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Post by King Kodiak on Apr 27, 2020 13:04:56 GMT -5
TheUndertaker, how did you get this average though? Because in the only chart we have, 5 specimens of 9+ year olds, weighted an average of 389 kg (857 lbs). Dont even look at the kodiak bear line because it has the 6+ year olds, obviously not reliable at all. But the Alaskan peninsula bear does have the 9+ year olds.
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Post by theundertaker45 on Apr 27, 2020 13:10:58 GMT -5
I didn't look at all of them, King Kodiak, maybe brobear can help you.
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Post by King Kodiak on Apr 27, 2020 13:13:25 GMT -5
I didn't look at all of them, King Kodiak, maybe brobear can help you. Oh ok, i thought you had edited that one elso.
Brobear: why you put 975 for the Alaskan Peninsula? 857 is the best estimate we have based on the chart above. You already have 460 for females which is correct.
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Post by brobear on Apr 27, 2020 13:40:04 GMT -5
carnivora.net/brown-bear-ursus-arctos-t2935.html By Ursus Arctos: 835 pounds is an average for a sub-adult 8-9 year old Kodiak. Notice the section under Adult Weight. "Willard A. Troyer writes: Four males weighed in the fall ranged from 960 - 1,346 pounds and three spring species ranged from 813 - 1190 lbs." Take the median value between 813 and 1190, and you'll come up with an average of about 1000 lbs for boar Kodiak Brown Bears. ADF&G technical report on Alaskan Grizzlies suggests an average weight of 441 kg, or 974 lbs for mature (>10 y.o.) Brown Bears from Alaska Peninsula.
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Post by King Kodiak on Apr 27, 2020 14:03:57 GMT -5
carnivora.net/brown-bear-ursus-arctos-t2935.html By Ursus Arctos: 835 pounds is an average for a sub-adult 8-9 year old Kodiak. Notice the section under Adult Weight. "Willard A. Troyer writes: Four males weighed in the fall ranged from 960 - 1,346 pounds and three spring species ranged from 813 - 1190 lbs." Take the median value between 813 and 1190, and you'll come up with an average of about 1000 lbs for boar Kodiak Brown Bears. ADF&G technical report on Alaskan Grizzlies suggests an average weight of 441 kg, or 974 lbs for mature (>10 y.o.) Brown Bears from Alaska Peninsula. I see. I also respect Ursus arctos (the poster), one of the most mature and reliable. So these weights are perfect. Awesome.
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Post by theundertaker45 on Apr 27, 2020 14:05:12 GMT -5
brobear I read through Ursus arctos' data and the 974lbs are based on rough estimations. The 857lbs from the other study is a more reliable source as they actually weighed the bears. The 1000lbs for mature male Kodiak bears is fully reliable as it is based on three spring specimens.
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Post by brobear on Apr 27, 2020 14:11:14 GMT -5
brobear I read through Ursus arctos' data and the 974lbs are based on rough estimations. The 857lbs from the other study is a more reliable source as they actually weighed the bears. The 1000lbs for mature male Kodiak bears is fully reliable as it is based on three spring specimens. Thanks 'Taker. I was loving that 974 pound figure; but most importantly, I want our data to be correct.
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Post by King Kodiak on Apr 27, 2020 14:14:56 GMT -5
Still, 857 lbs is a very large average weight, that is not bad at all.
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Post by theundertaker45 on Apr 27, 2020 14:18:06 GMT -5
It seems to me that coastal brown bears tend to put on relatively more weight as they get older than inland grizzlies.I went through Ursus arctos' data and young adult Kodiak bears weigh ~600-650lbs; young adult mountain grizzlies weigh ~420-430lbs. When they are fully grown, the weight of coastal brown bears rapidly increases up to a whopping 1000lbs in the case of Kodiak bears, however, only up to ~475-500lbs in the case of mountain grizzlies. A Kodiak bear nearly doubles his weight and a grizzly bear gets just slightly heavier. My theory is that the rising young coastal brown bears are able to claim the best locations for the richest food sources after a while whereas the mountain grizzlies more or less remain the same in their dieting pattern.
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Post by brobear on Apr 27, 2020 14:38:21 GMT -5
Interesting observation 'Taker.
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Post by King Kodiak on Apr 27, 2020 19:03:10 GMT -5
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Post by brobear on May 10, 2020 2:39:45 GMT -5
Weight of Female Wolf Pups from Yellowstone National Park (2001-2006) (n =22)
Weight of Adults Female Wolf from Yellowstone National Park (2001-2006) (n= 14)
Weight of Male Wolf Pups from Yellowstone National Park (2001-2006) (n = 30)
Weight of Yearling Male Wolf from Yellowstone National Park (2001-2006) (n=6)
Weight of Adults Male Wolf from Yellowstone National Park (2001-2006) (n =26)
These three tables were made by me (The Normal Guy/Christophe Boucher) on May 6, 2020.
Sources : Multiples capture and collaring weight collections of Yellowstone National Park
For : The Domain of the Wolf, Carnivora, Wildfact and Domain of Bears.
Wolves of Yellowstone N.P.
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Post by brobear on May 10, 2020 2:43:10 GMT -5
n= 26
Total = 3022 lbs
3022/26 = 116,23 lbs = 116 lbs
116 lbs = 52.62 kg
Heaviest of the 26 adult males was 487M (132 lbs or 60 kg)
The heaviest wolf recorded in YNP History is Wolf 760M (When he was alpha male of the Yellowstone Delta Pack) (148 lbs or 67.1 kg empty belly) (2011 or 2012) (He had gained 30 lbs [15 kg] in only one year]
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Post by King Kodiak on May 27, 2020 10:04:03 GMT -5
Theundertaker45, from your new data, the average weight of the mature male kodiak bear is 1089 lbs, but we have the overall average weight of mature male polar bears at 1000 lbs. Does this really mean that kodiaks are heavier than polars? We need to analyze this situation here.
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Post by theundertaker45 on May 27, 2020 10:41:11 GMT -5
I'll edit it soon, the new average for mature male Kodiak bears is a bit above 800lbs I think, the 1089lbs are for fully grown specimens. The average weight for mature male polar bears is ~1075lbs, so the polar bear has around 275lbs over a Kodiak bear as fully grown specimens would also be larger.
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Post by King Kodiak on May 27, 2020 10:49:17 GMT -5
But on page 1, we have the average weight of mature male kodiaks at 1000 lbs. We need to revise these weights again Taker and put them the most accurate possible.
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Post by theundertaker45 on May 27, 2020 11:00:39 GMT -5
Has been done.
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Post by King Kodiak on May 27, 2020 11:07:05 GMT -5
Ok awesome, so the difference between mature adult male kodiaks and mature adult male polars (9+) is just 11 lbs? Sorry to insist, but are we sure 9+ year old kodiaks average 1089 lbs?
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Post by theundertaker45 on May 27, 2020 11:13:34 GMT -5
Mature male polar bears (5 years+) average ~1100lbs; growth patterns related to age have never been published as far as I am concerned. So when comparing the two of them, just use the 819lbs and the 1100lbs.
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Post by King Kodiak on May 27, 2020 11:21:57 GMT -5
Mature male polar bears (5 years+) average ~1100lbs; growth patterns related to age have never been published as far as I am concerned. So when comparing the two of them, just use the 819lbs and the 1100lbs. I see what you mean, still, those are humongous average weights for 5+ year olds.
But the thing that i am worried about is that 1089 lb average weight for 9+ year old kodiaks, at first view, that sounds a bit over the top, are you sure you made the right calculations Taker?
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