首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
When fisheries have sunk or collapsed, one approach to fix the situation is to set up a marine reserve where fishing is banned.
When fisheries have sunk or collapsed, one approach to fix the situation is to set up a marine reserve where fishing is banned.
admin
2018-01-28
32
问题
When fisheries have sunk or collapsed, one approach to fix the situation is to set up a marine reserve where fishing is banned. The idea is to provide relief to stressed fish stocks by providing safe living environment where fish can reproduce, and then spread out.
Jennifer Caselle, a biologist from University of California, provided a local example of success. In 2003, the state of California set up a network of 12 marine reserves near Los Angeles and banned fishing in more than 488 square kilometers. By monitoring the area before and after, Caselle and her colleagues found that over 5 years there were 50% more blue rockfish and other species targeted by fishing inside reserves than outside. There was no change in species that people don’t eat, suggesting that fishing restrictions were responsible for the recovery.
Another success story comes from Australia, which created the first large marine reserve in the Great Barrier Reef Marine Park in 1975. After a major die-off of coral (珊瑚), the government decided in 2003 to rezone the park and increased the proportion of no-take areas from less than 5% to 32%. Many fish species quickly doubled in size and numbers. The new reserves also seemed to improve ecosystem health in general, as outbreaks of coral-eating starfish were nearly 4 times more frequent on the reefs where fishing was still permitted.
What makes a marine reserve successful? Taking a broad look at 56 marine reserves around the world, Joshua Cinner of James Cook University examined the social and economic factors. The number of people living near the reserves played a big role in some cases. In the Caribbean, reserves near large populations tended to have less fish relative to unprotected areas than did reserves that were more remote. But the opposite was true in the Western Indian Ocean. It’s not clear why, but one reason could be that people tend to move to places with healthy marine reserves so that they can fish nearby.
Another factor related to successful marine reserves was, as expected, compliance (遵从) with fishing restrictions. And that tended to be associated not just with enforcement, but more complicated social dynamics such as how well people work together and participate in research and management. "In areas where people work together to invest in their resources, we saw less people illegally catching fish inside marine reserves," Cinner said in a statement. "To get high levels of compliance with reserve rules, managers need to foster the conditions that enable participation in reserve activities, rather than just focusing on patrols."
What the Australian government decided to do in 2003 was ultimately aimed at_____.
选项
A、increasing the number of fish species
B、decreasing the number of starfish
C、preserving the corals
D、setting up a marine park
答案
C
解析
原文该句开头After引出的时间状语也表示了澳大利亚政府2003年决定扩大保护区范围的原因,由此可见,当年的决定主要是为了保护珊瑚,因此本题应选C。
转载请注明原文地址:https://jikaoti.com/ti/EvxFFFFM
0
大学英语六级
相关试题推荐
Electroniccigarettesarehandheldnicotine-deliverydevicesthat,despiteadevotedfollowing,arecurrentlyswirlingincontro
Theideaofusingyourdishwashertocookamealhasbeenaroundsincethe’80s.It’sbeenusedtocook【C1】______mainlyfish.Th
It’sagoodideatoapplysunscreenbeforeheadingtothebeachifyoudon’twanttoburn.Butformarineanimalslikewhales,t
IsitanywonderthatAmericaisalsoacountryofdangerouslyoverweightpeople?AccordingtoarecentstudybytheNationa
A、BecausehehasbeeninLondonalotlonger.B、BecausehehasgotatypicalLondonCockneyaccent.C、BecausehewasborninLon
A、Hehasafeelingofinsecurity.B、Heismissinghisfamily.C、Helacksself-confidence.D、Hefeelsill.B细节题。男士举例说明有时人们的着装表达出下
A、ItenablesUKinstitutionstoreturnculturalobjects.B、ItgivesQueenElizabeththepowertocollectdiamonds.C、CasesinIn
A、Takingadvantageofraresunshine.B、Puttingupwithannoyingbears.C、Havingaccesstonutritiousfood.D、Protectingthemselv
A、Protectingpeoplefromalcoholabuse.B、Increasingtaxonalcoholproduction.C、Raisingthelegalagefordrinking.D、Forbiddi
A、EarthandtheMoontraveledatdifferentspeeds.B、TheMoonformedbillionsofyearsbeforeEarth.C、Earthdidnothaveenough
随机试题
根据《商业银行法》,关于商业银行分支机构,下列哪些说法是错误的?
患者,女,18岁。2周前患扁桃体炎,近日心悸,气短,发热,出汗。踝、膝关节游走性疼痛。查体:心率110次/分,第1心音减弱,上肢内侧皮肤有环形红斑。应首先考虑的是()
根据我国建设市场发展现状,工程量清单计价和计量规范主要适用于()。
建筑变形观测过程中,必须立即报告委托方,并及时拉回观测次数或调整变形测量方案的情况有()。
下列关于行政机关的行政行为特征的表述,正确的是()。
关于股票估值方法,以下模型和方法属于内在价值法的是()。
下列选项中,反映当天全部业务活动情况并轧平当天全部账务的重要工具是()。
1,5,5,25,125,()
下面所列的条件中Ⅰ.语法检查Ⅱ.语义检查Ⅲ.用户存取权限检查Ⅳ.数据完整性检查当用户发出查询数据库数据的命令时,数据库管理系统需要进行的检查是
在窗体上画一个命令按钮,然后编写如下事件过程:PrivateSubCommand1_Click()Fori=1To4x=4Forj=1To2x=x+6NextNextPrintxEndSub程序运
最新回复
(
0
)