نتایج جستجو برای: broiler breeder males
تعداد نتایج: 140993 فیلتر نتایج به سال:
Gossypol, a natural component of cottonseed meal, exists in positive (+) or negative (-) enantiomeric forms, and their levels and ratio could be altered by developing new genetic strains of cotton. Two experiments were conducted to determine the relative toxicity of the individual gossypol enantiomers in laying and broiler breeder hens. In the first experiment, 25 individually caged Hy-Line W-3...
The purpose of this study was to investigate the biological and genetic characterization of persistent Salmonella isolates in an integrated broiler chicken operation, in an attempt to elucidate the source of contamination. From the breeder farm, the hatchery, the broiler farm and the chicken slaughter house of an integrated broiler chicken operation, a total of 6 serotypes were observed. Althou...
We tested whether subordinate helper males of the Lake Tanganyika cooperatively breeding cichlid Neolamprologus pulcher show elevated excretion levels of the stress hormone cortisol and reduced levels of 11-ketotestosterone and testosterone when living in groups with a small breeder male, compared to similar helper males living in groups with a large breeder male, in a full-factorial repeated m...
In the current study, commercial broiler breeder hens were mated with either commercial broiler breeder males (B/B) or artificially inseminated with semen from Leghorn cockerels (B/L). Embryos and chicks from each mating were used to study the effects of paternal genotype on breast muscle myosin expression without the confounding effects of differences in egg size and embryo development due to ...
Current commercial broiler products are derived from the crosses of various strains at the primary breeder level. This study investigated chick development, yolk utilization, and early growth rate of males from 8 broiler breeder strains. These strains were a combination of both specialized and commercial-line products. At hatch, 110 male chicks per strain were weighed and wing-banded, and chick...
The Effect of Different Sources Selenium and Microencapsulation on Fertility Hatching Traits in Arbor Acres Broiler Breeder
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