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
Harp seals from Canada are showing up in the US waters in greater numbers and farther south than usual, and biologists want to k
Harp seals from Canada are showing up in the US waters in greater numbers and farther south than usual, and biologists want to k
admin
2013-10-08
53
问题
Harp seals from Canada are showing up in the US waters in greater numbers and farther south than usual, and biologists want to know why.
Small numbers of juvenile harp seals are typically found each winter stranded along the coast of the northeastern USA. But this year, well over 100 adult harp seals — not juveniles —have been spotted, said Mendy Garron, regional marine mammal stranding coordinator for the National Oceanic and Atmospheric Administration(NOAA)in Gloucester. The sightings are reported by 14 seal stranding and rehabilitation(康复)organizations in New England and the Middle Atlantic states. "In some areas they’re reporting three times the normal number of sightings," Garron said. "This year, we’ve had four sightings of adult harp seals in North Carolina, which we’ve never had before. We typically don’t see them that far south. "
Seals are common in waters off the northeastern New England states, where the most abundant type is the harbor seal, with a population estimated at about 100 000, the last time they were surveyed a decade ago. Gray seals are the second most common seal. But those numbers are piddling(微不足道的)compared to the number of harp seals found in the northwest Atlantic. Canada’s Department of Fisheries and Oceans says 9 million of them can be found off Canada and Greenland.
A decade ago, harp seal sightings off Maine were rare, said Lynda Doughty, marine mammal stranding coordinator for the state Department of Marine Resources. The numbers have picked up the past few years, and this year there have been 40 documented sightings—more than double the number spotted last year. The harp seals are typically spotted on nearshore ledges and in coves and harbors, but they have also turned up in parking lots and backyards—and one was found on an oceanside golf course in Scarborough. The seals spend most of their time on ice—they are one of several varieties of so-called ice seals—and have made their way onto land across the snow and ice along Maine’s shores.
For now, there is no clear explanation for why more seals are showing up in the US waters, said Gordon Waring, who heads the seal program at NOAA’s fisheries science center in Woods Hole. They could be making their way south because of climatic conditions or perhaps in search of food, Waring said. "These animals are known to wander a lot," Waring said. "Whether they’re following food down or whatever, we don’t really have a good understanding of it."
Garron said she and the seal organizations will look at environmental trends, such as water temperatures, to see if it’s influencing the harp seal range. Regardless of the reason, biologists are taking notice, Doughty said. "We’re all kind of raising our eyes," she said.
What is biologists’ reaction to the current situation of harp seal range?
选项
A、They don’t want to know the reason.
B、They noticed the matter in some way.
C、They will look at environmental changes.
D、They will pay close attention to it.
答案
D
解析
观点态度题。文中Doughty指出,无论是什么原因,生物学家们都非常重视这个问题,她说:“我们都对这个问题很关注。”故应选D)。
转载请注明原文地址:https://kaotiyun.com/show/Mx27777K
0
大学英语六级
相关试题推荐
Americanculturehasbeenenrichedbythevaluesandbeliefsystemsofvirtuallyeverypartoftheworld.Theonevaluethat
A、Businesssuccesstakesahighlevelofactivity.B、Topmanagersaregenerallygiftedatjudgingpeople.C、Businesssuccesstak
A、Singinganddancing.B、Eatinganddrinking.C、Screaminganddancing.D、Shoppingandwatchingmovies.A
A、Healthconditionsimprovewithtimespentwatchinghealthyprograms.B、Comedyvideoscancuremostpeopleofchronicheartatt
A、Refrainfromshowinghisfeelings.B、Expresshisopinionfrankly.C、Arguefiercely.D、Yellloudly.A细节题。四个选项都是动词短语,由核心词汇可知该题可能
Thehumanbraincontains10thousandmillioncellsandeachofthesemayhaveathousandconnections.Suchenormousnumbersuse
WhattoDoDuringUnemploymentEvenastheeconomyimproves,ajoblesspersonmayfaceuptoayearormoreofunemployment.
TheactofGooglingoneselfhasbecomethedigitalage’spremiereguiltypleasure—anactivityenjoyedbyallandadmittedbyfew
TheactofGooglingoneselfhasbecomethedigitalage’spremiereguiltypleasure—anactivityenjoyedbyallandadmittedbyfew
随机试题
城市社区管理主体有__________、__________、__________、__________、__________。
质量为m的人造卫星沿一圆形轨道运动,地球半径为R,卫星距离地面的高度为2R,地球的质量为M,则卫星的动能为______。
设X~B(5,),则D(X)=________.
毛泽东首次提出中国共产党的三大优良作风的会议是()
肾活检时可帮助确定肾病变性质和有无凝血机制的免疫荧光检查是
背景一业主与施丁单位就某大型管网安装工程签订了施工合同,施工合同中有以下一些条款:1.项目实施过程中,施工单位要按监理工程师批准的施工组织设计(或施工方案)组织施工,施工单位不再承担因施工方案不当引起的工期延误和费用增加的责任。
首席风险官发现涉嫌占用、挪用客户保证金等违法违规行为或者可能发生风险的,应当立即向中国证监会派出机构和公司董事会报告。( )
居民消费水平是指居民在物质产品和劳务的消费过程中,对满足人民生存、发展和享受需要方面所达到的程度。反映居民消费水平的主要指标有()。
根据语境,填在横线上最恰当的语句是:今夜的林中,决不宜于将军夜猎——那从骑杂沓,传叫风生,会踏毁了这平整匀纤的雪地;朵朵火燎和生寒的铁甲,______。
ISO/IEC9126软件质量模型中,可靠性质量特性包括多个子特性。一软件在故障发生后,要求在90秒内恢复其性能和受影响的数据,与达到此目的有关的软件属性为()子特性。
最新回复
(
0
)