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Telemetry: Comments and Suggestions from the Coastal Grizzly Project 1983 Derocher, Andrew E.
1984
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Abstract: Central to the objectives of the Coastal Grizzly Project is the locating of collared grizzly bears to determine habitat use. The system used in the Coastal Grizzly Project was centred around a 4-element Vagi antenna and a gyro compass (both mounted in a truck) and a scanning Telonics receiver. The first step in locating a collared bear was a general reconnaissance, usually starting near the area of the last fix and travelling toward the animal. Once the bear was roughly located, by using signal strength and directionality, an accurate bearing could be taken. Once a bearing had been taken, the process was repeated at the next station until a minimum of three bearings, preferably four or five, were obtained. From these data, it is possible to triangulate and determine animal location. Many factors influence the signals strength and directionality and affect the accuracy and precision of the telemetry. For accurate telemetry, the influences of weather, topography, vegetation, and distance must be considered. The telemetry system in the Coastal Grizzly Project was fair in its overall performance. Unless accuracy can be increased and obtained for all areas, bias may result in the overall habitat analysis. The degree to which the telemetry 1oca t ions obtained in 1983 can be used for habitat analysis, if not ground truthed, may be questionable as many variables influence the accuracy and it was known that some fixes were inaccurate. Changes to the system in 1984 should help remedy the situation and increase the efficiency significantly, aiding in meeting the objectives of the project.
 
Derocher, Andrew E.. 1984. Telemetry: Comments and Suggestions from the Coastal Grizzly Project 1983. Ministry of Environment, Ministry of Forests. Wildlife Working Report. wr3
 
Topic: Conservation + Mgmt (Wildlife, Fish, Plant)
Keywords: gyro compass, radio collar, home range, habitat requirement, Kimsquit, bc, british columbia
ISSN:  Scientific Name: Ursus arctos
ISBN:  English Name: Grizzly Bear
Other Identifier: whr11 wilidfe habitat research report WHR-11
 
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