For me, I love Dark Brahmas and Silkies/Frizzles. We love the large size of the Brahmas and also their gentleness. Steve would often walk around the farm with Ben, our Rooster, tucked under his arm getting petted. I'm not sure it did much for his reputation with the other chickens but Steve sure loved him. And 80% of the chicks we hatched were his offspring, so he can't have been doing too badly.
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Here's a copy of a story features on the BBC world news online for Sept 6th. I've been debating about posting it so up till now I didn't. Instead, I've decided in the interest of general interest and education to post his with a disclaimer:
This research is not my own, but the work of the BBC. While I have verified that the information is certainly plausible and was what I already knew about chicken reproduction, it is still not backed up by any sources that I can conclusively verify or any research data.
It is of a technical nature and may be unsuitable for children under 12, unless they already live on a farm and are comfortable and familiar with the general process of reproduction. In which case they won't care about this anyways because it's something they see all the time and could care less about.
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I just thought that it was interesting because given our experience with chickens running free with multiple roosters, there were always a huge number of chicks with Ben, our big Dark Brahma as their father and not many belonging to the other roosters. Now I know why...
Hens evolve secret sex strategy
By Matt McGrath Science reporter, BBC World Service
Chicken Chickens have evolved the ability to eject the sperm of unsuitable mates
Scientists have discovered that female chickens have a remarkable ability to choose the father of their eggs.
Wily hens have evolved the ability to eject the sperm of unsuitable mates say researchers working with Swedish birds.
Promiscuous roosters try to ensure that their genes are passed on by mating with as many females as possible.
But by removing the genetic material of males they consider socially inferior, the hens have managed to retain control of paternity.
Many species ranging from zebras to insects use the strategy of sperm ejection - but the evolutionary ideas behind it are often uncertain.
Among birds, male Dunnocks force females to eject the sperm of other suitors in order to protect their own genes.
But this research indicates that among chickens the battle of the sexes seems to be all about female empowerment.
Working with feral fowl in Sweden, the scientists found that many matings were forced, as the roosters are twice the size of the hens.
To cope with the unwanted attention, females have evolved the ability to remove the ejaculate of those males they consider undesirable.
Dr Rebecca Dean from Oxford University carried out the study. She said: "It's really important for females to have the best male sperm to fertilise her eggs so if she can't choose before copulation then having a mechanism to choose after copulation could really increase her evolutionary fitness."
Even when unforced, the females still exercised their right to choose by opting to eject the sperm of males they considered to be at the bottom of the pecking order.
With the reproductive odds stacked against them these low status roosters have fought back by developing larger ejaculates in the hope of increasing their chances of passing on their genes.
Chickens Hens eject more sperm from socially subordinate males
But according to Dr Dean, the shrewd females have worked out a way of dealing with this tactic as well.
"We found that hens will eject a greater proportion of the ejaculate from socially subordinate males, so she is in this way favouring the dominant males both before and after ejaculation," she said.
The scientists explain that domestic fowl would certainly use a similar tactic, but normally they have fewer mating choices than their wild Swedish cousins.
The research has been published in the journal American Naturalist.
Wow, interestingread!
ReplyDeleteSide note, seems i can comment from my tablet, but not from my laptop. Weird
when raising chicks, did you ever use a incubator? Or just broody hens? Also, can you give some info on sticking the duck eggs under the hen?
Cheers
nick