本题目来源于试卷: Aquatic Food Production，类别为 IB环境系统与社会
[单选题]
Figure: The Maximum sustainable yield (MSY) of fish s j)y:z-+euw (odee non4b5mjl de6 7z-1nu7f7 gq 2jpg xcn3rp2k9ky4 ck2qv-tocks.
Determine which of the points 1, 2 or 3 from the figure above represents the most sustainable harvest of fish.
A. None of the points represent a sustainable harvest of fish as they are all overfished.
B. Point 1 represents the most sustainable harvest as it is below the MSY.
C. Point 2 represents the most sustainable harvest as it is on the MSY.
D. Point 3 represents the most sustainable harvest as it is below the MSY
参考答案: B
本题详细解析:
The maximum sustainable yield is the highest amount 3bdm+zk3*o i fthat can theoretically be harvested forever without permanently depleting the fish stocks. As fishing efforts increase, we go beyond the maximum sustainable yield and towards overfishing; therefore option D is not correct. Option A is not correct, as points 1 and 2 do not correspond to overfishing. Although harvesting at the maximum sustainable yield is recommended and considered sustainable (option C) it is not the correct answer in this case. Point 1 represents the most sustainable harvest of fish stocks as it is lower than z k 3m*bfi3od+the (MSY) allowing not only for maintaining the stocks but also increasing them; therefore option B is the correct answer.
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