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April 23, 2008

Birds' singing in spring linked to hormones

Posted: 03:58 PM ET

As Romeo and Juliet disputed whether they heard a lark or a nightingale singing on the pomegranate tree, they probably did not ponder the biological underpinnings of why birds sing in springtime.

Scientists unlock mysteries of why birds sing.

In fact, the precise mechanisms for springtime bird singing have always been mysterious to scientists. But a recent study breaks new ground in the biology of bird songs.

A group of researchers has discovered a hormone that sets off neural activity that causes birds to sing when the days get longer. The study, led by Takashi Yoshimura of the Nagoya University, Japan, was reported in a recent issue of the journal Nature.

The scientists studied 38,000 genes of male Japanese quails under both long and short days. They found that some genes were only switched on 14 hours after dawn on the first long day.

These particular genes were found only in cells on the surface of the hypothalamus, and produced a thyroid-stimulating hormone, said Peter Sharp, a collaborator on the study at the Roslin Institute in Scotland. This hormone sets off the release of another hormone which stimulates spring breeding, he said in an e-mail.

The pituitary gland gets a boost from the hormone, pumping out other hormones that make the birds’ testes grow, the study said. This process makes birds sing.

But it’s not just our fowl friends that could benefit from this study. Human conditions such as seasonal affective disorder and poor fertility could be connected to a malfunction of the very same cells studied in the birds, Sharp said.

“Discoveries in basic biology increase the chances of developing new ways of improving animal and human well being,” he said.

–Elizabeth Landau, Associate Producer, CNN.com

Filed under: Animals • Birds


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Bob   April 25th, 2008 5:53 pm ET

It is rather amusing that the poor-quality photo chosen to accompany this article is that of either a Gambel's or California quail, neither of which sings, but merely calls. Couldn't you find a file photo of an American Robin or something?


Steve   April 29th, 2008 3:14 pm ET

Oh snap! Bob got you good SciTechBlog. What you gonna do?!


Franko   May 3rd, 2008 5:03 am ET

  
We were casually walking, then, in the middle of an overgrown road, a wild chicken looking like the one in the photo, literally tried to attack us when we disturbed her chiks.


Larian LeQuella   May 13th, 2008 5:06 pm ET

“Discoveries in basic biology increase the chances of developing new ways of improving animal and human well being,” he said.

Careful, don't let the fundies hear that! 😉


Franko   May 14th, 2008 3:54 am ET

.        
Growing ostriches the size of dinosaurs would reduce the price of Chicken Burgers, but increase the size and price of a fried wing.. Eat chicken to avoid the Mad Cow !

If a bird brained crow is so smart, could a dinosaur sized chicken do string theory ?


Science Experiments for Kids   July 10th, 2011 7:14 pm ET

Hi man,
This is an excellent post for such a hard subject to discuss.

I look forward to seeing many more excellent posts like these.

Cheers


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מוביל   April 18th, 2012 1:29 am ET

can't beleive i use to like this songg:/ its? still pretty good i gotta admit


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Personal training Long Island   January 11th, 2014 11:16 pm ET

What an awesome study! It is really great to see the human race learning everything they can about all the creatures of this planet.CNN great
story


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