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Post by oldindigosilverback on Mar 1, 2023 7:15:20 GMT -5
Rest in peace đ.
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Post by arctozilla on Sept 22, 2023 3:57:05 GMT -5
I also found out that 20% of fat is considered healthy for human standards.
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Post by arctozilla on Sept 22, 2023 4:03:33 GMT -5
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Post by arctozilla on Sept 22, 2023 12:05:00 GMT -5
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Post by oldindigosilverback on Sept 22, 2023 17:25:46 GMT -5
/\ In addition the polar bear has a narrow post scapula fossa on its scapula. That probably gives it the slight extra grappling ability compared to brown bears.
Not sure how much white fibre twitch muscles a polar bear has but swimming exercises every muscle in the body.
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Post by Gorilla king on Dec 18, 2023 10:36:01 GMT -5
Contribution of hybridization between polar bears and grizzly bears to polar bear extinction
Abstract
This review explores whether recent hybridization events between polar bears ( Ursus maritimus ) and grizzly bears ( Ursus arctos horribilis ) will eventually contribute to the extinction of the modern polar bear. In April 2006, genetic analysis of an oddâlooking bear killed in the Northwest Territories, Canada, revealed this specimen to be a polar bearâgrizzly bear hybrid, and additional hybrid bears were harvested beginning in April 2010. These events have been sensationalized by some in the media, who have speculated that the modern polar bear may become extinct due to crossbreeding with grizzly bears. Although studies support the introgression of brown bear genes into the polar bear genome during the Pleistocene, no evidence supports the occurrence of a similar event today. Even if such an introgression event occurred, hybrids evolving rapidly enough to adapt to ongoing sea ice depletion is not scientifically plausible. The loss of genetic integrity and modified morphology due to inbreeding between polar bears and grizzly bears are not considered threats to polar bear survival. As many scientists have stressed for decades, the greatest threat to the survival of the modern polar bear is sea ice depletion due to climate change.
www.researchgate.net/publication/376566523_Contribution_of_hybridization_between_polar_bears_and_grizzly_bears_to_polar_bear_extinction
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Post by Gorilla king on Dec 29, 2023 14:07:03 GMT -5
Long-Distance Movement of a Female Polar Bear from Canada to Russia
Abstract and Figures
Polar bears (Ursus maritimus) display fidelity to large geographic regions, and their movements are influenced by sea ice distribution. Polar bear subpopulations are moderately distinct from one another, and long-distance movements between subpopulations are rare. We describe and analyze the movements of a female polar bear tracked by satellite telemetry from spring 2009 for 798 days. This female traveled an exceptionally long distance (totaling 11 686 km) from the sea ice off the Yukon Territory, Canada (Southern Beaufort Sea subpopulation) to Wrangel Island, Russia (Chukchi Sea subpopulation). In comparison to other polar bears in this study, this bear traveled farther, moved faster, and had a much larger home range in the first year. Furthermore, the calculation of the home range size by two different methods demonstrated that the commonly used minimum convex polygon method overestimated the home range compared to the less biased Brownian bridge movement model. This femaleâs long-distance movement was unusual and provides additional evidence for gene flow between subpopulations. Monitoring polar bear movements is useful to track such events, which is especially important at present because sea ice loss due to climate change can affect subpopulation boundaries and influence management.
www.researchgate.net/publication/317270831_Long-Distance_Movement_of_a_Female_Polar_Bear_from_Canada_to_Russia
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Post by oldindigosilverback on Feb 8, 2024 7:01:39 GMT -5
Male vs Female Polar Bears: Aggression.Both male and female polar bears engage in aggressive behavior from time to time. However, the cause of their aggression is vastly different. F emale polar bears almost exclusively get aggressive in the protection of their young. Cubs are extremely vulnerable for many months after birth, and females need to protect them from not only prey but also male polar bears. Male polar bears, however, do not have this protective instinct over their young. Instead, male polar bears exhibit aggression to either gain hierarchical rank or get food. They will play-fight one another to demonstrate dominance. Additionally, hungry male polar bears have been known to attack their own young to satiate their starvation. The vast majority of human attacks from polar bears have been hungry males. During mating season, male polar bears can be aggressive with other male polar bears in pursuit of a female to mate. However, outside of mating season, male polar bears can entire alliances with one another and have a generally non-aggressive relationship. a-z-animals.com/blog/male-vs-female-polar-bears-key-differences/
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Post by oldindigosilverback on Feb 9, 2024 7:46:23 GMT -5
Andrew Derocher @aederocher ¡ Feb 9 Male polar bear kills female in zoo. It's uncommon but intraspecific predation happens - I've seen the evidence in the field. We found this dead female in the Beaufort Sea - partially consumed. Punctures in skull suggest an adult male killed her twitter.com/AEDerocherWarsawm posted this on Carnivora. I believe the polar bear knows skull bites and will be the quickest kill among bears.
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Post by oldindigosilverback on Feb 9, 2024 7:55:13 GMT -5
The bear was fixated on something in the water, and when it leapt in and started swimming towards our ship I had just enough time to realise I was seeing a polar bear swim for the first time before it reached its target, and the full awesomeness of the moment was revealed. There was no struggle, suggesting the narwhal was already dead, but the polar bear still had its work cut out for it. After swimming the carcass back to shore, the bear struggled to pull more than 500kg of narwhal up onto a rock. adventuresallaround.com/narwhals-and-polar-bears-on-an-arctic-expedition-cruise/
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Post by Montezuma on Feb 9, 2024 16:12:24 GMT -5
This photo has been rewarded as the year's best wildlife pic.
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Post by arctozilla on Feb 10, 2024 8:25:05 GMT -5
The bear was fixated on something in the water, and when it leapt in and started swimming towards our ship I had just enough time to realise I was seeing a polar bear swim for the first time before it reached its target, and the full awesomeness of the moment was revealed. There was no struggle, suggesting the narwhal was already dead, but the polar bear still had its work cut out for it. After swimming the carcass back to shore, the bear struggled to pull more than 500kg of narwhal up onto a rock. adventuresallaround.com/narwhals-and-polar-bears-on-an-arctic-expedition-cruise/Still that doesn't debunk the fact that a female polar bear dragged and pulled out of water a narwhal three times as heavy as herself.
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Post by oldindigosilverback on Feb 11, 2024 1:36:18 GMT -5
/\ If a female polar bear can pull out a beluga five times her weight, of course she can pull out a polar bear three times her weight . Btw I am not debunking anything. The polar bear is overall the most powerful bear if anything (except when it overlaps with the brown bear at weight parity in my opinion).
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Post by oldindigosilverback on Feb 24, 2024 3:57:26 GMT -5
What Does a Polar Bear Sound Like? â Polar Bear Sounds FACTSPolar bears have a range of vocalizations but they are no noisy animals. Icy bears remain quiet and live solitary lives most of the time. However polar bearsâ sounds are heard either during mating season when males attempt to convince its mating partner or when the individuals fight each other. Mature male bears produce sounds in order to show aggression either before the fight or during fighting. Prominent among the aggressive sounds is chuffing which is not heard when bears are in good mood. Thus the chuffing sound suggests that the polar bear is not in a good mood at all. They never make chuffing sound while playing. Do you want to know what sound does a polar bear make in tundra? What Does a Polar Bear Sound Like? Icy bears are thought to produce as many as 3 to 6 different sounds. Each sound shows different behavior of an animal. The polar bearâs sounds include moaning, jaw-chopping, growling, blowing, hissing, whimpering, throaty rumblings, braying, squalling, smacking, roaring, and finally chuffing. If you come across a vocal polar bear youâll notice that she might sound like a tiger or a lion when she roars. The roaring sound is not as clear though but it is good enough to give the impression of a tiger. Sometimes ice bears appear to sound like elephants. The sound roaring is sometimes is a call of excitement as most bears roar when they are in a fairly good mood. Aggressive calls include jaw-chopping and growling. What does a Polar Bear Sound when she is Angry? Polar bears make a repeated call of chuffing when they are angry. While they often avoid fighting and walk away the mother bear produces chuffing sound when she must defend her cubs against an intruder. Male polar bears regularly show strength to the outsider male but they do not do so in order to defend cubs. They will leave mother and cubs soon after mating. Male bears often fight to win over their mating partner. That is why the chuffing sound is typically heard in the mating season rarely in regular days. They will produce a chuffing sound with open mouth. Since they utter same chuffing sound in different situations it depends on the context as to what polar bears want to say. Studies suggest that adults also utter chuff sound when they are in distress. Itâs like a âmaydayâ call. While bears mostly live alone sometimes polar bears live in groups. If one of the group members get separated then she might utter a repeated call of chuffing. what does a polar bear sound likeWhen do Female Polar Bears produce a Chuffing call? Female bears become more vocal in the first 120 days when they emerge out of their maternity dens. They do so in order to drive out all sorts of threats from her cubs. Unlike adult males female polar bears are devoted mother and they will actively respond to the distress call of their babies. The call is greatest when cubs are only few days old in age. However as the polar bear babies become 3 â 4 months old the mother produces call but only sometimes. The mother bear is also likely to chuff when she plays with her cubs. Sometimes she sniffs, or rubs her muzzle against her cubs, or when she bites and paws. She may utter the same chuff sound during all these actions. Similarly, if a mother bear attempts to change her posture she produces a chuff call. Polar bear cubs get separated from their mother after attaining one year age (sometimes two years). During this separation moment the mother and a cub will either roar or chuff. Scientists observed that when the mother chuffs the cubs actively respond to her call by coming nearer to her. When do Male Polar Bears produce a Chuffing Sound? The adult males go away and live a solitary life after mating but when the same male returns to the female (after 2 years) the entire family i.e. mother, father, and cubs begin to chuff. Observation suggests that males utter a chuffing sound when they copulate. Alongside chuffing they also moan during copulation. What do Baby Polar Bears Sound Like? Polar bear cubs are thought to utter a unique humming sound but they also chuckle during nursing. They also speak right after the birth but the vocalization is not so clear. What does a Polar Bear Sound Like? â Videopolarbearfacts.net/what-does-a-polar-bear-sound-like/
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Post by Gorilla king on Apr 1, 2024 17:33:19 GMT -5
A Case of Offspring Adoption in Free-Ranging Polar Bears (Ursus maritimus)
Abstract
During a study of the reproductive ecology of polar bears (Ursus maritimus) in western Hudson Bay (Canada), we documented a case of litter adoption. In an eight-month period, a ten-year-old adult female lost a litter of two cubs-of- the-year and adopted three other cubs-of-the-year. This is the first reported case of natural offspring adoption in polar bears , and its significance as a reproductive strategy is unknown. Nevertheless, the observation raises questions regarding the social circumstances under which adoption may occur and the benefits or costs to maternal fitness in a solitary mammal such as the polar bear.
www.researchgate.net/publication/241745954_A_Case_of_Offspring_Adoption_in_Free-Ranging_Polar_Bears_Ursus_maritimus
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Post by oldindigosilverback on Apr 10, 2024 3:35:37 GMT -5
Longevity Polar bears can live 20 to 30 years, but only a small percentage of polar bears live past 15 to 18 years. The oldest known polar bear in the Arctic lived 32 years. The oldest known polar bear in a zoological park lived 45 years. Aging Studies Each year, as a polar bear grows, a thin layer of cementum is added to each tooth. Age can be estimated by examining a thin slice of tooth and counting the layers. To estimate the age of a live polar bear, researchers can extract one small, vestigial premolar tooth.. seaworld.org/animals/all-about/polar-bear/longevity/
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Post by oldindigosilverback on Apr 10, 2024 7:19:39 GMT -5
So male polar bears or polar bears in general do not live beyond 18. Could it be due to cannibalism as well as fights to death during mating season? It could also be due to many being unable to find food at times. In comparison to other bears, polar bears find it harder to find their food due to their diet.
Personally I believe the polar bear has the hardest life out of all bears.
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Post by oldindigosilverback on Apr 21, 2024 3:13:19 GMT -5
"veteran polar bear kills his young male mate" Mate? Was that polar bear gay? Mate is an Australian slang for the word 'friend' or 'companion' as they live together in the same cage.
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