首页
登录
职称英语
Harp seals from Canada are showing up in the US waters in greater numbers an
Harp seals from Canada are showing up in the US waters in greater numbers an
游客
2024-04-29
15
管理
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. [br] 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://tihaiku.com/zcyy/3576878.html
相关试题推荐
[originaltext]Venice,asmall,watersidecityinnortheastItaly,boilswit
[originaltext]Venice,asmall,watersidecityinnortheastItaly,boilswit
[originaltext]Venice,asmall,watersidecityinnortheastItaly,boilswit
HowaddictedhasAmericabecometotelevision?Thenumbersaredisturbingbu
HowaddictedhasAmericabecometotelevision?Thenumbersaredisturbingbu
HowaddictedhasAmericabecometotelevision?Thenumbersaredisturbingbu
Lonelypeople,itseems,areatgreaterriskthanthegregarious(爱交际的)ofdev
Lonelypeople,itseems,areatgreaterriskthanthegregarious(爱交际的)ofdev
Lonelypeople,itseems,areatgreaterriskthanthegregarious(爱交际的)ofdev
Theindustrialrevolutiondramaticallyaffectednewspapers.Boththenumbers
随机试题
Forthispart,youareallowed30minutestowriteashortessayentitledOnBan
(1)NearusonourstreettherewasafamilywithagirlmyagecalledSafin
表音文字以()为记录单位A.音节或词 B.语素或音位 C.语素或词 D.音
治风湿痹痛、腰膝酸软者宜用()。A.防己配独活B.桑寄生配羌活C.羌活配独活D
药品所含成分与国家药品标准规定成分不符的是A:假药B:劣药C:次品药D:处
T淋巴细胞发育的场所是( )。A.骨髓 B.胸腺 C.脾 D.淋巴结
患者咨询护士怎样判断外科急腹症,正确回答是A、先腹痛后发热 B、以腹泻、心悸为
下列是地藏菩萨道场的名山是()。A.湖北十堰的武当山 B.江西鹰潭的龙虎山
下列有关上市公司公开发行证券的条件的表述中,正确的有()A:上市公司的盈利能力应
投资项目决策分析与评价的基本要求包括贯彻落实科学发展观、资料数据准确可靠和()
最新回复
(
0
)