Post by brobear on May 17, 2023 8:23:40 GMT -5
How big was the ancient Steppe Brown Bear "Ursus arctos priscus"?
In scientific literature it is quoted that Ursus arctos priscus was capable of reaching the 1000kg mark; let's take a look at the dimensions this huge brown bear would have had. The base of it is Blanchard's study on Yellowstone grizzlies with an appliable sample of over 20 male grizzlies measured for all sorts of morphometrics. Additional data comes from coastal grizzly bears and Ussuri brown bears.
Head-Body Length
1. HB-length over the curves
Standard relation based on 36 adult male brown bears: 208.25cm and 243.61kg -> 243.61/2.0825³ = ~26.97 -> 1000/x³ = ~26.91 -> x=? -> x = 3.3344 (via symbolab) -> HB-length over the curves = 333.44cm
2. HB-length straight line
Standard relation based on 50 adult male brown bears: 196cm over curves and 162cm straight line -> 162/196 = ~0.83 -> x/333.44 = ~0.83 -> x=? -> x = 275.6 -> HB-length straight line = 275.6cm
Shoulder Height
Standard relation based on 22 adult male brown bears: 203kg and 96cm SH -> 203/0.96³ = ~229.45 -> 1000/x³ = ~229.45 -> x=? -> x = 1.6335 (via symbolab) -> Shoulder height = 163.35cm
Chest Girth
Standard relation based on 27 adult male brown bears: 237.44kg and 140.44cm -> 237.44/1.4044³ = ~85.72 -> 1000/x³ = ~85.72 -> x=? -> x = 2.268 (via symbolab) -> Chest girth = 226.8cm
Neck Circumference
Standard relation based on 28 adult male brown bears: 239.5kg and 84.21cm -> 239.5/0.8421³ = ~401.07 -> 1000/x³ = ~401.07 -> x=? -> x = 1.356 (via symbolab) -> Neck circumference = 135.6cm
To conclude, the biggest known specimens of Ursus arctos priscus discovered until this day would have weighed 1000kg, measured 333cm along the body, stood 163cm tall on all fours, measured 227cm around the chest and 136cm around the neck. Coincidentally this brute's neck girth would have been about the chest girth of an average modern Yellowstone grizzly bear.
Shoulder height = 163.35cm or 5 ft 4.31 in.
Chest girth = 226.8cm or 7 ft 5.28 in.
Neck circumference = 135.6cm or 4 ft 5.39 in.
1,000 kg or 2,204.62 pounds.