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10-31-2018, 04:28 PM( This post was last modified: 11-02-2018, 03:09 AM by peter )
INTERSPECIFIC RELATIONSHIPS BETWEEN THE AMUR TIGER (P.t. altaica) AND THE BROWN (U. arctos) AND ASIATIC BLACK BEARS (U. thibetanus) - II
A - General remarks
01 - The article of Seryodkin, Miquelle, Goodrich, Kostyria and Petrunenko is the first in which interspecific relationships between Amur tigers, brown bears and Himalayan black bears in a specific region in the Russian Far East are discussed at length.
02 - Although it has a review of literature, the article is largely based on original research in the period 1992-2013.
03 - Research was carried out in the Sichote-Alin Nature Reserve and the surrounding area, including the large Ussuri river basin.
04 - In order to determine the importance of bears in the diet of tigers, 763 kills were located and 430 tiger scat samples were collected and analyzed. Furthermore, 32 dens of Himalayan black bears and 12 dens of brown bears were measured " ... to define properties that might assist in protection from the threat of a tiger attack ... " (from the abstract). Also, 641 instances of tree marking by both tigers and bears were identified.
05 - To detect tiger kills and tiger scats, radio telemetry, satellite tracking and snow-tracking were used. In total, 36 Amur tigers (16♂, 20♀) 14 brown bears (7♂, 7♀) and 17 Himalayan black bears (13♂, 4♀) were tagged. All animals (67) "... were equipped with a radio collar system ..., as well as satellite collars ... " (from the first page).
06 - As a result of the length of the project and the methods used, the conclusions on interspecific relationships between Amur tigers, brown bears and Himalayan black bears in the Sichote-Alin Nature Reserve and the surrounding area have to be regarded as well-founded and reliable.