Fish-bullies synchronized gene expression in the brain

Scientists have found that a pair of fighting fish during the fight sinhroniziruete movement, and each pair of opponents may be your “style” of wrestling. In addition, for hour fight rivals synchronizes gene expression in the brain: the transcription of genes associated with neuronal activity, ion transport, functioning of synapses, learning and memory, is similar in a pair, but differs from other fighting fish. The authors of an article published in the journal PLoS Genetics, I believe that the same transcription may underlie behavioral synchronization, and to be a universal phenomenon in social interactions.

Resource allocation many of the animals are fighting individual that wins the fight, gets, for example, extraction, territory or partner. Often the fight is not bring about bloodshed, but only exchanged the ritual movements: opponents define who from them is stronger, not causing each other real harm. Behavioral characteristics of fighting a variety of animals and know quite a lot, but about what happens during intraspecific battles at the molecular level, little is known. For example, it is unclear whether the synchronized gene transcription and the activity of neurons in individuals who are involved in a fight, although known synchronization at the neural level in the interaction of bats and rodents.

Scientists from Taiwan, Saudi Arabia, the US and Japan under the leadership of Norihiro Okada (Norihiro Okada) from the University of Kitasato have studied the fighting fighting fish (Betta splendens). 17 pairs of males were placed in separate aquariums and let them fight for hours. It turned out that the fight always happens on the same plan: the fish come up to the surface to breathe air, then actively fight (attack and bite each other) and then stick your mouths for a minute and a half. Such cycles of struggle constantly repeated, an average of 12 times per hour. The researchers analyzed the frequency and duration of all three types of events, fights, and found that each pair of fighters pattern of your contractions, different from the others and repeat.

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