Rat Observations are in New York City
Fatih Akas / Anadolu / Getty Images
It has been planned for a long time Many plague species will move forward in heating the planet – And now the study of 16 main cities has been found that rat populations are becoming increasingly fast Average temperatures are rising fastest.
It is very difficult to calculate the number of rats in a city, so Jonathan Richardson At Richmond University Virginia and his colleagues did not try that. Instead, the population achieved the meaning of changing the number of complaints about rats recorded by cities.
In the US, this information is available publicly and the Group also received data from outside the US to contact the city officials. Researchers only entered their research if the city had not been available for at least seven years and the collection methods were not changed. This left the data for 13 city cities, as well as Tokyo, Amsterdam and Toronto.
Their analyzes are stable in Orleans in New Orleans, Louisville, Luisville, Kentucky and Tokyo. Amsterdam.
Richardson and his colleagues looked at several factors that can explain trends. They found the strongest link Average temperature has risen in the last century. The next strongest link was with urbanization, evaluated from satellite photographs, and then the density of man’s population. The city’s GDP did not show links with rats trends.
Of course in colder cities, rat numbers fall in winter and summer peaks, so it makes sense The temperature rises Populations are rising, the researchers say. More rats has a greater risk of people who have suffered rats, such as leptospirosis, also known as Weil’s disease.
The findings show that cities need to control the populations of rats while heating the planets, and cutting food supply is the most important measure, says Richardson.
“Securing food waste and make the rats inaccessible, the approach to control rats will have the greatest impact,” he noted. “We are watching the pilot of the New York City in certain neighborhoods, finally, and is putting measurable teeth in rat numbers.”
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