EbeneNews – AU – Remarkable footage shows how Alaskan bears grow larger before hibernation


    Posted: 10:57 AM EDT October 6, 2020 | Updated: 4:14 p.m. EDT October 6, 2020

    These amazing photographs show the incredible before and after weight gain of grizzly bears in Alaska who can eat 100,000 calories a day to prepare for winter

    North American heavyweights in Katmai National Park and Preserve will not survive if they are too thin for their long winter slumber

    During hibernation, large mammals can lose up to a third of their body weight, lactating females lose even more

    Six vital months before bad weather arrives, bears need a year’s worth of food, gaining up to two pounds of fat per day

    And there is no ‘big shame’ of a heavy bear in Katmai with authorities celebrating the biggest and therefore healthiest animals

    Tonight at 6 p.m. Alaskan time, a brown bear will be sang the winner of « Fat Bear Week » with the public voting for his favorite

    Slideshows bear 812 (left, in June, and right, in September) Eight-one-two has gray, crescent-shaped brown ears Behaviorally, 812 can be identified by his tendency to lick himself lips frequently and using rocks as a platform to eat salmon He will often stretch a front leg forward when fishing on the lip of the falls

    Slideshows Bear 480 (left June, right September) Bear 480 ‘Otis’ is a medium sized adult male with blond and brown fur in early summer In the fall his coat turns gray and he sports a patch lighter fur on his left shoulder

    Bear 32 ‘Chunk’ (left in June, right in September) is a large adult male with tightly set eyes and a prominent browbone Even at his leanest, Chunk carries significant fat stores, in especially on his hindquarters In early summer he tends to shed a lot of the fur around his shoulders and neck This gives him a two-tone appearance and exposes many scars and wounds By the end of summer , its newly cultivated fur is dark brown

    Slideshows Bear 909 (June left, September right) Bear 909 is a young woman with grizzled brown fur 909 was first identified as a two-year-old independent bear in 2018 She is tolerant and playful towards other bears, and she shares many behaviors with her mother and former Fat Bear Week champion 409 Beadnose

    His diet will allow him to win the trophy ahead of 11 other competitors

    Amber Kraft, head of the interpretation and education program at Katmai, said a happy bear is a heavy bear for the winter

    She said: « There is no ‘big shame’ with these animals Big bears mean they are healthy and ready for winter During hibernation, bears live off their fat accumulated

    Katmai’s brown bears are at their biggest in late summer and early fall after a summer spent trying to satisfy their deep hunger

    Bear 128 ‘Grazer’ is a large adult female (pictured in June, above and September, below) with blond fur, a long straight muzzle and remarkably large blond ears In late summer and fall her fur is graying brown and she is often one of the larger bears to use Brooks River

    ‘Each bear faces its own challenges in order to acquire the body mass necessary to survive Adult males must grow up to dominate the best fishing spots and gain mating opportunities

    Females need to gain weight for their own survival as well as to support the birth and growth of cubs

    ‘Cubs experience the same hunger as older bears, but also experience huge growth spurts Juvenile bears living alone for the first time face a daunting challenge to establish home range and find food without their mother’s advice’

    This year, Amber said it was a bumper time for one of the best weight gain foods for a hungry bear, salmon

    Bear 151 ‘Walker’ (photo in June, top and September, bottom) is a large adult male It has a lean muzzle and widely spaced straight ears In early summer it has prominent dark eye rings, and in late summer his fur is dark brown

    She said: « This year’s run of sockeye salmon in the Naknek Arm [lake] and Brooks River has broken records

    The Naknek had four million salmon sinking there and Brooks River had 800,000 sockeye salmon

    « The Brooks River has had very large returns of healthy sockeye salmon over the past 4 years

    ‘The silver salmon run, which starts later in the season, was smaller than in recent years, but it continues to sink and some bears catch them at the falls

    ‘Last year, however, we had a warmer than average summer that delayed the salmon as the rivers and streams were too hot and the salmon stayed in the lakes and cooler waters until see you much later in the season

    Sept-un-neuf (top, June and bottom, September) is a young adult female with shaggy blonde fur, a dark face and tan-tipped claws.In the fall, her coat turns blond dark, but she keeps the light blond ears

    ‘If this warming trend continues, it could impact bears here in Katmai’

    Amber said the numbers needed to make a big bear are way above anything a human can compete with

    She said: « Some bears here in Katmai can eat more than 40 salmon a day

    ‘A salmon is between 2,500 and 6,000 calories, the low end of a salmon diet will provide 100,000 calories per day An average man would burn around 13,000 calories during daily activities

    Seven-four-seven (top, June and bottom, September) is a very large adult male with wide, stake-shaped ears and a lumpy muzzle In early summer, his brown fur reddish disappears unevenly Like many adult men, it often has scars and injuries to its face and neck In late summer and fall it is usually very large with a low stomach and fur evenly dark brown

    ‘Excessive Weight Gain is Key to a Bear’s Survival Bears must eat a full year of food in six months or less to survive winter hibernation and continued spring weight loss

    ‘During hibernation, bears can lose 1/4 to 1/3 of their body weight Lactating females can lose even more

    ‘Unlike the famine of winter and spring, Katmai’s brown bears gain weight quickly in summer and fall Incredibly, they can sometimes gain up to a kilogram – over two pounds of fat per day ‘

    Bear 435 ‘Holly’ (top, June and bottom, September) is a medium to large adult female with blond ears, blond fur and pale tan colored claws. fall, she is generally very oily with graying blonde fur

    Of course, it’s difficult to get a bear to stand on the scale, so Amber said the weight gain estimates were made using known averages for the heights of men and women.

    She said: ‘From what we know of the bears that are weighed we have estimated that the largest bear weighed over 1,400 pounds Sows often weigh 700 lbs or more

    Katmai’s brown bears are among the largest bears in the world They can stand three to five feet at the shoulder and are seven to 10 feet in length

    ‘Most adult males typically weigh between 600 and 900 pounds in midsummer In October and November, large adult males can weigh well over 1000 pounds Adult females average about 1/3 less than adult males

    ‘Fat Bear Tuesday was started by a ranger in Katmai They created a bracket style competition between a select group of very big bears from the park to engage the public in this overeating brown bear phenomenon (hyper -feed) to prepare for winter, and it was a huge success

    Bear 435’s small first year female has graying blonde fur and a curious and playful demeanor

    ‘They follow their favorite bears and cheer them on just like they would at a sporting event Participants vote for their favorite bear

    ‘The bears with the most votes go up in the parenthesis Participants support their favorite bears and there is general goodwill throughout the competition

    ‘There are fans who can tell the story of the competition just as there are sports fans who can chronicle the championships no matter where their teams finish’

    Teachers have told us they use it with students in their classrooms, people filling in hooks for friendly competitions in their offices and workplaces, as well as bars and people lacking in sports for the thrill of what will happen next

    ‘We hope people come away from the week with an understanding and appreciation of the importance of wild places like Katmai National Park and Preserve and work to preserve and safeguard these resources

    ‘Big bears illustrate the richness of Katmai National Park and Bristol Bay, Alaska, a wilderness that’s home to more brown bears than people and the largest and healthiest breeds of salmon red planet’

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    Bear, hibernation, Alaska

    EbeneNews – AU – Remarkable footage shows how Alaskan bears grow larger before hibernation

    SOURCE: https://www.w24news.com



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