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Rooster sperm make hen
Campo, M. Gil, C. This study examines the effect of the presence of hens on sperm variables in Black Barred Andaluza roosters which respond well to the massage technique. Two groups of roosters were then formed to study the effect of hen presence on sperm variables at 36 weeks of age. Twenty four sperm pools were obtained over 12 weeks 12 pools from each group, each pool produced by mixing semen from 11 males for analysis. The presence of hens had no significant effect on the number of spermatozoa per ejaculate or sperm concentration.
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Hens Eject Sperm from Unwelcome Suitors
Six Things You Didn't Know About Chicken Reproduction | RealClearScience
Most backyard flock owners are looking for some level of control over the quality of their food whether it be eggs, meat, or both. A rooster gives you control over the destiny of your flock and ultimately your food. No longer are you dependent on ordering day-old chicks or hatching eggs. Remember that about half of the eggs you hatch will be roosters, so each hatch can bring some new layers along with meat for the freezer.
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Hens' sperm ejection secrets
Chickens have their own battle of the sexes, and scientists have discovered a secret strategy used by hens to control who fertilizes their eggs: After mating, hens can eject the sperm of less desirable, low-status roosters. A new study has shown that, during an average ejection, a hen jettisons 80 percent of the sperm a rooster deposits in her reproductive tract. This has a huge impact on the competition among males fighting to father her future chicks, according to study researcher Tommaso Pizzari, an evolutionary biologist and university lecturer at Oxford University in the United Kingdom. A few things to know about chicken sex : Both sexes are promiscuous, mating with multiple partners.
By Pete Wilton, Oxford University. This female counter-measure has also been found in worms, insects, and even primates. They also ejected a larger proportion of the sperm of socially subordinate males, giving more dominant males an advantage. The results show that promiscuous females can have a strong and predictable influence on the battle between sperm from rival partners. So, even in animals such as chickens - where males can force females to mate - females can nevertheless retain control over the paternity of their offspring.