The ones with the biggest brains could indeed be the fittest to survive in this world as researchers have found that in times of crisis, even fish with larger brain sizes have an advantage over their peers.
The researchers examined why investing in a larger brain might provide an evolutionary advantage to compensate for the fact that brain mass is very expensive to develop and maintain.
Electroencephalogram
An electroencephalogram (EEG) detects electrical activity in the brain using electrodes attached to the scalp.
Advertisement
"We have provided the first experimental proof that a large brain offers an evolutionary advantage," explained first author Alexander Kotrschal from the Stockholm University in Sweden.
In this study, the researchers investigated the influence of brain size in survival of guppies, a species of freshwater aquarium fish whose natural range is in the Caribbean region.
![Head Injury]( "Head Injury")
Head injury or traumatic brain injury is a leading cause of disability among children and young adults that leads to varying degrees of physical and mental stability. Fortunately, it is also one of the preventable brain disorder.
They conducted an artificial selection experiment and successfully generated large- and small-brained guppies.
The researchers released 4,800 guppies from these selection lines into large semi-natural streams, which also contained a natural predator.
About half a year later, significantly more guppies with large brains had survived.
The researchers suggested that large-brained fish have an advantage that allows them to better evade predation.
"Our findings support the hypothesis that large brains provide a survival benefit under predation pressure," co-author Dustin Penn from the University of Veterinary Medicine Vienna, Austria.
The findings appeared in the journal Ecology Letters.
Source: Medindia
Head Injury
Head injury or traumatic brain injury is a leading cause of disability among children and young adults that leads to varying degrees of physical and mental stability. Fortunately, it is also one of the preventable brain disorder.
Advertisement
They conducted an artificial selection experiment and successfully generated large- and small-brained guppies.
The researchers released 4,800 guppies from these selection lines into large semi-natural streams, which also contained a natural predator.
About half a year later, significantly more guppies with large brains had survived.
The researchers suggested that large-brained fish have an advantage that allows them to better evade predation.
"Our findings support the hypothesis that large brains provide a survival benefit under predation pressure," co-author Dustin Penn from the University of Veterinary Medicine Vienna, Austria.
The findings appeared in the journal Ecology Letters.
Source: Medindia
Neurocysticercosis
Neurocysticercosis or Cysticercosis of brain is the most common cause of epilepsy and the most common parasitic infection of the brain. Neurocysticercosis is more common in the developing countries.
Advertisement
 Brain FoodIt is a myth that the brain quits generating new cells once you reach adulthood. They are regenerating all the time. | Advertisement
|
Advertisement
Recommended Readings
Latest Research News
A latest research suggests that the quality of a person's post-work recovery in the evening can impact their mood when they resume work the next day.
Researchers are working on new strategies and solutions for sleep apnea to ward off a range of health risks including cognitive decline.
The scientists discovered that when the stem cells in the hair follicle are made softer, they have a higher chance of growing hair.
A combinatorial therapy provided promising beneficial results among people with ischemic stroke.
In Parkinson's disease patients voice disorders are quite common. A new combination therapy had greater effects on the voice.