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  3. In the massive Zambezi River system, fish are not only vital to the ecosystem, but also a staple in the diet of millions of peop

In the massive Zambezi River system, fish are not only vital to the ecosystem, but also a staple in the diet of millions of peop

admin2013-03-27  28
问题     In the massive Zambezi River system, fish are not only vital to the ecosystem, but also a staple in the diet of millions of people. Yet, little is known about the species, their movements and the stocks. In hopes of ensuring that these fish stocks will continue to be around for many years to come, the African Wildlife Foundation has embarked on extensive research and monitoring efforts in the Zambezi River, its tributaries and related reservoirs.
    While tracking the fish of the Zambezi River system, AWF learned of a sport-fishing tournament taking place on the river. AWF decided to join the tournament. All the tournament catches were carefully monitored and recorded, providing invaluable data on the health and size of key trophy specimens.
    For the first time in history, real data is now available on the effect of the human population on the Zambezi River network, on the use of incompatible fishing methods, incompatible land uses(like deforestation, which leads to erosion and massive deposits of silt in the river), and over-fishing. All the research will help AWF and its partners to help guide fishery policy and legislation—and help local communities create fishing strategies that are not just profitable, but truly sustainable.
    For many years, the fish of the Zambezi River network have been bountiful. In fact, the upper part of the river alone feeds 300,000 people. The sardine catch in Lake Kariba yields more than 30,000 tons of fish annually—amounting to more than $55 million a year.
    To manage the region’s fisheries effectively, to monitor water quality, and to keep track of fish yields and fishing activities, AWF created the Aquatic Resources Working Group(ARWG). Its first priority was to gain a greater understanding of the fish that swim in the Zambezi River system as well as a clearer picture of the river system itself.
    Although data collection will continue, the ARWG has already collected a significant amount of data. Now underway are pilot business ventures with fisheries and the creation of a formal fishing association in which registered fishermen drawn from the local community in Mozambique will undergo training in business skills, best-practice fishing, energy-efficient fish processing and marketing. The future is looking bright for both the fish and the communities along the Zambezi River system.
The study of the tournament catches reveals that______.
选项 A、the fishing communities have expanded rapidly
B、the fishermen have been using sustainable fishing strategies
C、there has been no legislation on fishing in the Zambezi River
D、the Zambezi area has been inappropriately exploited
答案D
解析 本题考查推理能力。根据第三段第一句话“For the first time in history，realdata is now available on the effect of the haman population on the Zambezi River network，on the use of incompatible fishing methods，incompatible land uses(like deforestation，which leads to erosion and massive deposits of silt in the river)，and overfishing．”可知，D项符合题意。
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