Seals in the Arctic have a streamlined body shape. This helps them ___. A. move quickly in the water B. stay warm on the ice C. find mates easily D. dig holes in the snow 相关知识点: 试题来源: 解析 A。解析:北极的海豹有流线型的身体形状,这有助于它们在水中快速移动(move quickly ...
On intraspecific structure of ringed seals in the Arctic. Izuvestiya TINRO 71: 301 – 307 . (Fisheries Research Board of Canada Translation Series No. 2411.).Fedoseev, G. A. & Nazarenko, Y. I. (1970) On the intraspecific structure of ringed seal in the Arctic. Fisheries Research Board...
Hooded-seals-live-in-the-Arctic网络冠海豹生活在北极网络释义 1. 冠海豹生活在北极 ... 冠海豹生活在北极。 Hooded seals live in the arctic. 海豹科的模式属;海豹。 Type genus of the phocidae:earless seals. ... www.websaru.com|基于4个网页©...
Melentyev VV, Chernook VI, Pettersson LH (2003) Integrated satellite-airborne technology for monitoring ice cover parameters and ice-associated seals in the Arctic and perspectives of sea mammal global management. In: Harmancioglu NG, Geerders P (eds) Integrated technologies for environmental ...
Seals live in ___. A. tundras B. grasslands C. arctic regions D. deserts 相关知识点: 试题来源: 解析 C。解析:Seals 海豹生活在北极地区等寒冷的地方。选项 A tundras 冻原,海豹主要生活在北极地区,冻原范围比较大不准确。选项 B grasslands 草原,海豹不生活在草原。选项 D deserts 沙漠,海豹肯定...
Polar bears live in the Arctic. They mainly eat seals. If the sea ice melts and seals are hard to find, what will polar bears do? A. Swim to the Antarctic to find seals. B. Change to eat fish only. C. Try to find other food on land like small animals. D. Wait for the ice ...
In an arctic ecosystem, polar bears hunt seals. Seals mainly feed on fish. If the fish population is severely reduced due to overfishing, which of the following will occur? A. The number of polar bears will increase. B. The number of polar bears will decrease. C. The number of seals ...
Shrinking sea ice threatening ringed seals in Arctic.(CLIMATEWATCH)(Brief article)The article presents information on the loss of habitat of the seals that... Rustad,Harley - Geographical (Geographical Magazine Ltd 被引量: 0发表: 2012年 Improving Arctic Sea Ice Observations and Data Access to ...
Phocidae(19 species). The ‘true seal’ family. Members of this family are also known as ‘earless seals’ because their ears are not visible externally. Only 7 pinnipeds (6 true seals and the walrus) are found in the Arctic.
is giving polar bears more challenges in their searches for food. The world's 20,000 to 25,000 polar bears in the Arctic use floating (漂浮的)sea ice as boats for hunting, for mating and for travelling long distances quickly, according to the US Fish and Wildlife Service....