Mar
30
2009
3

The Norway Rat

norway_rat

The New York City rat is called Rattus Norvegicus (Norway Rat) or sewer rat or water rat. It has a life span of about one year. It is 12 to 16” long including the tail. It weighs one pound. The female gives birth 5 to 8 times a year and has 6 – 12 babies or pups. The gestation period is 22 days. The rat is a burrowing, gnawing, nocturnal (night time) creature of habit. It burrows in the ground, under buildings, and in rubbish. It will travel from 100 to 150 feet from its resting place. It requires one ounce of food daily and one ounce of water. It feeds on animals and vegetables and prefers meat and fish.

Diseases caused by rats

  • Salmonellosis, Bacterial food poisoning – most common disease transmitted by rats in United States
  • Murine Typhus, Transmitted from rodent to rodent and to man by scratching infected flea feces intoskin
  • Leptospirosis, (Weil’s Disease) –Transmitted from rodent and to man by contact with infected urine
  • Plague, Highly fatal bacterial disease for mammals transmitted from field rodent to man by bites of infected fleas (Pasturella Pestis)
  • Rat Bite Fever, Bacterial disease –bite infected rat
  • Trichinosis, Endo Parasite – pork infected with parasites by ingesting rat contaminated garbage/food. Vicious cycle – rat – pig – man
  • Rabies – Non existent or reported case

Source: The City of New York Department of Housing Preservation & Development: Housing Education Program on Pest Control

Written by erika in: Rats |
Mar
30
2009
1

Rats Prefer the Grid of Manhattan

“We put rats in relatively large areas with objects and routes resembling those in Manhattan,” explains Prof. Eilam. The rats, he found, do the same things humans do: They establish a grid system to orient themselves. Using the grid, the rats covered a vast amount of territory, “seeing the sights” quickly. In contrast, rats in an irregular plan resembling New Orleans’ failed to move far from where they started and didn’t cover much territory, despite travelling the same distances as the “Manhattan rats.”

Source: Science Daily

"Rat tracks" made by rats in two city plans: Manhattan-style (left) and New Orleans-style (right). In both plans rats cover the same distance, but rats in the "Manhattan" grid cover more territory. (Credit: Tel Aviv University)

"Rat tracks" made by rats in two city plans: Manhattan-style (left) and New Orleans-style (right). In both plans rats cover the same distance, but rats in the "Manhattan" grid cover more territory. (Credit: Tel Aviv University)

Written by erika in: Rats |

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