Brown bears (Ursus arctos) is a large bear distributed in most northern Eurasia and North America. Bear adults generally have a weight between 100 and 635 kg (220 and 1,400 lb) and the largest subspecies, Kodiak Bear, rivals the polar bear as the largest member of the bear family and as the largest land carnivores.
There are several recognized subspecies within the brown bear species. In North America, two types are generally recognized, the coastal brown bear and the inland grizzly bears, and two broad types can define all brown bear subspecies. An adult grizzly in the Yukon interior life may weigh as little as 80 kg (180 lb), while the adult brown bears in Alaska live near shore on diet, nutritional stable spawning salmon may weigh as much as 680 kg (1,500 lb). Exact amount of overall brown subspecies remains in debate.
While the brown bear range has shrunk and has faced local extinctions, still listed as a species of concern by the IUCN with a total population of around 200,000. In 2012, this and the American black bear is the only bear species are not classified as endangered by the IUCN. However, the subspecies of California, North Africa (Atlas bear), and Mexico hunted to extinction in the nineteenth and twentieth and Marsican brown bears in central Italy is believed to have a population of only 30 to 40 bears.
Prime rate, including the brown bear from Russia, the United States (most of Alaska), Canada, the Carpathian region (especially Romania, but also Ukraine, Slovakia, Poland, and so on), the Balkans, Sweden and Finland, where it is the national animal. Brown bear is the most widely distributed of all bears.
Brown bears have long, thick fur, with manes long enough in the back of the neck. In India, brown bears can be reddish with silver tips, while in China, brown bears are bicolored with a yellow-brown tunic or white on her shoulder. North America may Grizzlies dark brown (almost black) to cream (almost white) or yellowish brown. Black hair usually have white tips. Winter fur is very thick and long, especially in northern subspecies, and can reach 11 to 12 centimeters (4 to 5) in the Withers. Winter thin hair, but rough to the touch. Summer fur is much shorter and sparser, and its length and density varies geographically.
Brown bears have very large claws and curved, those attending the forelimbs become longer than the hind feet. They can reach 5 to 6 cm (2.0 to 2.4 in) and sometimes 7 to 10 cm (2.8 to 3.9 in) along the curve. They are generally dark with a light tip, with some forms having completely light claws. Brown bear claws are longer and straighter than American black bears.
Blunt claws, while those of black bears sharp. Because of the structure of their claws, as well as their excess weight, adult brown bears can not climb trees as the two species can black bears. The claws of the brown bear is big enough. Hind legs adult bears were found usually measure 21 to 36 cm (8.3 to 14 in) long, with a large Kodiak bear has been measured up to 46 cm (18 in.) along their hind legs.
Adults have a big, very built concave skulls, which are large in body proportions. High forehead and skull steeply.The projections growing up well when compared with those from the recent Asian black bears have a sagittal crest not exceed more than 19-20% of the total length of the skull, while the former has a sagittal crest consists of up to 40 - 41% of the length of the skull. Weaker skull projections developed in women than in men.
Brain shell is relatively small and elongated. There are a lot of geographic variation in the skull, and presents itself especially in dimension. Grizzlies, for example, tend to have flattering profile of European and American coastal brown bears. Russian bears tend skull length from 31.5 to 45.5 cm (12.4 to 17.9 in) for males, and from 27.5 to 39.7 cm (10.8 to 15.6 in) for females. Zygomatic arch width in males is 17.5 to 27.7 cm (6.9 to 11 in.), and 14.7 to 24.7 cm (5.8 to 9.7 in) in women. Brown bears have very strong teeth: a relatively large incisors and canine teeth large, highly curved lower. Three maxillary first molar undeveloped and single crowned with one root.
Molar on both smaller than the other, and usually not in adults. It is usually lost at an early age, leaving no trace alveolus in the jaw. The first three of the mandibular molars are very weak, and often lost at an early age. Although they have powerful jaws, brown bear jaws are not able to breach large bones with the ease see hyenas.
The Brown Bear is the most different sizes of species extant bears. Dimensions of brown bears fluctuate very greatly according to sex, age, individual, geographic location, and season. The normal range of physical dimensions for a brown bear is the length of the head-and-body 1.4 to 2.8 m (4.6 to 9.2 ft) and a shoulder height of 70 to 153 cm (28 to 60 in). Males always larger than the female, usually with around 30% more weight in the race. Tail relatively short, ranging from 6 to 22 cm (2.4 to 8.7 in) in length.Young year usually weighs 2-27 kg (4.4 to 60 lb), while yearlings usually weighs 9-37 kg (20 to 82 lb).
In general, expensive brown bear at least when they emerge from hibernation in the spring and then reach peak weight when preparing for hibernation in the fall (as they often gorge on large food items).
Several subspecies showed considerable variation. While the Eurasian brown bear (U. a. Arctos) and grizzly bear (U. a horribilis.) From Northern Europe, Yellowstone National Park or interior Alaska seasonal average weight between 115 and 360 kg (250 and 790 lb), bears the yukon Delta, British Columbia interior, Jasper National Park and southern Europe may weigh 55-155 kg (120-340 lb) on average. From Syria bear (U. a syriacus.) And Gobi Desert (U. a gobiensis.) Subspecies is about the same mass as small Eurasian brown and grizzly bear and can measure very small as 1 m (3.3 ft) in head-and-long body.
At the other end of the scale of interior brown bears, grizzly normal, brown bear Eurasian and East Siberian brown bear (U. a collaris.) Has been weighing up to 680 kg (1,500 lb), 481 kg (1,060 lb) and 600 kg (1,300 lb ), respectively.
Due to lack of genetic variation within subspecies, environmental conditions in a particular region may play the biggest part in the weight variation. Interior brown bears are generally smaller than often perceived, to be around the same weight as the average African lions average estimate of 180 kg (400 lb) in males and 135 kg (300 lb) in females.
Largest inland brown bear subspecies appears to be Ussuri brown bear (U. a lasiotus.), Probably ancestors of modern American grizzly, which in turn is comparable to the size of a bear littoral as described below.
Brown bears are found in the coastal areas of Alaska and the Russian Far East is the largest. Kodiak bears are the largest subspecies (U. a. Middendorffi), followed by the Kamchatka brown bear (U. a beringianus.), Though bears from other coastal areas of East Asia and western North America can be comparably large. In the districts, the average girl from 181.4 to 318 kg (400 to 700 lb) and average men 272-635 kg (600 to 1,400 lb). It is not uncommon for male Kodiak bear weight up to 680 kg (1,500 lb) in the fall with some specimens reaching 780 kg (1,700 lb) or more.
Big men like to stand over 3 m (10 ft) high while on their hind legs and woven 1.5 m (5 ft) tall at the shoulder. The heaviest recorded brown bear weighed more than 1,150 kilograms (2,500 pounds). In addition, the maximum weight of 1,500 kg (3,300 lb) for Kodiak bears published.
No comments:
Post a Comment