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Post by brobear on Dec 5, 2020 11:10:52 GMT -5
Both the very first map on page #1 and the map above on Reply #38 show the Ussuri brown bear in both the RFE and in Japan.
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Post by King Kodiak on Dec 5, 2020 12:22:19 GMT -5
Reply #38 and the very first map on page #1 shows the Ussuri brown bear in the RFE and in Japan. I would wage that the Ussuri and the Hokkaido have been separated for as long a time as the grizzly and the Kodiak. So in your opinion, those brown bears on the island of Hokkaido should stay as Ursus arctos Yesoensis correct?
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Post by brobear on Dec 5, 2020 12:26:59 GMT -5
Yes; it seems like the experts are two-sided on this issue though.
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Post by King Kodiak on Dec 5, 2020 12:30:45 GMT -5
Yes; it seems like the experts are two-sided on this issue though. Yeah, happens sometimes with some bear subspecies. Anyways yeah i agree, even if those 2 bears are very alike, that separation should be enough to have them as 2 different subspecies. As to the official classification now, this is still unclear, not sure if they changed it. Wiki has them as the same, and the Bear conservation site (map at reply #38) also has them as the same.
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Post by brobear on Dec 11, 2020 19:06:15 GMT -5
www.bearconservation.org.uk/asiatic-black-bear/ Range: Once found as far west as France and Germany, the Asiatic black bear is now, as its name suggests, confined to Asia. They are found in Afghanistan, Bangladesh, Bhutan, Cambodia, northeastern China, India, Iran, Japan (on the islands of Honshu and Shikoku), South Korea, North Korea, the Lao PD, Myanmar (Burma), Nepal, Pakistan, southeastern Russian Federation, Taiwan, Thailand and Vietnam.
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Post by brobear on Mar 14, 2022 0:26:19 GMT -5
ielc.libguides.com/sdzg/factsheets/brownbear/population Global population estimate: exceeds 200,000 individuals (McLellan et al. 2017) Russia - more than 100,000 U.S. - 33,000 Over 500 in and near Yellowstone National Park Canada - 25,000 Europe - 15,400 Several very small isolated populations Japan - possibly up to 2,000
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Post by brobear on Apr 15, 2022 1:36:09 GMT -5
What do we know about the origins of the tiger? 6 November 2015 www.awely-tigers.org/what-are-the-origins-of-the-tiger/ The tiger (Panthera tigris) is classified in the genus Panthera alongside the lion, leopard, jaguar and snow leopard, still living in the wild today. Contrary to what was once believed, sabre-toothed tigers – whose canines were tens of centimetres long – weren’t direct ancestors of the modern-day big cats. Some of them were their distant cousins, and others were very remote relations. Therefore, strictly speaking, they weren’t tigers, and there is no proof of them having striped markings on their coats. Uncertainty still surrounds the ancestors of the Panthera genus. It is now understood that the first representatives of this genus lived 10.7 million years ago in central Asia, not – as thought in the past – in Africa 3.8 million years ago. It is understood that the first tigers separated from the ancestors of the snow leopard and of the Panthera blytheae (a species that is now extinct) 8.8 million years ago and became a distinct group. The areas inhabited by the first tigers would have been the historic range of the Bengal tiger: it extended to the Caspian Sea to the west and as far as south west Asia and Indochina to the south, reaching the north of China and into Siberia and even into modern-day Alaska and North America. Climatic variations linked to quaternary glaciations and interglacial periods played a role in encouraging many species to migrate to warmer, more hospitable regions. This is how many different populations of tiger found themselves isolated from each other and differentiated genetically, until being considered today as distinct sub-species. A minority of tigers stayed in the north and adapted to the cold; they became known as Siberian tigers. The others moved further south and west, with some even crossing the Bering Strait to the east when this was possible. Although the tiger has been able to adapt to survive profound changes in its environment, it is now on the brink of extinction due to human practices. Today, it’s certain that the high birth rate amongst tigers will not save the last remaining sub-species of this big cat, unless humans change their relationship with nature and do what is necessary to save them. There are only 4000 tigers left in the wild and every one of us has a role to play in their protection. This is what we are doing in Nepal, in India, in Bangladesh and in Nepal. Now, it is time for you to act.
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Post by brobear on Apr 15, 2022 2:02:26 GMT -5
Approximate Dates of Origin of Bear Species: bear.org/approximate-dates-of-origin-of-bear-species/ 1- Sloth Bear / 7 MYA* / South-central Asia (India?) 2- Sun Bear / 5 MYA* / South-east Asia (Islands?) 3- Asiatic Black Bear / 5 MYA* / Central Asia (Himalayas?) 4- American Black Bear / 5 MYA* / North America 5- Brown Bear / 1 MYA* / Northern Asia 6- Polar Bear / 1 MYA* / Northern Siberia *Note: Both the tiger and the brown bear originated in Asia. The first tigers appeared roughly 10.7 years ago and the first brown bears 1 million years ago. The brown bears spread out across North Africa, Europe, and North America. The tiger remained isolated to Asia. Why?
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hwn
Amphicynodon
Posts: 54
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Post by hwn on Apr 15, 2022 2:38:54 GMT -5
Maybe the tiger has met the rise of human beings, or the tiger itself has insufficient spanning ability.
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Post by brobear on Apr 15, 2022 4:12:24 GMT -5
Maybe the tiger has met the rise of human beings, or the tiger itself has insufficient spanning ability. The brown bear ( Ursus arctos ) has only existed for roughly 1 million years and has spread across the northern-most section of the northern hemisphere. The tiger ( Panthera tigris ) which also originated in Asia, has had nearly 11 million years to spread across the globe, but remains isolated to Asia. The lion ( Panthera leo ) spread out of Africa into Asia and into a small section of Europe. *Note: we could consider all lions as a single group which would include Panthea leo leo, Panthera leo melanochaita, Panthera leo spelaea, Panthera fossilis, and Panthera leo atrox. But then, we would have to consider all of the Ursinae ( Ursus ) bears which includes the sun bear, the sloth bear, the moon bear, the American black bear, the brown bear, and the polar bear as one single group. www.pnas.org/doi/10.1073/pnas.1919423117 en.wikipedia.org/wiki/Ursinae
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Post by brobear on Apr 15, 2022 4:17:03 GMT -5
*Note: IF we compare the lion with all lion 'types' as one to the brown bear, then we have a close contest.
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Post by brobear on Jul 11, 2022 0:47:39 GMT -5
Current range of brown bear.
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Post by brobear on Mar 2, 2023 5:07:09 GMT -5
The Brown Bear map This subreddit is a hub for any news, information, artwork, and discussion focused on rewilding, mainly restoring populations of megafauna species and the ecosystems they are a part of, as well as overall wildlife conservation. Welcome! https://www.reddit.com/r/megafaunarewilding/comments/11e8fdf/the_brown_bear_map/
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