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In fisheries in general, when a large harvest is taken one year, there

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In fisheries in general, when a large harvest is taken one year, there [#permalink]

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In fisheries in general, when a large harvest is taken one year, there will be fewer fish available to be harvested in the following year, leading to decreasing yields of most
fish species over time. The Maine lobster is an anomaly, however. Even though the vast number of lobster traps covering the New England coast pull in more lobsters every year, the number of lobsters in the water has shown no signs of decreasing.

Which of the following, if true, most helps to explain the apparent anomaly concerning the number of Maine lobsters?

A. The decline of other fish species in the region has deprived the lobster of its natural food source of scavenged fish.
B. The bait in lobster traps provides abundant food for young lobsters, which are still small enough to swim out of the traps, leading to much higher survival rates among
young lobsters than would be expected in nature.
C. As global warming heats the waters of the Atlantic coastline, the Maine lobster has extended its northern range to well past Nova Scotia.
D. The ever-increasing demand for lobsters in seafood restaurants and steakhouses across the country has driven a corresponding increase in the supply of the product.
E. The increased lobster harvest has resulted in many juvenile lobsters but very few breeding-age lobsters, which could result in a crash in lobster numbers in the near
future.

Source: McGraw-Hills GMAT Book
[Reveal] Spoiler: OA

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Re: In fisheries in general, when a large harvest is taken one year, there [#permalink]

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Large harvest in one year results in fewer fishes that are available for harvest in the following year.
Maine Lobster does not follow the stated trend.

A. The decline of other fish species in the region has deprived the lobster of its natural food source of scavenged fish. - Incorrect. Results in a decline in lobsters.

B. The bait in lobster traps provides abundant food for young lobsters, which are still small enough to swim out of the traps, leading to much higher survival rates among young lobsters than would be expected in nature. - Correct. Helps explain why the availability of Maine Lobsters is not decreasing.

C. As global warming heats the waters of the Atlantic coastline, the Maine lobster has extended its northern range to well past Nova Scotia. - Incorrect. Out of context. Increase in range does not mean increase in number of Maine Lobsters.

D. The ever-increasing demand for lobsters in seafood restaurants and steakhouses across the country has driven a corresponding increase in the supply of the product. - Incorrect. We know that there is an increase in supply. We have to know the reason to resolve the anomaly stated in the argument. This option just provides an additional fact.

E. The increased lobster harvest has resulted in many juvenile lobsters but very few breeding-age lobsters, which could result in a crash in lobster numbers in the near future. - Incorrect. We are not worried about the future.

Answer: B
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Re: In fisheries in general, when a large harvest is taken one year, there [#permalink]

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New post 11 Feb 2017, 23:14
In option e, if there will be few breeding lobster, then population of lobsters will not decrease as breeding lobsters will give birth to young ones in near future..

so why option e is incorrect?
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In fisheries in general, when a large harvest is taken one year, there [#permalink]

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New post 12 Feb 2017, 09:15
VKat wrote:
In option e, if there will be few breeding lobster, then population of lobsters will not decrease as breeding lobsters will give birth to young ones in near future..

so why option e is incorrect?


The question is why no decrease has been observed in the number of lobsters (in recent past and present). The question has no link to whether lobster numbers will be decreased (in future). Hence option E is irrelevant.

(Note: Though this is not relevant to answering the question, I would point out the flaw in your statement; Few breeding lobster would give birth to few lobsters, implying that a crash in lobster number is eminent.)
In fisheries in general, when a large harvest is taken one year, there   [#permalink] 12 Feb 2017, 09:15
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