Urban rats prefer a permanent residence


26/05/2009

In today’s hectic world of rampant one thing is certain: there is no place like home. A recent study published in the journal Molecular Ecology, found that this opinion is shared by urban rats.

Although rodents of the central districts of large cities are amateurs to travel, yet the majority of rats create a separate "settlement", which carried out most of the life.

Like any major city, Baltimore (USA, Maryland) is divided into multiple regions, each of which is unique and attractive. But scientists from the University of Health "Bloomberg" by John Hopkins (Johns Hopkins Bloomberg School of Public Health) argue that people - not only the residents of Baltimore, which can fall in love with a particular area of the city and spend most of it in life.

The researchers found that in typical urban rats are kept close to home, rarely risking distance themselves further than a quarter. In the face of danger, however, some rodents can travel a distance of more than 10 kilometers to re-settle in the free territories.

Gray rat, also known as port rats can reach pound weight and carry a lot of diseases that are dangerous to humans. Despite the large sums of money from the government for the destruction of rats, the last 50 years, the number of rats in Baltimore remains unchanged. Stakeholders such a disappointing statistics, researchers have caught 300 rats from 11 residential areas of Baltimore and conducted genetic studies to determine kinship rats from different parts of the city.

Scientists found that rats from East Baltimore are separated from their unrelated "colleagues" from the western part of the city a large channel known as the Jones Falls. Within these areas the rat families form smaller communities, each holding approximately 11 st city blocks. Each community in turn is divided into villages, each of which covers a little more than a small alley. It is a place for the urban rat is the most favorite place in the world - her home.

The study puts forward some suggestions concerning rodent control. Taking into account the fact that rats rarely migrate efforts to destroy local communities can cause the opposite effect, stimulating the rodents to be occupied in other places, spreading the disease to other areas. Scientists say that if and to engage seriously deratting, it should be taken for the destruction of rats are much larger - to destroy the rats with their families. Interesting news, science and tehnikitolko on pages of our portal.

Original: Physorg.com


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