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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.
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Chicken Reproduction – Sperm & Eggs
Hens Eject Sperm from Unwelcome Suitors | Live Science
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. Explore further. More from Biology and Medical.
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How Do Chickens Mate?
Keeping Chickens. I understand, and perhaps I misunderstand, that the sperm of the rooster is stored in the hens body until a egg passes by and then it is fertilized? So does a rooster deposit sperm that effects several eggs, or must he make a fresh deposit for each egg? A mature ovary, which looks like a cluster of grapes, may contain up to 4, small ova.
How Do Chickens Mate? Some surprising aspects of chicken mating make it possible for families to keep a few hens in suburban and urban areas and enable monstrous operations to produce commercial eggs at low cost. Huge factory egg operations are also lucky that hens lay without a rooster present.