Capture of Sandhill Cranes Using Alpha-chloralose: A 10-Year Follow-up

Hartup, Barry K.; Schneider, Lauren K.; Engels, J. Michael; Hayes, Matthew A.; Barzen, Jeb A.

doi:10.7589/2013-06-140

Cited by 13 publications

(12 citation statements)

References 3 publications

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“…We captured adult territorial pairs or family groups during the fall using alpha-chloralose (Bishop 1991) placed on corn after pre-baiting had successfully conditioned target birds to eat predictably (Hayes et al 2003;Hartup et al 2014). We banded captured birds with unique band combinations that could be identified in the field with a spotting scope (Dickerson and Hayes 2014).…”

Section: Banding Birdsmentioning

confidence: 99%

Effects of territorial status and life history on Sandhill Crane (Antigone canadensis) population dynamics in south-central Wisconsin, USA

et al. 2019

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Population growth rate in long-lived bird species is often most sensitive to changes in adult survival. Sandhill Cranes (Antigone canadensis (Linnaeus, 1758)) have long life spans, small broods, and delayed first reproduction. Only territorial adult Sandhill Cranes participate in breeding, and territory acquisition reflects the interplay between the availability of suitable territories and the variation in mortality of adult birds occupying those territories. We estimated vital rates of a population at equilibrium using long-term resightings data (2000–2014; n = 451 marked individuals) in a multistate mark–resight model and used a stage-structured projection matrix to assess how strongly territorial adult survival affects population growth rate. Elasticity analysis indicated territorial birds surviving and retaining territories had a 2.58 times greater impact on population growth compared with the next most important transition rate (survival of nonterritorial adults remaining nonterritorial). Knowing how changes in vital rates of various stage classes will differentially impact population growth rate allows for targeted management actions including encouraging growth in recovering populations, assessing opportunity for recreational harvest, or maintaining populations at a desired level. This study also highlights the value of collecting demographic data for all population segments, from which one can derive reproductive output or growth rate.

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Section: Banding Birdsmentioning

confidence: 99%

Effects of territorial status and life history on Sandhill Crane (Antigone canadensis) population dynamics in south-central Wisconsin, USA

et al. 2019

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“…Alpha-chloralose makes birds less aware of their surroundings and generally less alert or even puts them to sleep for 1 to 24 hours, after which they awaken and freely leave the capture area (Hayes et al, 2003). This capture method, suggested as effective in alleviating stress and lowering stress-related morbidity (Hartup et al, 2014), is applied through ingestion and thus might affect gut microbial composition. Birds defecated only shortly prior to recovery from sedation; thus, large differences in recovery time (39-1278 min) and possible difference in stress and residual sedative levels, may explain the larger differences in microbiota composition in the trapped group (weighted UniFrac dispersion) compared to the non-invasively sampled birds.…”

Section: Discussionmentioning

confidence: 99%

Noninvasive sampling for comparisons of wildlife microbiomes may be more reliable than sampling trapped animals

Turjeman

Pekarsky

Corl

et al. 2022

Preprint

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In ecological and conservation studies, responsible researchers strive to obtain rich data while minimizing disturbance to wildlife and ecosystems. We assessed if samples collected noninvasively can be used for microbiome research, comparing microbiota of noninvasively collected fecal samples to those collected from trapped common cranes at the same sites over the same periods. We found significant differences in microbial composition (alpha and beta diversity), which were not accounted for by noninvasive samples' exposure to soil contaminants, as manually assessed by comparing differentially abundant taxa. They could result from trapped birds' exposure to sedatives. We conclude that if all samples are collected in the same manner, comparative analyses are valid, and noninvasive sampling may better represent host microbiota because there are no trapping effects. Experiments with fresh and delayed sample collection can elucidate effects of environmental exposures on microbiota. Further, stressing or sedation may unravel how trapping affects wildlife microbiota.

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“…There were no welfare issues with other individuals, which we released within recommended time for physical restraint (Hartup 2006). Alpha-chloralose has been used on sandhill cranes (Grus canadensis) to reduce the risk of capture myopathy, in preference to physical restraint methods (Hayes et al 2003;Hartup et al 2014). This was not an option for us due to: 1) inability to house brolgas until sedative wears off; 2) difficulty in controlling dosage; 3) increased risk of predation or collision with fences and power lines; 4) potential impact on non-target species and livestock; 5) availability of veterinary personnel.…”

Section: Welfare Considerations and Recommendationsmentioning

confidence: 99%

“…Studies show that the effectiveness and welfare risks of methods vary with species, life history stage, group size and geographic location and this is important to consider when trapping cranes in novel circumstances. Welfare issues are considered in some studies (Ellis et al 2001;Hayes et al 2003;Folk et al 2005;Businga et al 2007;Parker et al 2008;Hartup et al 2014), although not all report injuries and mortalities associated with capture methods Hereford et al 2001;Alonso et al 2008). Cranes can be injured Brolga capture and tagging methods 5 by trap parts (such as poles, rocket net projectiles or net edge, nooses) (Ramakka 1979;Parker et al 2008) or suffer capture related stress due to physical restraint (Hayes et al 2003).…”

Section: Introductionmentioning

confidence: 99%

“…This is best avoided by following capture and handling protocols that minimise stress (Hartup 2006;Businga et al 2007). Use of alpha-chloralose has been shown to reduce the risk of capture myopathy (Hayes et al 2003;Hartup et al 2014). Although this method eliminates the need for physical restraint it requires the presence of a vet and housing of cranes for 12-24 hours until effects of the drug wear off (Hayes et al 2003).…”

Section: Introductionmentioning

confidence: 99%

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Assessing capture and tagging methods for brolgas, Antigone rubicunda (Gruidae)

Veltheim

Chávez-Ramírez²,

Hill³

et al. 2015

Wildl. Res.

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Context Studies assessing welfare issues and efficiency of animal capture methods are important, as capture can pose a significant welfare risk and methods can be time consuming to develop. It is imperative to choose methods that minimise injuries, maximise capture rates and minimise time spent on capture. Aims To test methods of crane capture and tagging (transmitter, colour and metal band fitting), and to compare and develop safe and time efficient methods for capturing brolgas (Antigone rubicunda). Methods We tested three types of noose traps, cannon nets, clap-nets, spotlighting at night roosts and active pursuit of pre-fledged chicks. We also tested two band sizes and two transmitter attachment methods. We compared the success and capture efficiency of these methods and considered welfare issues by comparing the number of injuries and mortalities resulting from these methods. Key results We successfully captured brolgas with noose traps and a cannon net, and by using active pursuit of pre-fledged chicks. Noose traps became more efficient when deployed with call playback and taxidermy decoys. Australian noose traps and active pursuit of pre-fledged chicks were the safest methods with fewest injuries. Conclusions For maximum capture success with minimum injuries to target and non-target species, we recommend noose traps with call playback and taxidermy decoys for capturing adult and juvenile brolgas at feeding areas, and active pursuit for pre-fledged chicks at breeding sites. Noose lines should have elastic at both pegged ends, to avoid injuries. To minimise injuries from tagging, we recommend leg-band-fitted transmitters in preference to harness-fitted transmitters, Australian size 35 bands and colour bands with an internal diameter of 22 mm. Implications The use of Australian noose traps with call playback and taxidermy decoys is a safe and time efficient method for capturing brolgas, and is also likely to work for other crane species. Our recommendations can help reduce capture-related mortalities and injuries to brolgas (and potentially other cranes), which is crucial, given the brolga is a threatened species.

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Capture of Sandhill Cranes Using Alpha-chloralose: A 10-Year Follow-up

Cited by 13 publications

References 3 publications

Effects of territorial status and life history on Sandhill Crane (Antigone canadensis) population dynamics in south-central Wisconsin, USA

Effects of territorial status and life history on Sandhill Crane (Antigone canadensis) population dynamics in south-central Wisconsin, USA

Noninvasive sampling for comparisons of wildlife microbiomes may be more reliable than sampling trapped animals

Assessing capture and tagging methods for brolgas, Antigone rubicunda (Gruidae)

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