Bold chickens, bigger chickens Bold chickens, bigger chickens – SOMETHING ABOUT SCIENCE

Bold chickens, bigger chickens


What happens when birds are domesticated? Study shows that domestication makes chickens larger. When selected over multiple generations for reduced fear towards humans, red junglefowls (ancestors of domestic chickens) grew faster and larger, laid larger eggs, and had more efficient metabolism than the fearful counterparts. The tamed birds had higher serotonin molecules, which are involved in fear and metabolism. Researchers concluded that domestication likely correlates to favorable traits via serotonin increase. They are now looking at genetic basis of these changes in bold, tamed fowls.

Research paper:
Is domestication driven by reduced fear of humans? Boldness, metabolism and serotonin levels in divergently selected red junglefowl (Gallus gallus)
Biology Letters (2015)

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Lynn Kimlicka

I am a scientist-turned writer and editor, who loves to read and write (more than doing experiments). I have a PhD in biochemistry and molecular biology, with a specialization in structural biology. My interests range widely, from life sciences to pop culture and arts to music. I am bilingual in English and Japanese.

2 Responses

  1. Jett says:

    McConaughey Fried Chicken~!

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