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Parland s alligator population has been declining in recent

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Joined: 26 Dec 2015
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Location: United States (CA)
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Re: Parland s alligator population has been declining in recent [#permalink]

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New post 04 Oct 2017, 14:18
A - decline in alligator population means fishers can work in parts of lakes & rivers that were formerly too dangerous...if fishers can work in more areas of the lake, can it not be inferred that they could catch more freshwater fish? it doesn't have to be for human consumption, this could be "game fish" like swordfish, etc. This could be correct.

B - Commercial fishing enterprises increasing the # of fishing boats they use could be correct b/c commercial fishing not discussed in the passage...passage only refers to the annual # caught for human consumption.

* I don't like (D). Are these "holes" that provide a safe place for eggs to hatch the ONLY safe places for these eggs to hatch? We're told that alligators prey heavily on this species but are not told about anything else in the passage that could decrease the number of these fish.
- No talk about toxic chemicals being poured into the lake to kill the alligators or
- a virus that spread throughout the lake that kills these fish.

This question really angers me - need someone to break apart my argument here and show me how I'm incorrect.

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Re: Parland s alligator population has been declining in recent [#permalink]

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New post 11 Oct 2017, 19:45
Resolve the paradox; alligators decreased yet fish continued to decrease. Possible explanations, something else is causing the decline of the fish population or alligators benefited the fish in some way.

D follows the second train of thought.
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Re: Parland s alligator population has been declining in recent [#permalink]

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New post 14 Oct 2017, 08:43
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LakerFan24 wrote:
A - decline in alligator population means fishers can work in parts of lakes & rivers that were formerly too dangerous...if fishers can work in more areas of the lake, can it not be inferred that they could catch more freshwater fish? it doesn't have to be for human consumption, this could be "game fish" like swordfish, etc. This could be correct.

B - Commercial fishing enterprises increasing the # of fishing boats they use could be correct b/c commercial fishing not discussed in the passage...passage only refers to the annual # caught for human consumption.

* I don't like (D). Are these "holes" that provide a safe place for eggs to hatch the ONLY safe places for these eggs to hatch? We're told that alligators prey heavily on this species but are not told about anything else in the passage that could decrease the number of these fish.
- No talk about toxic chemicals being poured into the lake to kill the alligators or
- a virus that spread throughout the lake that kills these fish.

This question really angers me - need someone to break apart my argument here and show me how I'm incorrect.

This is a tough one!

The people of Parland expected that a decline in the alligator population would lead to an increase in the numbers of these fish available for human consumption. In fact, the population of this fish species has also declined, even though the annual number caught for human consumption has not increased. We need something that MOST helps to explain the decline in the fish population.

Quote:
A. The decline in the alligator population has meant that fishers can work in some parts of lakes and rivers that were formerly too dangerous.

We are already told that the annual number of fish caught for human consumption has not increased. Sure, it is technically possible that there has been an increase in sportfishing, but if the fish is highly valued for human consumption, why would sportfishing increase while catching fish for human consumption remains the same?
Also, choice (A) specifically states that "fishers can work" in areas that were formally too dangerous. The word "work" implies that we're talking about fishermen who are fishing to earn a living, not for sport. I might not eliminate choice (A) right away, but it is not a very strong explanation.

Quote:
B. Over the last few years, Parland’s commercial fishing enterprises have increased the number of fishing boats they use.

Again, this choice refers to commercial fishing, which means that the fish are sold for profit. Sure, there might be other commercial uses for the fish, but the passage specifically tells us that the fish are highly valued for human consumption. If more fish are being caught, why would the number of fish caught for human consumption not increase? As with (A), choice (B) is not a very strong explanation and accepting it would require making assumptions that go against what is strongly suggested in the passage.

Both (A) and (B) could potentially be used to explain the population decline, but we would have to make several leaps in order for either choice to work.

Quote:
D. During Parland’s dry season, holes dug by alligators remain filled with water long enough to provide a safe place for the eggs of this fish species to hatch.

Choice (D) specifically describes how would a decline in the alligator population would be detrimental to the population of the fish. Without these holes the number of safe places for the eggs to hatch would almost certainly decline. It doesn't matter whether these holes are the ONLY place for the eggs to hatch. If we significantly decrease even just one of the safe places, the fish population would LIKELY be harmed.

We do not need something that PROVES beyond a doubt that the population would decline. Yes, there could be several other explanations for why the fish population has decreased. But out of the answer choices given, choice (D) MOST helps to explain the decline in the population of the fish species.

I hope that helps!
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Re: Parland s alligator population has been declining in recent   [#permalink] 14 Oct 2017, 08:43

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