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ON THE EDGE OF EXTINCTION - A - THE TIGER (Panthera tigris)

peter Offline
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( This post was last modified: 09-11-2016, 04:31 PM by peter )

(09-10-2016, 11:55 PM)GrizzlyClaws Wrote: @peter

1. His natural gum line is about 77-78 mm, but when the tiger has reached his adulthood, his gum will start to recede, so his gum line will move upward to 80 mm. And his canine diameter also by far exceeds the 383 mm wild skull measured by Mazak. Do you think the magnitude of his size could be on par with the Duisburg specimen and the wild giant mentioned by Jankowski?

2. That's what I thought, those non-defatted skulls could be less than a century, and the even older skulls would be naturally defatted.

3. So the tiger skulls should also show some morphological diversity, right? Otherwise, maybe it is a sign of inbreeding because of the smaller remaining population?

1 - Likely. The reason is the positive correlation between canine length and skull length in skulls of captive adult male Amur tigers. As I also think there is a positive correlation between body length and skull length, chances are the owner of the canine you posted was a very large male tiger. He could have been similar in size to the giants you mentioned, as skulls of wild tigers often are a bit longer than skulls of captive animals. Even if we allow for the effect of individual variation, the tiger must have been a very large animal.

The length of the upper canine is impressive, but it is the width at the gum line in particular which is remarkable. It's over 30% wider than the biggest upper canines I measured (...). As there is a strong correlation between width and status (captive or wild) in tigers, it's very likely the owner of the canine was a wild male.

2 - It's difficult to get to a statement, but I'd say it could be well over a century. In most cases, however, it's less. The difference in weight between a defatted skull and one of similar size and structure that wasn't often is significant.

3 - Yes, skulls of wild tigers often show quite a bit of individual variation. Same for other big cats. When individual variation is very limited or almost lacking, there often is a problem. Skulls are the best means to argue against captivity. Compared to skulls of wild tigers, many skulls of captive tigers, apart from being shorter, wider and less elevated, are asymmetrical. Teethwise, the difference often is very outspoken. One could say these skulls are an expression of illness. I saw quite a number of skulls of adult captive big cats who perished as a result of illness when they had reached adulthood. They were shorter and smaller as a rule, less dense, not as heavy, not completely developed and not seldom quite asymmetrical. If one would describe skulls of healthy adult wild big cats as muscular and well developed, skulls of many captive big cats should be described as parodies. The difference often can be seen at a glance.
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Messages In This Thread
RE: ON THE EDGE OF EXTINCTION - A - TIGERS (Panthera tigris) - peter - 09-11-2016, 04:26 PM
Demythologizing T16 - tigerluver - 04-12-2020, 11:44 AM
Tiger Data Bank - Apollo - 07-28-2014, 09:54 PM
RE: Tiger Data Bank - Apollo - 07-28-2014, 10:02 PM
RE: Tiger Data Bank - Apollo - 07-29-2014, 12:56 AM
RE: Tiger Data Bank - peter - 07-29-2014, 07:05 AM
Tiger recycling bin - Roflcopters - 09-04-2014, 01:36 AM
RE: Tiger recycling bin - Pckts - 09-04-2014, 02:22 AM
RE: Tiger recycling bin - Roflcopters - 09-05-2014, 01:01 AM
RE: Tiger Data Bank - Apollo - 11-15-2014, 10:07 PM
RE: Tiger Data Bank - Apollo - 11-15-2014, 10:57 PM
RE: Tiger Data Bank - Apollo - 11-15-2014, 11:33 PM
RE: Tiger Data Bank - Apollo - 02-19-2015, 11:25 PM
RE: Tiger Data Bank - GuateGojira - 02-23-2015, 11:36 AM
Status of tigers in India - Shardul - 12-20-2015, 03:23 PM
RE: Tiger Directory - Diamir2 - 10-03-2016, 04:27 AM
RE: Tiger Directory - peter - 10-03-2016, 06:22 AM
Genetics of all tiger subspecies - parvez - 07-15-2017, 01:08 PM
RE: Tiger Predation - peter - 11-11-2017, 08:08 AM
RE: Man-eaters - Wolverine - 12-03-2017, 11:30 AM
RE: Man-eaters - peter - 12-04-2017, 09:44 AM
RE: Tigers of Central India - Wolverine - 04-13-2018, 01:17 AM
RE: Tigers of Central India - qstxyz - 04-13-2018, 08:34 PM
RE: Size comparisons - peter - 07-16-2019, 05:28 AM
RE: Amur Tigers - peter - 05-20-2021, 07:13 AM
RE: Amur Tigers - Nyers - 05-21-2021, 08:02 PM
RE: Amur Tigers - peter - 05-22-2021, 08:09 AM
RE: Amur Tigers - GuateGojira - 04-06-2022, 12:59 AM
RE: Amur Tigers - tigerluver - 04-06-2022, 01:08 AM
RE: Amur Tigers - tigerluver - 04-06-2022, 09:08 AM
RE: Amur Tigers - tigerluver - 04-06-2022, 11:30 PM
RE: Amur Tigers - peter - 04-08-2022, 07:27 AM



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