Thursday, January 24, 2013

Conservation in New Zealand

Read this article, and then answer the following questions.



1) Why is Gareth Morgan suggesting a move toward a ban of cats in New Zealand, and do you think a move like this is justified?

2) According to Bruce Kornreich, what would be the unintended effects of the removal of house cats from the ecosystem? 

11 comments:

  1. 1. Morgan suggests a move towards a ban on cats in New Zealand because cats are invasive species that feed on native birds and are causing their populations to decrease dramatically. I think that this move is a little extreme, but I think regulations could be put in to prevent cats from doing so much damage to bird populations in New Zealand.

    2.Bruce Kornreich says that removing cats could have unintended side effects for birds. Some studies have shown that birds are much more adaptable to predation than what was initially thought about them. In some cases feline predation may impart a survival advantage to native bird populations by controlling rodent or other potential predator populations, for example. This means that by removing cats, you would essentially would be causing rodent populations to increase.

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  2. he suggests this move becasue he believes that the cats are the main reason that native bird species such as the kiwi are dying. he says that they are invasive, and actions should be taken to ban them in order to protect the kiwi.

    the unintended side effects may include that the cats help control other potential predators. this helps control the population. without cats, there would be more predators such as rodents.

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  3. 1. Gareth Morgan is suggesting a move toward a ban of cats in New Zealand because they are considered an invasive species and they prey on and reduce the population of birds. I do think that this move would be justified if the bird populations became endangered. In my opinion, the bird population in New Zealand would rise and could wipe out other species such as snakes and rats if it weren't for cats.

    2. According to Bruce Kornreich, the unintended effects of the removal of house cats from the ecosystem could lead to a decrease in rodents and snakes because the bird populations will increase without cat predators.

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  4. 1. He is suggesting that cats get banned because they are predators to both birds, and to the rodents, which are their food, saying that cats are causing threats to vulnerable, migratory birds. I don't agree with this because if bird populations are left unchecked, there could be a massive imbalance in the populations of animals that are prey to the birds.

    2. It would lead to an unintended increase in bird populations, which could lead to a vast decrease in rodent populations, because the birds would be getting hunted less, which would lead to more surviving, which would cause more rodents to be eaten.

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  5. He suggest that they should go for the banishment of cats this is because they are causing a drop in the bird population. Though the birds can adapt this type of adaption will take years especially sense cats are the invasive species on the island. I do think this would be an good idea because the may contain birds found nowhere else and the invasion of the cats can cause extinction.

    2) this would lead to an accidental increase to the bird population, and am decrease in rodent population because they would need to survive on them

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  6. 1. Gareth Morgan suggests to get rid of cats in New Zealand because he claims that they are "natural born killers," and believes that with the lack of cats on the island, there will be an increase in endemic bird population (because the cats prey on these native birds). I believe that this proposition is a little extreme, so instead of completely banning cats from the island, it might be a better idea to control the actions of the cat- like the article said, by adding some sort of bell on the cat's collar, that way prey might hear the cat and run/fly away and prevent itself from being eaten.

    2. Bruce Kornreich says that removing cats from the island may have some unintended side effects- although it would cause an increase in the bird population, but it would also cause the rodent population to drop since rodents prey off cats. Cats are a keystone species, in that if they get eliminated from the island, it will have a domino affect and can end up negatively affecting many other species on the island.

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  7. 1. Gareth Morgan is suggesting a move towards a ban of cats in New Zealand to try to take away some threat to their native bird species. I don't believe that asking cat owners to have their cats be indoor cats, but asking that they don't replace their cats after their first one dies is a bit extreme in my eyes.

    2. Bruce Kornreich believes that the unintended effect of removing house cats from the ecosystem would be an increase in the bird population and a decrease in their prey populations (ex: rodents).

    According to Bruce Kornreich, what would be the unintended effects of the removal of house cats from the ecosystem?

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  8. 1. Gareth Morgan is suggesting a move towards a ban of cats in New Zealand because they prey on native birds and are considered an invasive species on the island country. Research shows that 80 percent of gray catbirds were killed by predators before reaching adulthood, and nearly half of those deaths were caused by cats. The American Bird Conservancy (ABC) estimates that more than 500 million bird deaths in the United States can be attributed to cats, both pets and strays.
    I think a move like is is reasonable but too drastic. There are cat-lovers, just as there are dog-lovers and even though I personally don't like cats, if someone told me that when my dog dies, I should not replace it, I would be angry. To an extent, cats are threatening the survival of birds, but instead of taking away cats or plainly warning cat owners, I agree that cats should stay indoors just like how dogs should be kept on a leash.

    2. According to Bruce Kornreich, the unintended effects of the removal of house cats from the ecosystem would be an increase in bird population and their prey. This because, if cats aren't killing the rodents, then the birds (hawks, owls and eagle) would have more to eat for themselves.

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  9. 1- Gareth Morgan is suggesting a move toward a ban of cats in New Zealand to protect bird species, endangered by the presence of cats. The cats' presence has resulted in a decrease in the bird population. I believe it is a little bit extreme to want to ban all cats (and impossible) but that if felt necessary (which is Morgan's case), something could be done to prevent bird species from decreasing.

    2- According to Bruce Kornreich, the unintended effects of the removal of house cats from the ecosystem would be, yes an increase in the bird population, but a decrease in their prey populations, as they feed off cats.

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  10. 1. Gareth Morgan is moving toward a "cat free paradise" because cats prey on the native species of birds. Cats have become an invasive species in New Zealand and they are affecting the endemic species of birds. I think that a cat free country is extreme and not needed. Possibly a few more regulations and standards on cats and cat owners are required to make a species last.

    2. Korneich suggest that an unintended effect could be that cats can control the animals and rodents that prey on birds and could possibly help the survival of some species.

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  11. 1. Morgan suggests controlling cat populations in New Zealand because the cats are killing too many vulnerable species of birds. His options include keeping them indoors, not replacing pets when they die off, and in some cases euthanasia. SInce cats seem to be upsetting the ecosystem with their predatory behavior, it may be reasonable to require pet owners better control their cats.
    2. The removal of cats from the balance of nature in New Zealand may result in increases in rodents, lizard, and snakes. Felines control of these undesirables actually helps indigenous bird so reducing cats may not be such a benefit. Unchecked populations of rodents lizards and snakes may result in increased diseases and other unintended consequences.

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