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Post by OldGreenGrolar on Jul 11, 2020 10:15:41 GMT -5
Reply 59. That is good observation. I agree with you. If the young adults and subadults were npt taken into consideration, surely the Ussuri brown bear is bigger than expected. I might not be surprise that the larger.
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Post by brobear on Aug 16, 2020 6:54:18 GMT -5
We can safely say that the average Rocky Mountain grizzly full-grown male weighs roughly 500 pounds. We can safely say that the average Ussuri brown bear full-grown male weighs roughly 650 pounds. We all know that, when it comes to average weights, no precise numbers can be carved in stone.
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Post by brobear on Aug 21, 2020 22:25:11 GMT -5
King Kodiak I've taken a closer look at the weight analysis of polar bears I once did over at Carnivora and the average weight of adult polar bears (5 years+) is ~1075lbs based on 9 populations; the largest are the Foxe Basin polar bears averaging ~1300lbs and the smallest are the Svalbard polar bears averaging ~850lbs. The 1089lbs weight figure for fully grown Kodiak bears is based on seven specimens that Troyer weighed personally, nothing left to say here. I don't find 1,089 pounds average for a full-grown male Kodiak bear difficult to believe at all. Sounds right on the money to me.
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Post by OldGreenGrolar on Aug 28, 2020 12:18:29 GMT -5
An adult male polar bear at five years old is not yet sexually mature (6 years is when they become sexually mature). This means their average weight is heavier than 1075lbs based on the 9 populations.
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Post by brobear on Sept 2, 2020 9:21:39 GMT -5
Heaviest reliable confirmed record lion in the wild weighed 260 kg ( 573 pounds ). Heaviest reliable confirmed record tiger in the wild weighed 388.7 kg ( 857 pounds ). Heaviest reliable confirmed record brown bear in the wild weighed 751.15 kg ( 1,656 pounds ). *The heaviest tiger outweighed the heaviest lion by 284 pounds. *The heaviest brown bear outweighed the heaviest tiger by 799 pounds. *The heaviest brown bear outweighed the heaviest lion by 1,083 pounds.
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Post by King Kodiak on Sept 2, 2020 10:42:03 GMT -5
Nothing to be pround of i should add. This is an extremely obese and unhealthy tiger.
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Post by brobear on Sept 4, 2020 6:22:43 GMT -5
Nothing to be pround of i should add. This is an extremely obese and unhealthy tiger. Probably had been gorging itself for several days from a large carcass when shot and weighed by a hunter ( IMO ).
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Post by brobear on Sept 5, 2020 12:34:05 GMT -5
Heaviest reliable confirmed record lion in the wild weighed 260 kg ( 573 pounds ). Heaviest reliable confirmed record tiger in the wild weighed 388.7 kg ( 857 pounds ). Heaviest reliable confirmed record brown bear in the wild weighed 751.15 kg ( 1,656 pounds ). *The heaviest tiger outweighed the heaviest lion by 284 pounds. *The heaviest brown bear outweighed the heaviest tiger by 799 pounds. *The heaviest brown bear outweighed the heaviest lion by 1,083 pounds. However; lions weighing more than 300 Kg of weight have also been witnessed within the wild as well. In 1936; a male lion was shot in South Africa’s Transvaal area and it weighed 313 Kg (690 Pounds) which is very unusual for a lion; especially in the wild. This is also the highest recorded weight for any lion in the wild.
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Post by brobear on Sept 6, 2020 15:59:54 GMT -5
New revised comparison of record weight predators: Heaviest reliable confirmed record lion in the wild weighed 260 kg ( 690 pounds ).
Heaviest reliable confirmed record tiger in the wild weighed 388.7 kg ( 857 pounds ).
Heaviest reliable confirmed record brown bear in the wild weighed 751.15 kg ( 1,656 pounds ).
*The heaviest tiger outweighed the heaviest lion by 167 pounds.
*The heaviest brown bear outweighed the heaviest tiger by 799 pounds.
*The heaviest brown bear outweighed the heaviest lion by 966 pounds.
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Post by brobear on Sept 8, 2020 9:13:11 GMT -5
*The average full-grown male Ussuri brown bear ( 9+ yrs and up ) somewhere betwen 650 and 700 pounds.
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Post by theundertaker45 on Nov 14, 2020 7:16:35 GMT -5
A few thoughts of mine on the official max. weights; the legendary "2200lbs" polar bear and "1650-1700lbs" Kodiak bear were based upon hunting records dating back to the early-mid 20th century. All of this could be true but methods of weighing have drastically improved since then and there can always be room for speculation. This should be a list of the largest officially and reliably weighed individuals:
Alaskan Brown Bear/Kodiak Bear
Summer: ~975lbs (~442kg); an 18y old male personally captured and weighed by Leland Glenn during his studies on Alaskan brown bears in the summers of 1975-1980. I know that "Van" was estimated to be ~1300-1500lbs in summer but this is unofficial and speculation for the most part.
Spring: ~1190lbs (~540kg); an adult male (above 9y of age) personally captured and weighed by Will Troyer during his studies on Kodiak Island (must have been in the late sixties or early seventies).
Fall: ~1417lbs (~643kg); an adult male (age is unknown but most likely a prime adult) shot and weighed by Jim Willems and his team during a stay on Afognak Island/Shuyak Islands most likely in October 2014. The bear was weighed after losing all of his blood and was estimated to weigh close to ~1450lbs (~658kg) when still being alive. I know we have an old hunting record of an individual surpassing 750kg but the circumstances of this are very dubious and questionable.
Polar Bear
Stan: ~1786lbs (~810kg); an adult male polar bear personally captured and weighed by Gordon Stenhouse and Nick Lunn on Southhampton Island in 1985; Gordon Stenhouse keeps a large picture of him in his personal office. Regarding the 2200lbs polar bear; that's also a dubious and questionable hunting record. We know that this specimen was the tallest polar bear ever recorded but the weight data is unofficial.
When talking about weight data, you have to differentiate between reliable and unreliable records; only taking the information of the highest possible degree of reliability into account, these would be the top spots for the biggest bears alive.
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Post by OldGreenGrolar on Nov 16, 2020 7:16:58 GMT -5
I think Stan is probably the heaviest male polar bear measured. The 2200 pound polar bear is just estimated by a trophy hunter.
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Post by theundertaker45 on Nov 16, 2020 12:34:52 GMT -5
Big news, guys; I received an excellent document on the estimated weights of grizzly bears inhabiting the Cabinet-Yaak Ecosystem, thenormalguy sent it to me, really grateful for that! So here are the numbers: Mature male grizzlies (5y+, old ones were also included): ~194.2kg (~428.1lbs; n=19) Mature female grizzlies (5y+, old ones were also included): ~126.2kg (~278.2lbs; n=15)
Fully grown/Prime male grizzlies (all boars being at least 9y of age and not too old; I excluded one male at 27y of age): ~217.4kg (~479.3lbs; n=8) Fully grown/Prime female grizzlies (all sows being at least 7y of age and not too old; I excluded three females being well over 25y of age): ~141.9kg (~312.8lbs; n=11)
Largest male: 270kg (595.2lbs), 14y of age Largest female: 171kg (377lbs), 11y of age
The whole document is available here: transbordergrizzlybearproject.ca/pdf/Kasworm%20et%20al%202009.pdf
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Post by King Kodiak on Nov 16, 2020 13:24:11 GMT -5
Great info Undertaker and Thenormalguy. I see The 9+ year olds are around 10 lbs larger than the Yellowstone population.
Also very interesting from page #29, a 37 year old wild female grizzly:
In 1993, claws from a grizzly bear were discovered in Baree Creek of the Cabinet Mountains. Analysis of DNA from these claws matched bear 678 originally captured in the Cabinet Mountains in 1983 when 28 years-old. Tissue present on the claws suggested that she died no earlier than 1992. Bear 678 would have been at least 37 years old at the estimated time of death. Pedigree analysis also indicated that the 3 bears captured in the Cabinet Mountains from 1983-1988 were a triad with bear 680 being the offspring of bears 678 and 14.
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Post by Deleted on Nov 16, 2020 14:20:19 GMT -5
Big news, guys; I received an excellent document on the estimated weights of grizzly bears inhabiting the Cabinet-Yaak Ecosystem, thenormalguy sent it to me, really grateful for that! So here are the numbers: Mature male grizzlies (5y+, old ones were also included): ~194.2kg (~428.1lbs; n=19) Mature female grizzlies (5y+, old ones were also included): ~126.2kg (~278.2lbs; n=15)
Fully grown/Prime male grizzlies (all boars being at least 9y of age and not too old; I excluded one male at 27y of age): ~217.4kg (~479.3lbs; n=8) Fully grown/Prime female grizzlies (all sows being at least 7y of age and not too old; I excluded three females being well over 25y of age): ~141.9kg (~312.8lbs; n=11)
Largest male: 270kg (595.2lbs), 14y of age Largest female: 171kg (377lbs), 11y of age
The whole document is available here: transbordergrizzlybearproject.ca/pdf/Kasworm%20et%20al%202009.pdfImportant Note to add to U-45 post that caught my eye : One 7 year male weigh 248 kg.
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Post by theundertaker45 on Nov 16, 2020 14:32:38 GMT -5
thenormalguyAs this male was captured in 1997, he will most likely have grown to a very big adult. Maybe reaching the 300kg mark in his prime.
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Post by brobear on Nov 23, 2020 16:30:22 GMT -5
Just to give you guys a heads-up; Reply #3 remains incomplete.
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Post by King Kodiak on Nov 23, 2020 17:42:11 GMT -5
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Post by King Kodiak on Nov 23, 2020 18:52:44 GMT -5
theundertaker45 : from reply #3: American black bear - boar: 263.2 pounds. We have the Indian sloth bear at 290 lbs. Is that the average from all the American black bear subspecies combined? Its weird that the sloth bear weights more. Here are some averages from ABB from different populations and subspecies:
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Post by theundertaker45 on Nov 23, 2020 18:56:32 GMT -5
Yes, all black bears combined. They have enormous regional variation, thus the total average is smaller.
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