Size comparisons

[Twico5]

(04-19-2022, 12:08 AM)GuateGojira Wrote:

(04-16-2022, 08:30 AM)Twico5 Wrote: That chart includes mammalian prey only. It literally says that reptiles make up 54% of jaguar diets in the screenshot you posted. Also what? Florida panthers are smaller than belizean jaguars? Obviously not true. Yes, they do have a better prey base, but for some reason theyre still small, just not smaller than belizean jaguars. They are heavier, taller and longer and if youd like i can show proof of this

“in order to have similar body masses, jaguars need to have a lower prey base and small size than pumas”. So then howcome when they have the same prey base they look like this? It seems as if jaguars dont need smaller prey bases to be larger but instead specific reptillian prey species in order to be puma sized or larger! Two adult females from nw mexico btw:

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*This image is copyright of its original author

*This image is copyright of its original author

*This image is copyright of its original author

I see that you don't even understood what I told you.

First of all, you don't even read the image that I post, so here it is again:

*This image is copyright of its original author

*This image is copyright of its original author

You can clearly see that they DID include reptiles, not just mammals as you claim. In fact, take the time to read the image as it self explanatory, check that the reptiles importance drop to 0.9%, read the full document (Prey Preferences of the Jaguar Panthera onca Reflect the Post-Pleistocene Demise of Large Prey - Hayward et al, 2016).

You don't even understood the example of the Florida panthers and the Belize jaguars. Again, the jaguars in Belize had lower prey base while the pumas from Florida had a better prey base and larger prey animals, the point is to show that only when the prey is low then the jaguar is going to be of the same average size than a puma population, but when both species had the same prey base, jaguars are definitelly going to be heavier. You claim to show proof, but you forget that the same images that I showed previously shows that pumas is Florida are bigger than jaguars in Belize, but the problem is that you are completelly ignoring the context of this phenomenon, which is directly related with prey base. There is your error in your analogy.

You insist with the reptiles as principal prey base, but that is completelly incorrect, and the previous study shows your error. By the way, in the images you say that you show "adult" females from New Mexico, well you should remember that jaguars are animals that need water and that dry habitat is not the best for them, while pumas are better adapter to drier climates. By the way, can you show that those animals, specially the jaguar, is really an adult?

No sir the 1st image you posted has 0 reptiles listed in it. The 1st image has crab-eating foxes and agoutis but no yacare caiman yeah ok buddy. 

 I never said jags preyed on reptiles more than they did on mammal species. My point was that they had the ability to take advantage of large reptile populations while pumas cant. 

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*This image is copyright of its original author

Mean prey size for jags and pumas are the same in xeric areas, and similar in forests but only in floodplains is the jag’s mpw double that of the puma.

Here are some weights i found for young florida panthers: 

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*This image is copyright of its original author

*This image is copyright of its original author

As you can see these are all young males who weighed 55-63kg. The last ss mentions a 3 year old male who weighed 55kg which is the same an adult male jaguar from belize. 

*This image is copyright of its original author

And here is a 2 year old male that weighed 65kg. So young male florida panthers weigh as much as adult male prime belizean jaguars wow! Pumas in cypress NP mainly prey on deer, raccoon, and rabbit. Reply