The third danger comes from people's over-hunting. Many polar bears are killed.We need to protect polar bears and their homes, so that they can keep living happily in the Arctic.阅读短文,补全表格。Polar bears They have a big and strong 1. body . a long What do they look like?2. ...
RegisterLog in Sign up with one click: Facebook Twitter Google Share on Facebook carnivore (redirected fromCarnivores) Thesaurus Medical Encyclopedia car·ni·vore (kär′nə-vôr′) n. 1.Any of various mammals of the order Carnivora, including the dogs, cats, bears, weasels, raccoons, ...
Polar bears (Ursus maritimus) are the largestbearspecies and the biggest landcarnivoresin the world. The enormous bears live in the Arctic, where they prowl the icy expanse searching forseals, their preferred prey. Polar bears likely evolved within the last 500,000 years when a population of b...
Polar bears exhibit several different behabiors.First (英文里没有 firstly 这种说法的),they are usually most active and the beginning and end of each day.In the Canadian Arctic,adult female polar bears spend much of their time during the spring and summer in their caves,while the adult male...
Morphology of Pholeoixodes species associated with carnivores in the western Palearctic: Pictorial key based on molecularly identified Ixodes ( Ph. ) canisuga , I. ( Ph. ) hexagonus and I. ( Ph. ) kaiseri males, nymphs and larvae
Arctic and red foxes, sable, and American mink were introduced to Europe, Asia, and many islands in the Pacific by the fur industry. They were kept either in enclosures or cages, but free-living populations soon arose. Some introductions in mainland Europe and Great Britain resulted from “...
(2000a). A comparative chromosome map of the Arctic fox, red fox and dog defined by chromosome painting and high resolution G-banding. Chromosome Res 8: 253–263. Graphodatsky AS, Yang F, Perelman P, O'Brien PCM, Serdukova N, Milne BS et al. (2002). Comparative molecular cytogenetic...
Therefore, the exchange of parasites from wild to domestic carnivores and vice versa have enhanced the public health relevance of wild carnivores and their potential impact in the epidemiology of many zoonotic parasitic diseases. The risk of transmission of zoonotic nematodes from wild carnivores to ...
While the relationship between scaling dimensions and human-carnivore conflict metrics has been assessed for single species or specific regions, such as brown bear (Ursus arctos) in the French Pyrenees (Gastineau et al.2019; Wells et al.2019), it is unknown how robust such scaling relationships ...
gondii protein (at serum dilution 1:100), making the latter a useful alternative for small amounts of serum. We suggest that diet, age and lifetime range are factors determining seropositivity in carnivores in the Serengeti ecosystem and suggest that the role of small wild felids in the ...