THIAFENTANIL–AZAPERONE–XYLAZINE AND CARFENTANIL–XYLAZINE IMMOBILIZATIONS OF FREE-RANGING CARIBOU (<i>RANGIFER TARANDUS GRANTI</i>) IN ALASKA, USA

Lian, Marianne; Beckmen, Kimberlee B.; Bentzen, Torsten W.; Demma, Dominic J.; Arnemo, Jon M.

doi:10.7589/2015-04-101

Cited by 17 publications

(20 citation statements)

References 11 publications

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“…For example, Kock et al () documented significant differences in a meta‐analysis of capture‐based mortalities and physiological, biochemical, and hematological parameters among bighorn sheep ( Ovis canadensis ) captured by various modes, including drop‐net, drive‐net, chemical immobilization, and net‐gun. For remote populations of northern ungulates, however, helicopter‐based captures is likely the only viable capture method (Lian et al , Harms et al ). A final limitation of our study was that our results may be specific to the drug combination we used.…”

Section: Discussionmentioning

confidence: 99%

“…Helicopters are often used to efficiently capture free‐ranging ungulates (Lian et al , Harms et al ); yet, helicopter overflights may significantly disturb individuals (Frid , Côté et al ). As such, helicopter‐based captures may be expected to cause overt responses in captured individuals because of the stress of being pursued by a helicopter.…”

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confidence: 99%

“…Despite the benefits of data obtained via capture and handling, investigating the potential negative effects of these events is important to understand costs to individuals or populations (Cattet et al , Rode et al ). Several studies involving large mammals have characterized effects of capture and handling on their physiological parameters (Kock et al , Lian et al ) or survival (Berger and Kock 1987, Côté et al , Rode et al ). Most of these studies have found little to no long‐term effects; although bears ( Ursus spp.)…”

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confidence: 99%

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Short‐term effect of helicopter‐based capture on movements of a social ungulate

et al. 2019

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Capture and handling of wildlife is often an important component of studies where detailed demographic, behavioral, physiological, or health data are required. Yet, capturing and handling wildlife is sometimes controversial and lacking public support because of concern about effects on individuals. Investigating potential effects of capturing wildlife is also important to inform data-censoring protocols when using information obtained from captured animals. We investigated the short-term effect of helicopter-based capture and handling on movements of free-ranging bison (Bison bison) that were chemically immobilized in Yukon, Canada. We examined daily movement rates, home range size, and displacement of global positioning system-collared individuals immediately after capture and for 20 days thereafter. Our results indicate that there is a minimal short-term effect of helicopter-based capture on bison movements. Significant differences from apparent pre-capture movement behavior were observed only within 24 hours after capture. We observed variation among individuals, however, with some animals taking up to 10 days to return to apparent pre-capture movement rates, whereas others had no measurable response to capture. Despite individual variation, >80% of individuals had returned to apparent pre-capture movement behavior within the first 5 days after capture. Furthermore, sex-based effects were evident: females increased their daily movement rates, home range size, and displacement after capture, whereas males had either no effect or decreased movement rates. Our results suggest that movement rates are altered for only a short period after capture and, therefore, should not have severe negative effects on bison using our protocols. Accordingly, researchers should censor the first 10 days after capture from their analyses to avoid using biased information. Our study should also help inform public discourse regarding capturing and handling wildlife for research or management purposes. Ó

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Section: Discussionmentioning

confidence: 99%

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confidence: 99%

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Short‐term effect of helicopter‐based capture on movements of a social ungulate

et al. 2019

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“…Many of these animal welfare risks can be mitigated using highly potent and fast-acting pharmacological agents. Thiafentanil (often used in combinations) has become an increasingly popular sedative for remote chemical immobilisation of wildlife [31,32,[50][51][52][53]. The IT recorded with the use of thiafentanil (mean of 3 min) were short when compared to deer helicopter darting methods using non-opioid pharmacological regimens.…”

Section: Helicopter Dartingmentioning

confidence: 99%

Efficacy and Animal Welfare Impacts of Novel Capture Methods for Two Species of Invasive Wild Mammals in New Zealand

Davidson¹,

Warburton

Yockney

et al. 2019

Animals

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All capture methods impose animal welfare impacts, but these impacts are rarely quantified or reported. We present data from two wildlife capture studies that trialled new methods for capturing Bennett’s wallabies (Notamacropus rufogriseus) and red deer (Cervus elaphus) in New Zealand. We used helicopter net-gunning for both species, and compared this method with ground-based netting for wallabies and helicopter darting for red deer, using, for the first time in New Zealand, the fast-acting opioid thiafentanil. Efficacy and animal welfare parameters quantified were duration of handling and recovery, and frequency of adverse events, including escape, injury, and mortality. Cost-effectiveness was quantified for each method. Capture mortalities occurred for all methods for both species. For red deer, chemical immobilisation led to fewer traumatic injuries and fewer mortalities, while for wallabies, net-gunning led to fewer mortalities. Net-gunning was an efficient capture method for deer in open habitat, but led to the escape of 54% of wallabies and one wallaby mortality (4%). Ground-based netting resulted in the mortality of 17% of wallabies at the time of capture, and the capture of non-target species. The cost per captured wallaby was 40% more expensive for net-gunning (NZ$1045) than for ground-based netting (NZ$745), but, once corrected for mortalities at the time of capture and suitability of individuals for GPS-collar deployment, this was reduced to 29% and 12% more expensive, respectively. Net-gunning for red deer resulted in the escape of 13% of animals and mortality of 10% of animals at the time of capture. Helicopter-based darting for red deer using thiafentanil (c. 0.03–0.06 mg/kg) had high capture efficacy (zero escapes), rapid induction times (mean of 3 min), and a low mortality rate at 14 days post-capture (3%), but it was more expensive per deer captured and collared than aerial netting (NZ$2677 and NZ$2234, respectively). We recommend reporting of adverse event data for all wildlife capture techniques to permit continual refinement of field methods.

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“…Using a staggered entry design (Pollock et al 1989), we captured and GPS-collared 153 adult caribou and 24 adult bison. Caribou were captured during collaring sessions between November 2014 and April 2016, using a helicopter to deliver either a net (Barrett et al 1982) or dart containing a chemical immobilant (Lian et al 2016). GPS-collared caribou were distributed among eight populations (Fig.…”

Section: Field Trials On Ungulatesmentioning

confidence: 99%