By using a technique that previously demonstrated improved efficiency of intact crop removal for broilers, experiments were conducted to determine the effectiveness of the technique in 40and 41-wk-old broiler breeder roosters and hens. The technique involved (after scalding, defeathering, and head removal) separating (breaking) the neck from the carcass parallel with the shoulders and leaving t...

because of a paucity of information on the effect of satureja khuzistanica in male chickens, this study was undertaken to determine the influence of dietary s. khuzistanica powder (skp) on seminal characteristics and testes thiobarbituric acid reactive substances (tbars) content in iranian native breeder rooster. thirty-six 40-week-old roosters were randomly allotted to 3 equal groups and recei...

BACKGROUND Polyunsaturated fatty acids (PUFAs) are necessary for the body's metabolism, growth and development. Although PUFAs play an important role in the regulation of reproduction, their role in testis development in the rooster is unknown. The present study was conducted to investigate the effects of omega-3/omega-6 (n-3/n-6, PUFAs) ratios on reproductive performance in young breeder roost...

The continuous improvement of quality of animal products and the animals themselves is one of the responsibilities we share as geneticists. As increases in human populations increase worldwide, the pressure to increase production of foodstuffs becomes more and more intense. Most notably, we have focused a tremendous effort at improving production of domestic animals. Among the meat-animal speci...

It has been demonstrated that horizontal and vertical transmission of Salmonella and Campylobacter can occur in broiler breeder flocks. The mechanism of this transmission is still unclear. Previously negative broiler breeder flocks have been reported to become positive with Salmonella, Campylobacter, or both after the introduction of "spike" roosters at 45 wk of age. To determine whether the ro...

rooster`s eye has been used a lot in shahnameh and other contexts. poets and authors, following their ancestors, have talked about it as a symbol of beautification, purity, and redness however rooster`s eye doesn’t have any of these features, nor are these features important enough to be noticed by poets. researchers have mentioned some opinions to match these features with rooster`s eye, and...

Composition and thermotropic phase behavior of sperm membrane lipids from species ranging in sensitivity to cold shock were determined. Lipids from whole sperm and sperm plasma membrane were fractionated into neutral lipid, glycolipid, and phospholipid fractions. Compositional analyses were completed for free sterols, phospholipids and phospholipid-bound fatty acids. Phase transition temperatur...