Field immobilisation of adult Weddell seals using intramuscular butorphanol and midazolam.

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Hauptverfasser: Holser, Rachel R, Hickcox, Rachel P, Costa, Daniel P, Hildebrand, Thomas, Flanagan, Sarah P, LaRue, Michelle A
Format: Artículo científico
Sprache:en
Veröffentlicht: The Veterinary record 2026
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author Holser, Rachel R
Hickcox, Rachel P
Costa, Daniel P
Hildebrand, Thomas
Flanagan, Sarah P
LaRue, Michelle A
author_facet Holser, Rachel R
Hickcox, Rachel P
Costa, Daniel P
Hildebrand, Thomas
Flanagan, Sarah P
LaRue, Michelle A
Holser, Rachel R
Hickcox, Rachel P
Costa, Daniel P
Hildebrand, Thomas
Flanagan, Sarah P
LaRue, Michelle A
collection PubMed - marine biology
contents Field immobilisation of adult Weddell seals using intramuscular butorphanol and midazolam. Holser, Rachel R Hickcox, Rachel P Costa, Daniel P Hildebrand, Thomas Flanagan, Sarah P LaRue, Michelle A When working with free-ranging phocid seals, methods of chemical immobilisation require ongoing refinement to reduce complications, particularly apnoea, during research procedures. Adult Weddell seals (n = 20) at Cape Crozier, Antarctica, were chemically immobilised with intramuscular injection of butorphanol and midazolam in 2024 and 2025. Butorphanol and midazolam were administered intramuscularly at 0.16 ± 0.03 and 0.19 ± 0.03 mg/kg, respectively. No apnoea lasting more than 2 minutes was observed, nor were any other adverse effects. The sample was limited to 20 adults, predominantly mid-lactation females (n = 14). Additional data on other demographic groups, varying the dose combination, more detailed records of seal vital signs, and additional physiological measurements (e.g., blood gases) would provide valuable insight into this drug combination for Weddell seals. In this limited study, intramuscular butorphanol and midazolam were a safe and effective combination for field immobilisation of adult Weddell seals.
format Artículo científico
id pubmed_42126025
institution PubMed
language en
publishDate 2026
publisher The Veterinary record
record_format pubmed
spellingShingle Field immobilisation of adult Weddell seals using intramuscular butorphanol and midazolam.
Holser, Rachel R
Hickcox, Rachel P
Costa, Daniel P
Hildebrand, Thomas
Flanagan, Sarah P
LaRue, Michelle A
Field immobilisation of adult Weddell seals using intramuscular butorphanol and midazolam. Holser, Rachel R Hickcox, Rachel P Costa, Daniel P Hildebrand, Thomas Flanagan, Sarah P LaRue, Michelle A When working with free-ranging phocid seals, methods of chemical immobilisation require ongoing refinement to reduce complications, particularly apnoea, during research procedures. Adult Weddell seals (n = 20) at Cape Crozier, Antarctica, were chemically immobilised with intramuscular injection of butorphanol and midazolam in 2024 and 2025. Butorphanol and midazolam were administered intramuscularly at 0.16 ± 0.03 and 0.19 ± 0.03 mg/kg, respectively. No apnoea lasting more than 2 minutes was observed, nor were any other adverse effects. The sample was limited to 20 adults, predominantly mid-lactation females (n = 14). Additional data on other demographic groups, varying the dose combination, more detailed records of seal vital signs, and additional physiological measurements (e.g., blood gases) would provide valuable insight into this drug combination for Weddell seals. In this limited study, intramuscular butorphanol and midazolam were a safe and effective combination for field immobilisation of adult Weddell seals.
title Field immobilisation of adult Weddell seals using intramuscular butorphanol and midazolam.
url https://pubmed.ncbi.nlm.nih.gov/42126025/