Predation on Sun Bears by Reticulated Python in East Kalimantan, Indonesian Borneo

he main natural predator of Asian black bears is the tiger, although leopards,[40] and packs of wolves[3] and dholes[30] can be a threat. Eurasian lynxes are a potential predator of cubs.[3] Black bears usually dominate Amur leopards in physical confrontations in heavily vegetated areas, while leopards are uppermost in open areas, though the outcome of such encounters is largely dependent on the size of the individual animals.[41] Leopards have been known to prey on cubs younger than two years old.[40]

Кавказский леопард убил двух мелких медведей:

In Caucasus preserve, in June 1931, it was recorded that a leopard killed two small bears.

А вот нападение на самку губача:

n 1968, Kurt and Jayasuriya report of a sloth bear eaten by a leopard at Yala National Park, India. The details? The bear victim was either a young adult or sub adult female sloth bear described as three-quarter grown. The encounter occurred by a palu tree but whether the leopard was hunting the bear or if the meeting was a chance encounter is unclear. The authors stated the park staff were have to recorded only one other meeting between these two species in Yala National Park where a leopard was killed by a bear. The seriously injured bear was later destroyed by park officials. No other details of the encounter were provided.
Kurt, F. and Jayasuriya, A. (1968). Notes on a dead bear. Loris, 11: 182-183.

Тут драка между леопардом м губачом - http://www.youtube.com/watch?v=_mxN-ZCV … r_embedded
Да, постановочная, а точнее просто стравили зверей для съемок. Звери дерутся не на шутку. Медведь крупнее леопарда. Видно, что оба драться не хотят, но медведь улучив момент ретировался. В общем, ничья.

Тут драка между пумой и барибалом - http://www.youtube.com/watch?v=23Fvtqeb … embedded#!
Видно что пума слабее, но за счет ловкости и скорости не дает себя подмять. Тоже ничья. Медведь явно сильнее, но ничего не смог сделать с пумой. А что было бы если звери были соразмерны? Или вместо пумы был бы ягуар? Не известно...

Отредактировано Кот (26 September 2012 03:22:03)

http://www.youtube.com/watch?v=rt8LAntbTS8

Grrraaahhh :

http://img689.imageshack.us/img689/1338/kodiakbearskullsizevsag.jpg


HARVESTING KODIAK BEARS:

HARVEST

We investigated the cause of deaths of all the radiocollared bears used for the survival rate analyses (Table 2.1).  The major cause of death for males was hunter harvest (91%), while most females died of natural (non-anthropogenic) causes (54%).  There were no significant differences between the causes of death reported for females from the various study areas (ANOVA, F= 1.43, P = 0.286), however, there was a significant difference between males and females (x3,11 2 = 148.42, df = 3,  P<0.001).  During the study period (1982-2004), overall annual harvest density for the study areas was 17.07 independent bears/1,000 km2, ranging from 13.34 in TLH to 22.58 in ALK (Table 2.2).  The harvest rates of independent bears ranged from 6.68% in TLH to 10.33% on the ALK, and males dominated the harvest in all areas (68.4%), ranging from 63.7% in TLH to 72.2% in ALK.    The number of bears harvested remained relatively consistent during the study period, but was higher than during the previous 20 years (Table 2.3).  We also saw an increase in the number and percentage of the harvest that consisted of trophy-sized males (Figure 2.2).


We analyzed data from 3,267 male bears that were harvested on the Kodiak Archipelago, had unbroken skulls at the time of sealing, and had a premolar tooth that was suitable for aging.  Data from these samples revealed that the percentage of skulls reaching trophy size (n = 283) increased with the age of the bear, with 56.1% of the males in the oldest age class (>20 years) being trophy-sized (>71 cm).  Bears in the >68 cm category (n = 710) also increased with age, including 91.2% of the males in the oldest age class (Figure 2.3).  The relationship between male skull size and age was also evident when we compared the average annual skull sizes and ages for bears harvested from 1982-2004.  The correlation between these data was significant (P < 0.001) with r*2* = 0.77 (n = 22).


Skull size-age data collected as a result of the regulation changes clearly demonstrated that age structure of the male bear population has a direct impact on the number of large bears available to hunters.  On Kodiak, over 90% of male bears have the potential to reach skull sizes exceeding 68 cm, and over half of the bears can attain trophy size if they live long enough.  Therefore, when managing for a population that retains a segment of large males, it is important to establish regulations that consider survival rates of adult males as well as productive females.  During this study, hunting regulations for Kodiak bears were crafted to distribute harvest throughout the archipelago and reduce hunter efficiency.  While season dates included times when hide quality was at its peak, they are also set to afford protection to females that have longer denning periods.  Prohibiting harvest of maternal females and their dependent cubs further protected productive females.   



The number of trophy males in the population is calculated by multiplying the percentage of > 10-year old males that are projected to have 71 cm (28”) or greater total skull sizes (input variable) by the projected number of males that are at >10 years old, based on a life table.  The life table is derived from the initial male population multiplied by the estimated male survival rates (subadult plus adult rates).  In making these calculations we assumed: 1) there is a consistent percentage of > 10 year old males that have >71 cm skull sizes and that percentage can be gleaned from harvest data; 2) cementum age data are accurate; and, 3) there is a direct relationship between male bear age and the percentage of trophy-sized bears, and an inverse linear relationship of the number of males available in each age category (i.e., fewer bears in older age categories).


PDF:  http://www.google.com/url?sa=t&sour … YgSNCHaaZA


Kodiak Bear Fact Sheet

Kodiak bears are the largest bears in the world. A large male can stand over 10' tall when on his hind legs, and 5' when on all four legs. They weigh up to 1,500 pounds. Females are about 20% smaller, and 30% lighter than males.

http://www.wc.adfg.state....ex.cfm?adfg=bears.trivia


A grizzly bear boar may weight 700lbs, averaging perhaps 350-500lbs, while a healthy, mature adult male would not generally be much lower than 350-400lbs. A large sow could weigh 500lbs, though mature females might average between 300-400lbs. By comparison, an Alaskan coastal grizzly bear boar could weigh between 800-1200 pounds, and a female could range between 600-800lbs. Male Kodiak bears can weigh as much as 2000lbs, though an average weight for mature animals would be between 1200-1500lbs. A female Kodiak might weigh 1000lbs, though an average adult weight might be around 700lbs.

http://www.ursusinternational.org/en/factsgriz.html




* Ursus arctos middendorffi - Alaskan brown bear usually reaches 360 - 545 kg by eight or nine years old and may reach 770 kg (1,700) lb. (B180.w3)


http://wildlife1.wildlife...1Ursus_arctosAMWtHt.html

Отредактировано Wladimir (29 December 2012 02:12:23)

Медведь без шерсти. Хотя и непонятно, что за подвид, тем не менее- без волосни уже неособо-то внушает.

Бурого побрей- такое же жалкое зрелище будет. А если еще полтора центнера жира слить...

Бурый мощнее очкового.

Лысый очковый медведь на фото - самка. При этом довольно мощная. А бурый еще мощнее.
И конечно он мощнее любой кошки, но не быстрее.

Натуралист, это моделька со стекляшками в глазу. Ни один медведь не будет таким накачанным, сплошное ожирение. Когда видишь 400кг мишек, мысленно вычитай 150кг жира.

Иван Сергеевич :

Натуралист, это моделька со стекляшками в глазу. Ни один медведь не будет таким накачанным, сплошное ожирение. Когда видишь 400кг мишек, мысленно вычитай 150кг жира.

Медведь настоящий. Это препарат, изготовленный по способу пластинации (замена тканевых жидкостей полимерами). Объём мышц сохранился таким же, каким был при жизни.
http://www.zimbio.com/Body+World,+Salt+ … Exhibition

Отредактировано Elephas Maximus (03 January 2013 17:36:26)

Причем этот медведь, о котором выше написал Владимир, относится к номинативному подвиду (по крайней мере согласно Собанскому).

Есть более интересные вопросы для обсуждения. Например, все никак не могу взять в толк. Почему медведи потеряли полностью ключицу, а вот кошки нет. Да что там кошки, у собак она тоже есть, правда не всегда.
Очень странно, так как собакам по идее ключица нахрен не нужна, а вот медведям (вроде) да...

Отредактировано Кот (04 January 2013 01:13:35)

Отредактировано Кот (05 January 2013 15:50:38)

О нем давно уже писали и много, в теме про медведей в доисторическом разделе.

Алекс :

Иван Сергеевич :

Самый большой медведь в истории- естественно, плейстоценовый
Arctotherium angustidens, вес предположительно достигал 1600 кг. http://animalworld.com.ua/news/Juzhnoam … ym-bolshim

Немного не в тему ,но линейно самый большой арктодус симус ,  арктотерий самый тяжелый.

Я знаю, что он малость выше, но не знаю, длиннее ли? Вряд ли, имхо.