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KOMPAS.com – Although it has long been a human food, the new rabbit became a pet in the 19th century. But in this relatively short period of time, human intervention has changed the rabbit's brain.
Charles Darwin even wrote one day that no animal is more difficult to tame than a young wild rabbit. In contrast, no more benign animals than young pet rabbits.
To find out what caused this discrepancy, the researchers studied the brains of eight wild rabbits and eight pet rabbits in the same district
Dr. Miguel Carneiro of the University of Porto, Portugal, who conducted the study, said in a previous study that we reported a genetic difference between wild and domestic rabbits, especially the domain of genes expressed as the brain grows
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"Now we have decided to use high resolution MRS to see if this genetic change is also causing changes in brain morphology (rabbit)," he said, The Independent On Wednesday (27/6/2018).
Published in the journal PNAS the researchers found something of interest. Domestic rabbits do not only have smaller brains than wild rabbits, but there is a narrowed and enlarged part.
The amygdala or part of the brain that works by fear, for example, shrinks to the brain of a domestic rabbit. Meanwhile, the medial prefrontal cortex that controls the response to fear enlarges.
Domestic rabbits also have less white matter to process information than wild rabbits
This suggests that fear of pets in the brain
The researchers themselves were not surprised by this result. They say that throughout human history, we have encouraged the evolution of animals by choosing non-aggressive and benign individuals.
This study also became the first comprehensive study linking domestication to genetic changes affecting brain shape. ! function (f, b, e, v, n, t, s) {if (f.fbq) returns; n = f.fbq = function () {n.callMethod?
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