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Post by Gorilla king on Nov 20, 2021 7:38:41 GMT -5
Nice accounts arctozilla .
Reply #78, from Lewis and Clark, 215 years ago those grizzlies were larger than today and even more predatory, so they were able to kill more adult bison, however, most were still females.
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Post by arctozilla on Nov 20, 2021 7:47:36 GMT -5
@king Kodiak
In addition I have to say, at one point, that adult males of large bovids are powerful foes for any predators. Of course grizzlies would be in most of time careful to bull bisons, because they're though foe and every predators actually do that. For basic understand African lions do actually the same thing to Cape buffaloes, lone lions usually don't came close to bull Cape buffaloes due of being powerful and formidable foes. And about tiger and Indian bison... The Gaur actually has the title of Tiger Killer.
That's something cat fanatics don't understand.
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Post by fluffyfatbear on Nov 23, 2021 20:23:09 GMT -5
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Post by Gorilla king on Nov 23, 2021 20:33:24 GMT -5
Very Interesting but already posted on reply #5 of this thread, lol.
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Post by arctozilla on Dec 19, 2021 12:15:41 GMT -5
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Post by Gorilla king on Dec 19, 2021 12:21:11 GMT -5
Nice find there. And it sounds like a female brown bear:
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Post by arctozilla on Dec 19, 2021 13:37:32 GMT -5
/\ good point. So it was a girl vs girl.
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Post by arctozilla on Dec 27, 2021 6:07:43 GMT -5
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Post by Montezuma on Jan 3, 2022 21:06:35 GMT -5
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Post by Montezuma on Jan 3, 2022 21:12:02 GMT -5
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Post by Montezuma on Jan 3, 2022 21:18:23 GMT -5
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Post by fluffyfatbear on Jan 4, 2022 0:28:16 GMT -5
The diet of the brown bear Ursus arctos in the Pasvik Valley, northeastern Norway Inga-Lill Persson, Steinar Wikan, Jon E. Swenson & Ivar Mysterud Persson, I-L., Wikan, S., Swenson, J.E. & Mysterud, I. 2001: The diet of the brown bear Ursus arctos in the Pasvik Valley, northeastern Norway. - Wildl. Biol. 7: 27-37. The seasonal composition of and the annual variation in the diet of the brown bear Ursus arctos in the Pasvik Valley, northeastern Norway, were estimat- ed based on the analysis of 137 bear scats. The importance of moose Alces alces and reindeer Rangifer tarandus in the diet was given special attention, because results from Russia suggest that brown bears are generally more car- nivorous in the north. Ungulates, especially adult moose, comprised the most important food item for bears in the Pasvik Valley during spring and summer, contributing 85 and 70% of the Estimated Dietary Energy Content (EDEC), respectively. During autumn, when the bears have to build up fat reserves and increase lean body mass for hibernation, berries were the most important food item, contributing 49% of the EDEC, but ungulates were still important, contributing 30% of the EDEC. Insects and vegetation were of low importance in all seasons. The proportion of ungulates in the diet of brown bears in the Pasvik Valley was considerably higher than farther south in Scandinavia, and this regional difference is important concerning bear and moose management in northern areas. www.researchgate.net/publication/252463787_The_diet_of_the_brown_bear_Ursus_arctos_in_the_Pasvik_Valley_northeastern_Norway |
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Post by Gorilla king on Feb 18, 2022 20:09:42 GMT -5
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Post by Gorilla king on Apr 5, 2022 9:55:10 GMT -5
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Post by Gorilla king on May 12, 2022 17:12:25 GMT -5
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Post by Gorilla king on May 26, 2022 19:57:45 GMT -5
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Post by brobear on May 27, 2022 2:20:26 GMT -5
What is a Goiat?
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Post by Gorilla king on May 27, 2022 4:05:47 GMT -5
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Post by Gorilla king on Jun 1, 2022 17:34:19 GMT -5
Effects of grizzly bear predation on muskoxen in northeastern Alaska
Abstract and Figures
Muskoxen (Ovibos moschatus) are thought to be highly effective at defending themselves from predators. However, a decline in muskox abundance in northeastern Alaska, USA, that coincided with several instances of grizzly bear (Ursus arctos) predation observed during 2000-2006 raised concerns about the effects of predation on this population. In response, from 2007 to 2011 we estimated rates of reproduction and survival and determined rates and causes of muskox mortality on the arctic coastal plain of northeastern Alaska. Annual counts of muskox abundance (x = 191) and estimates of population growth (x = 0.94) indicated a stable or slowly declining population. Annual natality ranged from 0.45 to 0.86 (x = 0.68) births/adult female, whereas annual survival ranged from 0.40 to 0.63 (x = 0.49) for calves and from 0.73 to 0.91 (x = 0.83) for adult females. Predation by grizzly bears was the most common cause of death among cases where a cause could be identified, accounting for 58% and 62% of deaths of calves and adults, respectively. Most bear predation occurred during late winter and spring when little other food was available to bears. The importance of predation compared with other mortality factors, and the change from a growing to a declining muskox population, suggest a change in either predator abundance or behavior. There is no evidence that bear abundance changed dramatically during this period, but abundance of moose (Alces alces) and caribou (Rangifer tarandus) declined substantially in the area where the muskox decline was most pronounced. This suggests bears may have increased predation on muskoxen in response to reduced availability of other ungulates. Maintaining diversity of native ungulates may help bears cope with the natural fluctuations in prey abundance often seen in arctic ecosystems. © 2017 International Association for Bear Research and Management.
www.researchgate.net/publication/318740093_Effects_of_grizzly_bear_predation_on_muskoxen_in_northeastern_Alaska
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Post by Gorilla king on Jun 9, 2022 13:11:43 GMT -5
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