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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: 05-15-2020, 12:23 AM by peter )

THE RELATION BETWEEN HEEL WIDTH AND WEIGHT IN WILD MALE AMUR TIGERS - V (continuation of IV)

i - Additional information

In 1996, 'Numbers, distribution and habitat status of the Amur tiger in the Russian Far East: Express-Report', Matyuskin (EN) et al. (USAID) was published. 

Chapter 3 ('Methods') has some information about the relation between heel width, gender and age:

" ... Delineating the sex-age structure of the tiger population was based on measurements of track size. There is a considerable database for estimating sex of tigers from track sizes, based on measurements of the width of the main pad of the front paw of know sex and age tigers. Besides information from zoos (Matyuskin and Yudakov, 1974), there are data on tigers in the wild that died or were killed in nature (Nikolaev and Yudin, 1993), and also on animals captured and radiocollared (Miquelle and Smirnov, unpublished). Thanks to help of Ms. S. Christie, EEP Tiger Coordinator, this year we obtained additional track size data from captive tigers. Data from 130 tigers of determined sex and age confirm previous assessments (Matyuskin and Yudakov, 1974). We summarize the main points here.

With very few exceptions, tracks with pad width equal or exceeding 10,5 cm represent males. Tracks ranging in size from 8 to 10,5 cm include both adult (and subadult) tigresses and subadult males, although females are the predominant sex in this category. Many zoo-raised males exceed 10,5 cm in their second year; similar measurements have been made on young males still traveling in a family group in the wild (Miquelle and Smirnov, unpublished). In general, pad size stabilizes when males reach 3-4 years of age. Identification of tigresses is reliable when smaller tracks (representing cubs) are found in association with them, and in these cases, all measurements of tigress pads width are within the 8 to 10 cm range. track measurements of cubs in association with mothers in winter usually range in size from 6,5 to 8 cm, but as already noted, can reach 10.5 cm ... " (pp. 8). 

Chapter has information about the pad width of two adult tigers and two cubs:

" ... For the entire winter period of 1995-1996, tiger tracks were located near the Chinese border in the upper basin of the Right Komissarovka River. Two adult individuals appeared here at different times: a male tiger with a pad width of 10,5 cm, and a female (9,0 cm) with two cubs (8,5 and 8,0 cm) that wandered independently. All four individuals periodically crossed the country border into China ... " (pp. 9).
   
j - Conclusions

1 - There is information about the relation between heel width, sex, age and weight of captive Amur tigers in 'Tracks of the Amur tiger', E.N. Matyushkin and A.G. Yudakov, 1974, in: Hunting and Hunting Economy 5, pp. 12-17. It's likely the publication of Matyushkin and Yudakov is in Russian. 

2 - Miquelle and Smirnov have unpublished information about the heel width of wild Amur tigers

3 - The heel width of wild male Amur tigers nearly always exceeds 10,5 cm. Apart from a few exceptions, the heel width of wild adult females ranges between 8,0-10,0 cm. 

4 - The heel width of male Amur tigers stabilizes when they reach 3-4 years of age.

5 - I found three records of wild male Amur tigers with a heel width of 13,5 cm. According to @tigerluver (see posts 2,468 and 2,475 of this thread), a tiger with a heel width of 13,5 cm. ranges between 221-291 kg. if all tigers would be used for the equation. If only males would be used, the predicted range is 259-337 kg. (most likely outcome 295 kg.). 

6 - The heaviest wild tiger actually weighed in the period 1992-2020 was a young adult male of 212 kg.
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Messages In This Thread
Demythologizing T16 - tigerluver - 04-12-2020, 11:44 AM
RE: ON THE EDGE OF EXTINCTION - A - THE TIGER (Panthera tigris) - peter - 05-14-2020, 11:38 PM
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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