Modern Weights and Measurements of Wild Lions

[Charger01]

(05-12-2022, 10:09 PM)GuateGojira Wrote:

(05-12-2022, 07:57 PM)Khan85 Wrote: I was revising the calculations I did for crater lions. 

In the paper of 1991, Dr. Brown used the chest regression equation by U.S. Seal which was as following :- (y = 1.84x - 189.11) where x = chest circumference and y = weight. 

This equation as given in the research paper is wrong, which I assume you people know by now. The problem I think is in the last part (189.11). To try and figure out the correct number, I did the most obvious correction: move the decimal point. 

y = 1.84x - 18.91

Instead of 189.11, I used 18.91. The results were better, much better. Now for a weight of 212 kg, I was getting chest circumference as 125.5 cm vs 12.44 which we would get using the wrong formula.

But, if you remember, apparently the range of chest circumference of lions measured for the 1991 paper was 127-134 cm (n = 6). So this would mean if the range was indeed 127-134 cm, mean of 125.5 cm is false.  

But I haven't seen any source or evidence that said the chest circumference of the six measured lions were 127-134 cm. @GuateGojira  @peter since you guys were there when the discussion on size of crater lions first started nearly 10 yrs ago, do you know from where was the range of 127-134 cm chest circumference of crater lions sourced? That would be really helpful. 

That range of 127-134 cm came from an old email of Dr Packer and do not have any sample size or any extra detail, it only says that the chest girts were between those numbers.

However a personal email to me, from Dr Packer, says that the actual range of chest girths for male lions in the Crater is between 120 - 143 cm, but do not specify the sample size, average of any other detail.

In a recent email Dr. Packer says "around 8 males" and 5 of which were 134.5 cm, 135 cm, 136 cm, 137 cm and 143 cm. Reply