typically reached a peak in prevalence upon initial detection in the flock before tailing off, altho...
متن کاملDiagnosis of Mycoplasma gallisepticum from a Broiler Breeder Flock: Comparison of Three Diagnostics Methods
NPIP-mandated serological screening of a multiplier breeder flock detected possible Mycoplasma gallisepticum (MG) exposure. The flock was quarantined and further samples including blood and choanal swabs were collected and sent to a research facility for independent testing and confirmation. Subsequent analyses included diagnosis by Serum Plate Agglutination (SPA), MG-specific Polymerase Chain ...
متن کاملOccurrence of Myelocytoma in a Broiler Flock in Tehran Province, Iran
Large creamy color livers of some chickens from a commercial broiler flock, reared in Tehran province, were noticed in a slaughter house. Myeloid leukosis (myelocytoma) characterized by presence of typical gross and microscopic lesions was diagnosed. Further studies for assessment of prevalence of this disease in broiler breeders and broilers flocks was suggested.
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ژورنال
عنوان ژورنال: Poultry Science
سال: 1962
ISSN: 0032-5791
DOI: 10.3382/ps.0411573