Resource Ramblings 2008-01
On January 28, 2008, the Wind Cave National Park (WICA) will capture 40-50 elk with a helicopter and net gun and deploy GPS collars in the final phase of a long term study to track elk movements in and out of the park.
Use of GPS collars allows determination of elk locations via remote monitoring. The collar will retrieve a position every 7 hours and store it for later downloading. Sampling at these intervals will provide 3-4 locations per elk per day and evenly distribute sampling throughout the day and night.
In addition to GPS receivers, collars will include VHF transmitters, which will operate for 3-5 days per week. The transmitters will include mortality sensors and will be checked regularly so collars can be recovered promptly if they malfunction or if elk die during the course of the study. Checks will be attempted from the ground and supplemented with aerial telemetry flights.
The objectives of this study are:
· Generate seasonal maps depicting the geographic extent and spatial distribution of activity for elk captured in WICA during the winter.
· Develop resource selection functions relating the distribution of elk activity to landscape features (e.g., vegetation, roads and trails, water sources, land ownership and management practices, etc.).
· Develop monthly estimates of the frequency, duration, and extent of elk movements across park boundaries.
· Estimate the proportion of wintering elk with seasonal home ranges that span park boundaries.
· Estimate the proportion of wintering elk that reside outside WICA during other portions of the year.
· Document responses of elk to hunting outside WICA.
· Estimate vital rates (survival and recruitment); synthesize results in models to produce updated estimates of population growth rates. Estimate mortality rates due to hunting for elk that winter within WICA.
Did You Know?
Winds caused by changes in barometric pressure are what give Wind Cave its name. These winds have been measured at the cave's walk-in entrance at over 70 mph. The winds at the natural entrance of the cave attracted the attention of Native Americans and early settlers.