Misconceptions of capture- induced hyperthermia Leith Meyer - - PDF document
Misconceptions of capture- induced hyperthermia Leith Meyer Director Centre for Veterinary Wildlife Management & Associate Professor Senior Honorary Research Fellow Department Paraclinical Sciences Brain Function Research Group -
Director Centre for Veterinary Wildlife Management & Associate Professor Department Paraclinical Sciences Pharmacology & Toxicology Faculty of Veterinary science Onderstepoort Email address: Leith.meyer@up.ac.za Senior Honorary Research Fellow Brain Function Research Group - Wildlife Conservation Physiology School of Physiology University of the Witwatersrand Braamfontein
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Heat cytotoxicity
Disrupts metabolic pathways
Energy supplies Enzymatic function
Disrupts membrane structures Increases cellular metabolism (oxygen +
Cell damage and death
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The cause of capture-induced hyperthermia
Heat stroke
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0:00 6:00 12:00 18:00 15 20 25 30 35
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Environmental conditions
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Environmental conditions
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Environmental conditions
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A
Dry bulb temperature (oC)
30 34 38 42 46 50 1 2 3
B
Black globe temperature ( oC)
Body temperature change (oC)
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Activity
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Activity
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42 40 38 4 8 12 16 20
Activity
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42 40 38 4 8 12 16 20
No drugs required for hyperthermia
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Drug effects
Etor+Azap Etor+Med Thia+Azap Thia+Med
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Drug effects
Etorphine + azaperone Etorphine + medetomidine Thiafentanil + azaperone Thiafentanil + medetomidine
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Drug effects
Etor+Azap Etor+Med Thio+Azap Thio+Med
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Stress
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Stress
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1 2 3 4
A
Body temperature change (oC)
Naïve 2 month 5 month 100 200
B
Cortisol (nmol l-1)
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The cause of hyperthermia
Heat stroke Stress (stress-induced hyperthermia)
Capture when it feels good for us
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Environmental conditions
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Environmental conditions
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26 30 34 38 42 1 2 3
A
Dry bulb temperature (oC)
30 34 38 42 46 50 1 2 3
B
Black globe temperature ( oC)
Body temperature change (oC)
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The cause of hyperthermia
Heat stroke
Capture when it feels good for us Human cooling practices should work well in
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C
t r
i c e I V m i s t 2 8 º C
1
In 1 hour
Temperature (ºC)
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The cause of hyperthermia
Heat stroke
Capture when it feels good for us Human cooling practices should work well in
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The cause of hyperthermia Heat stroke Capture when it feels good for us Human cooling practices should work well in animals
Hyperthermia is the root of all evil during capture
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D a y
/ 2 D a y
/ 2 D a y 2 D a y 1 6 D a y 3 Rectal Temperature °C
N: 38-39°C
D a y
/ 2 D a y
/ 2 D a y 2 D a y 1 6 D a y 3 Rectal Temperature °C
cooling N: 38-39°C
Nv: 0-5 mmol /L cooling N: 0-8 IU/L: cooling
N: 50-271 IU/I : cooling N ranges: Blesbok: 0,021ng/ml Dogs: 0,02 ng/ml Cats: 0,03-0,16 ng/ml Horses: 0,047 ng/ml cooling
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Maybe capture-induced hyperthermia is not the
But an indication of the evil that we have
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The cause of hyperthermia Heat stroke
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The cause of hyperthermia Heat stroke Capture when it feels good for us
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The cause of hyperthermia Heat stroke Capture when it feels good for us Human cooling practices should work well in animals
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The cause of hyperthermia Heat stroke Capture when it feels good for us Human cooling practices should work well in animals
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The cause of hyperthermia Heat stroke Capture when it feels good for us Human cooling practices should work well in animals
Hyperthermia is the root of all evil during capture
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But an indication of the evil that we have
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