From: "Thomas Bridgeland" > We do have a few, frozen wooly mammoths found in
Alaska and Siberia. I
> tried googling  for this though, and there seems to be very little info
> on the web about these mammoths. Anyone have any info? For our purposes
> some estimate of the original fat reserves would be nice.

From Cordain ( paleodiet list Aug 6 2000)

The fossil record shows
that the worldwide extinction of animals that took place at the end of the
Pleistocene occurred primarily in animals over 100 kg (220 lbs) (5).  Using
the Pitts and Bullard regression (2), a 220 lb mammal would be expected to
have about 15% body fat.  Applying our cubic regressions (4) to this value,
a 220 lb mammal would have 60 % of its total body energy as fat and 40% as
protein.  The protein value then is very close to maximal protein ceiling
(also 40  % of energy) -- hence it is not surprising that the "cutoff"
values for megafauna extinction (100 kg) corresponds almost exactly to the
value for the maximal physiological protein ceiling in humans.  In animals
weighing less than 100 kg, the entire carcass cannot be consumed unless
there is a carbohydrate source, whereas in animals weighing more than 100
kg, the entire carcass can be eaten with no worry about protein toxicity and
with no need to find a carbohydrate source.

2.      Pitts GC, Bullard TR.  Some interspecific aspect of body composition
in mammals.  In: Body composition in animals and man.  Washington D.C.:
National Academy of Sciences, 1968:45-70. (Publication 1598).

4.      Cordain L, Brand Miller J, Eaton SB, Mann N, Holt SHA, Speth JD.
Plant-animal subsistence ratios and macronutrient energy estimations in
worldwide hunter-gatherer diets. Am J Clin Nutr 2000;71:682-92.

5.      Stuart AJ.  Mammalian extinctions in the late pleistocene of
northern eurasia and north america. Biol Rev 1991;66:453-562.