The Teenage Beast

[brobear]

Jul 22, 2024 13:57:28 GMT -5 brobear said:

Jan 23, 2023 5:02:04 GMT -5 brobear said:

Male Brown Bear / Male human equivilant:

0 until his first year - cub / from baby to toddler to young child.
1 year until he reaches 2 - yearling / child roughly 8 yrs. old.
2 years old until he reaches 4.5 years old - adolescent or juvenile. / from 9 to 12 yrs. old.
4.5 years old until he reaches 6 - subadult. / teenage boy from 13 to 15 yrs. old.
6 years old until he reaches 9 - young adult./ teenage boy from 16 to 19 yrs. old.
9 years old until he reaches 20 - full-grown male bear. / from 20 to 60 yr. old man.
20 years old and after - elderly (over the hill).

wildfact.com/forum/ - ON THE EDGE OF EXTINCTION - A - THE TIGER (Panthera tigris) - by Peter:
The difference between young adults (5-8 years of age) and mature adults (9 years and over) is pronounced. Mature bears are not longer, but heavier. In males in particular, the difference is outspoken. Individual variation in both males and females is significant. 
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domainofthebears.proboards.com/thread/944/longevity-maturity

If or when a tiger ever kills an "adult" male brown bear (which I'm not expecting to happen), unless the bear is at least 9 years old, then the tiger did not kill a full-grown male brown bear. If a tiger kills a male brown bear 20 years old or older, then the tiger killed an elderly bear. No bragging rights.

From the age of 4.5 years until he turns 9, a male brown bear is a teenager. 

[brobear]

Tigers killed by bears:

According to confirmed accounts, every tiger killed by a brown bear has been tiger cubs, adult tigress, or young male tigers including both adolescent and sub-adults.

Cubs; no explanation needed.
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Adult tigress: a tigress might be willing to fight in defense of her cubs. She might find herself desperate enough to attempt to defend a carcass, knowing that her cubs are hungry.
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Sub-adult (teenager) male tiger: Just like a teenage boy, this young tiger probably thinks himself bigger and stronger than he actually is. A teenager is prone to make foolish decisions. A male tiger; below the age of full maturity, might attempt to defend a carcass from a full-grown male brown bear. He might even be foolish enough to attempt to ambush a full-grown male brown bear.
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Remember; it is the tiger who does the hunting. A fully-mature male tiger is wise enough to know better than to ambush or fight with a full-grown male brown bear. A full-grown tiger is not suicidal. 

[brobear]

we have probably all seen (video) of a black-back (teenage) gorilla challenging a silverback. This never works out well for the black-back.

[brobear]

fantasticstruggle788; point taken.

domainofthebears.proboards.com/thread/1314/amur-tiger-ussuri-brown-accounts?page=2

1c - Predation on tigers

Bears do not habitually hunt tigers, but it is known adult male brown bears consume tigers killed in disputes. It seems some adult male brown bears, in some circumstances, deliberately target tigers (posts 520 and 536). Kostoglod mentioned a case in which a bear followed a tiger for a long distance (Chapter 19). The tiger escaped, but another one was attacked, killed and eaten. Although tigresses sometimes perish in fights with male brown bears, the number is incidents is too limited to get to general statements.

In 2010, two tigresses, a subadult (19 months of age) and an 8-year old ('Vera') with two (about 18 months old) cubs, were killed by brown bears (post 520). Apart from the fact they were killed by brown bears, not much was known. The young tigress, behaviourwise, showed signs of disease and it is also known at least 4 other tigers (two subadult males, one adult female and one adult male) displayed abnormal behaviour before their death (Miquelle). There is no additional information on the 8-year old tigress mentioned above.

In the last 50 years, according to Alexious3, at least two adult male tigers have been killed by brown bears (post 568). One perished in 1960 and it could be this is the case used by Sysoev for his fictional story on 'Amba'. Another tiger died after a fight in 1972. Rukovsky mentioned another incident (post 70). Two of the three male tigers killed, at roundabout four years of age, were young adults. The third one was described as a medium-sized animal (age unknown).

There are other accounts of male tigers killed by brown bears (Sysoev mentioned two cases and Bonns mentioned an incident near or in a river in 1943), but these, as far as is known, have not been acknowledged by researchers. The number of tigers killed in fights between 1943-1996 (referring to the table posted earlier) indicate there could be more cases (posts 17 and 55). Apart from one, all fights referred to in the table (post 55) were corroborated by Russian researchers, but in most incidents details were missing. It is, however, known brown bears were involved in most incidents.

The information available suggests most tigers killed were killed in winter. As brown bears hibernate in winter, it has to be assumed non-hibernating bears ('Shatuns') were involved in most of these. Schatuns are desperate animals and most seem to perish. This means many would be inclined to attack any animal, tigers and other (hibernating) bears included (post 584).

Although at least one was a smallish female who killed and ate a much larger hibernating male brown bear, most Schatuns seem to be males. As most of the 'large brown bears' killed by tigers mentioned above were killed in winter, it has to be assumed some, if not all, of these were Schatuns. Same for tigers killed in winter.

[brobear]

My point being, I have not found any confirmed case of a full-grown (5+ year old) male tiger killed by a brown bear. Of course, this does not mean it hasn't happened. Miquelle mentions one adult male tiger, but (sadly) no age given.