Neck lesions in ungulates from collars incorporating satellite technology

Krausman, Paul R.; Bleich, Vernon C.; Cain, James W.; Stephenson, Thomas R.; DeYoung, Don W.; Mcgrath, Philip W.; Swift, Pamela K.; Pierce, Becky M.; Jansen, Brian D.

doi:10.2193/0091-7648(2004)032[0987:ftfnli]2.0.co;2

Cited by 34 publications

(33 citation statements)

References 5 publications

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“…We assumed that survival rates of radiocollared animals in this study were representative of the population survival rate. However, telemetry collars can cause injuries to study animals, which can influence body condition and affect behavior, reproductive success, and survival (Bleich et al 1990, Côté et al 1998, Murray and Fuller 2000, Krausman et al 2004, Bleich et al 2007. Even in the absence of injuries, there may be an increase in energetic cost associated with carrying a telemetry collar that may affect study animals (Bleich et al 2007); therefore, we cannot exclude the possibility that removal of water may have resulted in higher mortality rates in radiocollared animals than in the population at large.…”

Section: Discussionmentioning

confidence: 99%

Responses of Desert Bighorn Sheep to Removal of Water Sources

Cain

Krausman

Morgart

et al. 2008

Wildlife Monographs

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In arid regions of the southwestern United States, water is often considered a primary factor limiting distribution and productivity of desert ungulates, including desert bighorn sheep (Ovis canadensis mexicana). Thus, wildlife management agencies and sportsmen's organizations have invested substantial time and resources in the construction and maintenance of water catchments. Although the availability of freestanding water sources is believed to influence many aspects of the ecology of desert bighorn sheep, the efficacy of these water sources has been questioned and has not been examined experimentally. We used a before‐after‐control‐impact study design to determine if removal of water catchments changed diet, characteristics of foraging areas used by female desert bighorn sheep, home‐range size, movement rates, distance to catchments, adult mortality, productivity, or juvenile recruitment in 2 mountain ranges on the Cabeza Prieta National Wildlife Refuge, Arizona, USA. During pretreatment (2002–2003), we ensured that water catchments were available to desert bighorn sheep in both mountain ranges; during posttreatment (2004–2005), we drained all water catchments in the treatment range. We measured diet composition, characteristics of foraging areas, 50% and 95% kernel home ranges, movement rates, and distance to water catchments seasonally from 2002 to 2005. We also estimated adult survival, lamb:female, and yearling:female ratios from 2002 to 2005. We predicted that removal of water catchments would result in 1) increased use of foraging areas with more vegetation cover, more thermal cover, and higher succulent abundance; 2) increased consumption of cacti and other succulents; 3) an increase in home‐range size, movement rates, and distance to nearest catchment; and 4) a decrease in adult survival, productivity, and juvenile recruitment. Removal of water catchments in the treatment range did not result in predicted changes in diet, foraging area selection, home‐range size, movement rates, mortality, productivity, or recruitment. Female desert bighorn sheep did use areas with more thermal cover during the summer after removal of water catchments, but other characteristics of foraging areas used by bighorn sheep and their diet did not change appreciably with removal of water catchments. We did not document changes in home‐range area, movement rates, or distance sheep were from water during hotter months; we only documented changes in home‐range area, movement rates, and distance to water catchments during winter and autumn. There were 10 desert bighorn sheep mortalities in the treatment range and 8 in the control range; 7 mortalities in each mountain range were during pretreatment. Twelve of the 18 total mortalities occurred during summer. Survival rate was lower during pretreatment than posttreatment in both mountain ranges. We did not document increased mortality or a change in lamb:female or yearling:female ratios after removal of water catchments. Home‐range area and movement rates declined with incre...

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Section: Discussionmentioning

confidence: 99%

Responses of Desert Bighorn Sheep to Removal of Water Sources

Cain

Krausman

Morgart

et al. 2008

Wildlife Monographs

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“…Physical effects and chronic stress from wearing tags for longer periods should be considered for longer studies. We observed some neck abrasion from the AVED collars; efforts should be made to ensure good fit of neck collars and pads or inflation tubes should be considered for heavier tags (Krausman et al 2004). …”

Section: Discussionmentioning

confidence: 93%

Physiological Stress Response of Captive White‐Tailed Deer to Video Collars

et al. 2009

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Animal‐borne video and environmental data collection systems (AVEDs) are an advanced form of biotelemetry that combines video with other sensors. As a proxy for physiological stress, we assessed fecal glucocorticoid metabolite (FGM) excretion in 7 white‐tailed deer (Odocoileus virginianus) fitted with AVED dummy collars; 9 additional deer served as controls. We collected fecal samples over 3 2‐week periods: pretreatment, treatment, and posttreatment periods. There were no differences in FGMs across time periods (F2,218 = 1.94, P = 0.147) and no difference between FGMs of control and treatment individuals (F1,14 = 0.72, P = 0.411). Fecal glucocorticoid metabolite excretion in AVED‐collared deer was indistinguishable from uncollared animals and within the normal, baseline range for this species. Absence of an adrenal response to collaring suggested that AVED collaring does not induce physiological stress in deer.

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“…Despite being ,5% of the animal's body mass as indicated in general animal research guidelines (Animal Care and Use Committee 1998), our equipment was heavier than that usually used in mid-sized deer. Krausman et al (2004) reported multiple injuries on mule deer (Odocoileus hemionus) and mountain sheep (Ovis canadensis) caused by GPS radiocollars. These lesions were deemed to be a result of the collars' circular and inflexible design, increased weight, and a rigid component situated dorsally.…”

Section: Discussionmentioning

confidence: 99%

Low‐Cost Global Positioning System Harness for Pampas Deer

Zucco¹,

Mourão²

2009

J Wildl Manag

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Global Positioning System (GPS) collars have proven to be an efficient tool for studying wildlife. However, this technique generally requires great investment in material, which notwithstanding its possible cost‐effectiveness, is still beyond the means of most of the scientific community in developing countries. We developed and applied a low‐cost GPS harness system placed on pampas deer (Ozotoceros bezoarticus) in the Central Pantanal of Brazil and compared costs of our technique to other commonly manufactured GPS collar systems. Of the 19 GPS harness attached to deer, 8 failed to obtain data series. For the remaining 11 animals, we stored 31,596 locations at 5‐minute and 10‐minute fix interval schedules (<120 days of continuous monitoring). Monitoring period of each animal lasted from 4.5 days to 17.4 days. Location error tested with a stationary GPS receiver was >3.7 m for 95% of locations. Rate of fixes acquired on the programmed schedule after correcting for errors was 98.5%. Compared to the 4 most used GPS radiocollar manufacturers, cost per fix of the GPS harness we developed was >50% of the cost per fix of the cheapest available product, although our modified device was heavier than all available products for medium‐sized deer. Our approach was cost‐effective to generate reliable information about activity patterns of pampas deer and may represent an alternative technique, especially for researchers in underdeveloped countries.

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Neck lesions in ungulates from collars incorporating satellite technology

Cited by 34 publications

References 5 publications

Responses of Desert Bighorn Sheep to Removal of Water Sources

Responses of Desert Bighorn Sheep to Removal of Water Sources

Physiological Stress Response of Captive White‐Tailed Deer to Video Collars

Low‐Cost Global Positioning System Harness for Pampas Deer

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