scholarly journals Evaluation of habitat use by Rocky Mountain elk (Cervus elaphus nelsoni) in north-central New Mexico using global positioning system radio collars

1997 ◽  
Author(s):  
J. Biggs ◽  
K. Bennett ◽  
P.R. Fresquez
Keyword(s):  
New Mexico ◽  
Habitat Use ◽  
Global Positioning System ◽  
Cervus Elaphus ◽  
Rocky Mountain ◽  
Positioning System ◽  
North Central ◽  
Cervus Elaphus Nelsoni ◽  
Global Positioning ◽  
Rocky Mountain Elk

scholarly journals Choosing Sampling Interval Durations for Remotely Classifying Rocky Mountain Elk Behavior

2016 ◽  
Vol 7 (1) ◽  
pp. 213-221 ◽  
Author(s):  
Adam J. Gaylord ◽  
Dana M. Sanchez ◽  
John Van Sickle
Keyword(s):  
Global Positioning System ◽  
Rocky Mountain ◽  
Potential Effect ◽  
Sampling Interval ◽  
Positioning System ◽  
Activity Monitors ◽  
Global Positioning ◽  
Sampling Intervals ◽  
Rocky Mountain Elk ◽  
And Behavior

Abstract Dual-axis accelerometer global positioning system collars can be used to remotely record the activity level and behavior of free-ranging animals, but inter- and intraspecific variations in motion among behaviors necessitate calibration for each species of interest. To date, little work has been done to determine the best duration for sampling intervals when using activity monitors that incorporate dual-axis accelerometers. However, we expected that the duration of behaviors relative to the duration of sampling intervals could affect the accuracy of calibration and behavior classification models. Furthermore, we considered the potential effect of winter diet supplementation (hay) on behavior classification. We used Lotek 4500 global positioning system collars featuring dual-axis accelerometer activity monitors to collect data for calibration and classification trials on Rocky Mountain elk Cervus elaphus nelsoni. We used discriminant function model structures to determine the number of accurately classifiable behaviors that could be derived from data sampled over three sampling interval durations (5 min, 152 s, and 64 s) while also considering the potential effect of hay supplementation on classification. Our results suggest that investigators should ascertain whether their focal elk herd accesses or might access supplemental hay before deployment and analysis of activity sensor data. Similarly, researchers must weigh priorities when choosing a sampling interval, because no optimal solution emerged from our investigation. For example, of our acceptable models, only those constructed using 64-s intervals were able to distinguish short bouts of running. However, only models constructed with 5-min intervals accurately classified browsing while also maximizing the number of behaviors identified.

scholarly journals Ready for bed: pre-hibernation movements and habitat use by Fowler’s Toads (Anaxyrus fowleri)

2018 ◽  
Vol 132 (1) ◽  
pp. 46-52
Author(s):  
David M. Green ◽  
Katharine T. Yagi
Keyword(s):  
Habitat Use ◽  
Global Positioning System ◽  
Late Summer ◽  
The Body ◽  
Positioning System ◽  
Radio Tracking ◽  
Water Line ◽  
Global Positioning ◽  
Radio Transmitters ◽  
Early Fall

We used radio-tracking to investigate movement patterns and habitat use of Fowler’s Toads (Anaxyrus fowleri) during late summer and early fall in a relatively undisturbed lakeshore dune and beach habitat at Long Point, Ontario. Small radio transmitters were fitted to 11 adult toads with an external harness made from fine surgical plastic tubing wrapped around the body behind the front limbs. We located radio-tagged toads morning and evening, for a maximum of 9 days, recording their locations using Global Positioning System units. Initially, the toads were located on the upper beach or in the fore-dunes during the day, either dug in under the sand or hiding beneath debris; in the evening, they were generally active on the lower beach close to the water line. After a storm and the onset of cooler autumn weather, the toads tended to move further from the water line. They also curtailed their nightly activity and retreated deeper into the sand. As this sort of behaviour was not observed during the summer, we interpret it as pre-hibernation movement to more stable sites away from the beach where the animals can burrow deeply into the sand to lie dormant during the winter.

Causes and Consequences of Timing Errors Associated With Global Positioning System Collar Accelerometer Activity Monitors

2014 ◽  
Vol 5 (2) ◽  
pp. 372-379 ◽  
Author(s):  
Adam J. Gaylord ◽  
Dana M. Sanchez
Keyword(s):  
Global Positioning System ◽  
Animal Behavior ◽  
Cervus Elaphus ◽  
Activity Monitor ◽  
Positioning System ◽  
Activity Monitors ◽  
Timing Errors ◽  
Global Positioning ◽  
Free Ranging ◽  
Monitor Data

Abstract Direct behavioral observations of multiple free-ranging animals over long periods of time and large geographic areas is prohibitively difficult. However, recent improvements in technology, such as Global Positioning System (GPS) collars equipped with motion-sensitive activity monitors, create the potential to remotely monitor animal behavior. Accelerometer-equipped activity monitors quantify animal motion with different amounts of movement presumably corresponding to different animal activities. Variations in motion among species and differences in collar design necessitate calibration for each collar and species of interest. We paired activity monitor data collected using Lotek GPS_4400 collars worn by captive Rocky Mountain elk Cervus elaphus nelsoni with simultaneously collected behavior observations. During our initial data screening, we observed many sampling intervals of directly observed behavior that did not pair to activity monitor data in a logical fashion. For example, intervals containing behaviors associated with little or no motion sometimes aligned with relatively high activity monitor values. These misalignments, due to errors associated with collar timekeeping mechanisms, would likely result in inaccurate classification models. We corrected timing errors by using defined breaks in animal behavior to shift times given by collar output, improving the average correct classification rate 61.7 percentage points for specific behaviors. Furthermore, timing errors were significantly reduced by increasing the GPS fix rate, by using a sampling interval divisible by 8 seconds, and by accurately timing the initial collar activation. Awareness and management of collar timing error will enable users to obtain the best possible estimates of true behavior when calibrating these collars and interpreting data from free-ranging animals.

scholarly journals Detection of PrPCWDin Postmortem Rectal Lymphoid Tissues in Rocky Mountain Elk (Cervus Elaphus Nelsoni) Infected with Chronic Wasting Disease

2006 ◽  
Vol 18 (6) ◽  
pp. 553-557 ◽  
Author(s):  
Terry R. Spraker ◽  
Thomas L. Gidlewski ◽  
Aru Balachandran ◽  
Kurt C. VerCauteren ◽  
Lynn Creekmore ◽  
...  
Keyword(s):  
Cervus Elaphus ◽  
Chronic Wasting Disease ◽  
Rocky Mountain ◽  
Lymphoid Tissues ◽  
Wasting Disease ◽  
Cervus Elaphus Nelsoni ◽  
Rocky Mountain Elk

Use of Acepromazine and Medetomidine in Combination for Sedation and Handling of Rocky Mountain Elk (Cervus elaphus nelsoni) and Black Bears (Ursus americanus)

2014 ◽  
Vol 50 (4) ◽  
pp. 979-981 ◽  
Author(s):  
Lisa L. Wolfe ◽  
Heather E. Johnson ◽  
Mark C. Fisher ◽  
Michael A. Sirochman ◽  
Benjamin Kraft ◽  
...  
Keyword(s):  
Cervus Elaphus ◽  
Ursus Americanus ◽  
Rocky Mountain ◽  
Black Bears ◽  
Cervus Elaphus Nelsoni ◽  
Rocky Mountain Elk

scholarly journals VALIDATION OF A BRUCELLA ABORTUS COMPETITIVE ENZYME-LINKED IMMUNOSORBENT ASSAY FOR USE IN ROCKY MOUNTAIN ELK (CERVUS ELAPHUS NELSONI)

2003 ◽  
Vol 39 (2) ◽  
pp. 316-322 ◽  
Author(s):  
Clayton K. Van Houten ◽  
E. Lee Belden ◽  
Terry J. Kreeger ◽  
Elizabeth S. Williams ◽  
William H. Edwards ◽  
...  
Keyword(s):  
Immunosorbent Assay ◽  
Cervus Elaphus ◽  
Brucella Abortus ◽  
Rocky Mountain ◽  
Enzyme Linked Immunosorbent Assay ◽  
Cervus Elaphus Nelsoni ◽  
Rocky Mountain Elk
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