How New York City is getting rid of Rats

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Discussion Overview

The discussion revolves around methods for controlling the rat population in New York City, specifically focusing on the use of carbon monoxide to exterminate rats and the behavioral responses of other rats to dead bodies. Participants explore various chemical responses, historical extermination efforts, and the implications of these methods on both rats and humans.

Discussion Character

  • Debate/contested
  • Exploratory
  • Technical explanation

Main Points Raised

  • Some participants mention a method where carbon monoxide is used to fill rat burrows, leading to the collapse of these burrows and potentially causing other rats to avoid the area due to the smell of decaying bodies.
  • One participant humorously suggests that the rats might simply relocate to New Jersey.
  • Another participant proposes that there may be specific chemicals that could trigger avoidance behavior in rats, referencing substances like cadaverine and suggesting that further behavioral studies could clarify these effects.
  • A critical viewpoint expresses skepticism about the effectiveness of current extermination methods, citing the extensive sewer system in NYC and the potential dangers of using carbon monoxide, which is odorless and harmful to humans and pets.
  • This participant also discusses the potential health hazards posed by decomposing rat bodies and the ineffectiveness of various natural deterrents like eucalyptus and peppermint.
  • Concerns are raised about the ethics of trapping and relocating rats, with arguments that such methods may not be humane and could lead to suffering for the animals involved.

Areas of Agreement / Disagreement

Participants express a range of opinions, with some supporting the carbon monoxide method and others questioning its safety and effectiveness. There is no consensus on the best approach to rat control, and multiple competing views remain regarding the implications of these methods.

Contextual Notes

Limitations include the lack of empirical evidence supporting the effectiveness of the proposed chemical methods and the unresolved ethical considerations surrounding the treatment of rats in extermination practices.

Tom.G
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A creative exterminator is filling their burrows with Carbon Monoxide, then collapsing the burrows. Apparently other rats can smell the decaying ones, decide they don't like the neighborhood, and either move on or don't try to homestead there.

Short article with way too many ads at:
https://www.businessinsider.com/nyc-exterminator-dead-rat-bodies-carbon-monoxide-2023-10

Cheers,
Tom
 
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Tom.G said:
Apparently other rats can smell the decaying ones, decide they don't like the neighborhood, and either move on or don't try to homestead there.
So they move to New Jersey?
 
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There probably a set of chemicals that could mediate this response.
The lab chemical catalogues already have things like cadaverine which is used to train cadaver seeking dogs.
There are other chemicals with similar effects.
The dead rat avoidance behavior could be due to a general sets of chemicals of death, or a set specific to dead rats, or they may just be more sensitive to a particular chemical in the mix.
More behavioral studies (or knowledge if the studies have already been done) could distinguish some of these alternatives.

Irregardless, it should be possible to reproduce the effect with just chemicals.
What the rats long term responses would be is not clear.
 
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Getting rid of rats in N.Y. I seriously doubt it. Getting rid of 100 nests? colour me unimpressed. They have been gassing and poisoning them for a long time. NY has an extensive sewer system that needs maintenance. Carbon monoxide is odourless and just as deadly to people, with no warning smell it would probably kill thousands, along with their pets of course which are also used as a control method.
While the smell of dead rats is terrible, apparently the rats like Eucalyptus or Peppermint even less, neither do they like the effects black pepper, cayenne pepper or ammonia on them, unfortunately none of these are totally reliable. Rats will often cannibalize dead rats or even the young of other rats, perhaps to reduce the risk of attracting predators. Most exterminators appear to think that the smell can attract other rats, a dead rat in a colony doesn't get rid of the others. They do however, quickly identify things that might be dangerous and avoid that. Leaving dead rats to decompose represents a potential health hazard to humans as well as other animals.

We have been trying to exterminate rats for centuries, they are destructive and represent a serious health hazard, we have even had humans who specialise in their eradication, and still do, using a wide range of control methods These now even include traps described as humane, the rats can be trapped alive and released some distance away. If these rats have young, these will starve or be cannibalized by others in the colony, rats released in the wild, rarely live beyond a week due to unknown predators or even other rats. This usually ensures they live that week in a state of abject terror, so it's not really humane, releasing them near human habitation could lead to prosecution. This story seems marginally less credible than the pied piper and probably is supposed to serve the same purpose, to entertain.
 
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