Comparison of Anaesthesia and Cost of Two Immobilization Protocols in Free-Ranging Lions

Fyumagwa, Robert D.; Bugwesa, Zablon K.; Mdaki, Maulid; Mpanduji, D. G.; Kilewo, Morris; Hoare, Richard

doi:10.3957/056.042.0102

Cited by 11 publications

(5 citation statements)

References 4 publications

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“…In combination with ketamine, the intramuscular doses of detomidine are 0.05 to 0.06 mg/kg for lions (Fyumagwa et al, 2012;Kolata, 2002) and 0.15 mg/kg in cougars (Albuquerque et al, 2016). In domestic cats, the dose used ranges from 0.1 mg/kg (Emiliano and Souza, 2017) up to 0.5 mg/kg (Grove and Ramsay, 2000;Wetzel and Ramsay, 1998).…”

Section: Discussionmentioning

confidence: 99%

Can detomidine replace medetomidine for pharmacological semen collection in domestic cats?

et al. 2021

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Among the different methods used for semen collection from domestic cats, the pharmacological collection by urethral catheterization becomes disruptive. Medetomidine is the elected α 2 -adrenoceptor agonist for that, but in several countries, it is not commercially available. This study aimed to evaluate the efficacy of detomidine compared to medetomidine in collecting semen by urethral catheterization in domestic cats. Urethral catheterization was performed on 13 mongrel cats using a disposable semi-rigid tomcat urinary catheter. Of the 19 semen collections performed with medetomidine induction, 94.7% were successful, while with detomidine induction, only 56.3% of 16 were successful. The values semen samples variables were as follows for volume -10.56 ± 0.4 vs 8.88 ± 0.5 mL, motility -171.67 ± 0.79 vs 49.77 ± 3.45%, vigor -4.1 ± 0.03 vs 3.10 ± 0.1 and concentration -3.24 ± 0.19 vs 2.15 ± 0.13 ×10 9 sperm/mL respectively for medetomidine and detomidine group. The failure in semen collections with detomidine was mainly due to azoospermic samples, poor urethral relaxation, insufficient volume, or contamination of urine. The sperm concentration was also lower in the detomidine group (P <0.05) when compared to medetomidine. However, when the volume of semen collected was compared, we found no statistical differences. Despite its low performance in collecting semen from cats, detomidine may be an alternative when medetomidine is not accessible.

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Section: Discussionmentioning

confidence: 99%

Can detomidine replace medetomidine for pharmacological semen collection in domestic cats?

et al. 2021

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“…We captured 16 lions (12 female, 4 male) from 11 prides during March–November 2018 using broadcasted vocalizations 44 and rifle-fired (Palmer CapChur SS cartridge-fired rifle; Cap-Chur Equipment, Powder Springs, Georgia, USA) darts (Pneudart Type U Remote Delivery Devices; Pneudart Inc., Williamsport, PA, USA) from vehicles 45 . We equipped lions with global positioning system (GPS) collars (Model IR-SAT, African Wildlife Tracking, South Africa) programmed to obtain hourly locations.…”

Section: Methodsmentioning

confidence: 99%

Factors influencing lion movements and habitat use in the western Serengeti ecosystem, Tanzania

Schooler

Finnegan

Fowler

et al. 2022

Sci Rep

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Protected areas that restrict human activities can enhance wildlife habitat quality. Efficacy of protected areas can be improved with increased protection from illegal activities and presence of buffer protected areas that surround a core protected area. Habitat value of protected areas also can be affected by seasonal variation in anthropogenic pressures. We examined seasonal space use by African lions (Panthera leo) within a core protected area, Serengeti National Park, Tanzania, and surrounding buffer protected areas with varying protection strengths. We used lion locations in logistic regression models during wet and dry seasons to estimate probability of use in relation to protection strength, distance to protected area edge, human and livestock density, distance to roads and rivers, and land cover. Lions used strongly protected buffer areas over the core protected area and unprotected areas, and moved away from protected area boundaries toward the core protected area when buffer protected areas had less protection. Lions avoided high livestock density in the wet season and high human density in the dry season. Increased strength of protection can decrease edge effects on buffer areas and help maintain habitat quality of core protected areas for lions and other wildlife species.

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“…However, the addition of medetomidine to tiletamine–zolazepam is believed to cause hypertension ( Deem et al, 1998 ; Stegmann and Jago, 2006 ), bradycardia ( Fahlman et al, 2005 ) and arrhythmias ( Gicana et al, 2021 ). Ketamine in combination with medetomidine (combination KM) also has been used in carnivore species ( Caulkett et al, 1999 ; Stegmann and Jago, 2006 ; Fahlman et al, 2008 ; Mehmood et al, 2019 ) including lions ( Fyumagwa et al, 2012 ). However, KM seems to result in similar cardiovascular adverse effects to TZM ( Vainio and Palmu, 1989 ; Caulkett et al, 1999 ).…”

Section: Introductionmentioning

confidence: 99%

“…Monitoring blood pressure improves the outcome of anaesthesia by helping to prevent and diagnose early a wide variety of cardiovascular complications which can be caused by chemical immobilization. Immobilization of lions with TZM ( Fahlman et al, 2005 ; Jacquier et al, 2006 ) and KM ( Fyumagwa et al, 2012 ) has been described, although only briefly, with no insight into in-depth cardiovascular effects of either drug combination. Heart rate was unaffected by immobilization with these two drug combinations in lions and was the only cardiovascular variable reported.…”

Section: Introductionmentioning

confidence: 99%

Comparison of the cardiovascular effects of immobilization with three different drug combinations in free-ranging African lions

Donaldson

Meyer

Fuller

et al. 2023

Conservation Physiology

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Thirty-six free-ranging lions (12 per group) were immobilized with tiletamine–zolazepam (Zoletil 0.6 mg/kg i.m.) plus medetomidine (0.036 mg/kg i.m.) (TZM), ketamine (3.0 mg/kg i.m.) plus medetomidine (0.036 mg/kg i.m.) (KM) or ketamine (1.2 mg/kg i.m.) plus butorphanol (0.24 mg/kg i.m.) plus medetomidine (0.036 mg/kg i.m.) (KBM). During immobilization cardiovascular variables were monitored at 5-minute intervals for a period of 30 minutes. Lions immobilized with all three drug combinations were severely hypertensive. Systolic arterial pressure was higher at initial sampling in lions immobilized with KM (237.3 ± 24.8 mmHg) than in those immobilized with TZM (221.0 ± 18.1 mmHg) or KBM (226.0 ± 20.6 mmHg) and decreased to 205.8 ± 19.4, 197.7 ± 23.7 and 196.3 ± 17.7 mmHg, respectively. Heart rates were within normal ranges for healthy, awake lions and decreased throughout the immobilization regardless of drug combination used. Lions immobilized with TZM had a higher occurrence (66%) of skipped heart beats than those immobilized with KBM (25%). The three drug combinations all caused negative cardiovascular effects, which were less when KBM was used, but adverse enough to warrant further investigations to determine if these effects can be reversed or prevented when these three combinations are used to immobilize free-living lions.

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Comparison of Anaesthesia and Cost of Two Immobilization Protocols in Free-Ranging Lions

Cited by 11 publications

References 4 publications

Can detomidine replace medetomidine for pharmacological semen collection in domestic cats?

Can detomidine replace medetomidine for pharmacological semen collection in domestic cats?

Factors influencing lion movements and habitat use in the western Serengeti ecosystem, Tanzania

Comparison of the cardiovascular effects of immobilization with three different drug combinations in free-ranging African lions

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