There is a world somewhere between reality and fiction. Although ignored by many, it is very real and so are those living in it. This forum is about the natural world. Here, wild animals will be heard and respected. The forum offers a glimpse into an unknown world as well as a room with a view on the present and the future. Anyone able to speak on behalf of those living in the emerald forest and the deep blue sea is invited to join.
--- Peter Broekhuijsen ---

  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5
Brown bears and smilodon comparisons.

Australia GreenGrolar Offline
Regular Member
***
#1
( This post was last modified: 06-24-2019, 07:25 PM by GreenGrolar )

According to a credible bear enthusiast named Warsaw: 

Contrary to expectations based on their robust limbs, Smilodon kittens show the typical pattern of growth found in other large felids (such as the Ice Age lion, Panthera atrox, as well as living tigers, cougars, servals, and wildcats) where the limb grows longer and more slender faster than they grow thick. This adaptation is thought to give felids greater running speed. Smilodon kittens do not grow increasingly more robust with age. Instead, they start out robust and follow the ancestral felid growth pattern, while maintaining their robustness compared to other felids. Apparently, the growth of felid forelimbs is highly canalized and their ontogeny is tightly constrained.

carnivora.net/showthread.php?tid=6057&page=12

I am not sure which book its from but this is what he posted on Carnivora. Yet there are other data which says a smilodon has more robust bones than the brown bear. Could anyone help give me clarity on this? Thanks.
3 users Like GreenGrolar's post
Reply

Australia GreenGrolar Offline
Regular Member
***
#2
( This post was last modified: 11-13-2019, 10:09 AM by GreenGrolar )


*This image is copyright of its original author


Estimated visual comparison.
4 users Like GreenGrolar's post
Reply

Australia GreenGrolar Offline
Regular Member
***
#3

@GrizzlyClaws may I get your input on the comparison between these two animals? Thanks. The smilodon populator actually has more powerful forearms and denser bones than other big cats.
1 user Likes GreenGrolar's post
Reply

United States GrizzlyClaws Offline
Canine Expert
*****
Moderators
#4

(12-19-2019, 06:49 PM)GreenGrolar Wrote: @GrizzlyClaws may I get your input on the comparison between these two animals? Thanks. The smilodon populator actually has more powerful forearms and denser bones than other big cats.

I don't feel really competent in this domain, maybe @tigerluver could do you a favor about the limbs comparison.

But from what I read in some paper, some Smilodon populator specimens got its limb robusticity exceeded that of the Brown bear.

Let's us take a look about the comparison of the entire skeleton. IMO, S.populator could have slightly upper hand in term of the limb bones. However, the torso domain would still go to the Brown bear. As anatomically, the bear got quite different body structure from feline as a plantigrade animal, it has more centered toward the leverage of the torso.



*This image is copyright of its original author



*This image is copyright of its original author
4 users Like GrizzlyClaws's post
Reply

United States tigerluver Offline
Prehistoric Feline Expert
*****
Moderators
#5

(12-19-2019, 06:49 PM)GreenGrolar Wrote: @GrizzlyClaws may I get your input on the comparison between these two animals? Thanks. The smilodon populator actually has more powerful forearms and denser bones than other big cats.


From Christiansen and Harris (2005) and Campione and Evans (2012) we can show a comparison.

Campione and Evans (2012) report a bear humerus 400.5 mm long and 146.25 mm in circumference (robusticity index 0.365). The closest in length humerus reported by Christiansen and Harris (2005) is 387.5 mm long and 155 mm in circumference (robusticity index 0.4). So from this small sample size, Smilodon populator is more robust in the humerus. In the femur, the bear femur was 445.5 mm long and 126.25 mm in circumference (index 0.28). The longest S. populator femur in Christiansen and Harris (2005) was 390.4 mm long and 113.5 mm in circumference (index 0.29). S. populator was front heavy while bears are more balanced so that skews the comparison somewhat. Nonetheless it appears S. populator bone-wise is more robust.
3 users Like tigerluver's post
Reply






Users browsing this thread:
1 Guest(s)

About Us
Go Social     Subscribe  

Welcome to WILDFACT forum, a website that focuses on sharing the joy that wildlife has on offer. We welcome all wildlife lovers to join us in sharing that joy. As a member you can share your research, knowledge and experience on animals with the community.
wildfact.com is intended to serve as an online resource for wildlife lovers of all skill levels from beginners to professionals and from all fields that belong to wildlife anyhow. Our focus area is wild animals from all over world. Content generated here will help showcase the work of wildlife experts and lovers to the world. We believe by the help of your informative article and content we will succeed to educate the world, how these beautiful animals are important to survival of all man kind.
Many thanks for visiting wildfact.com. We hope you will keep visiting wildfact regularly and will refer other members who have passion for wildlife.

Forum software by © MyBB