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- Arnemo, Jon, et al.
(författare)
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Effective thiafentanil immobilization and physiological responses of free-ranging moose (Alces alces) in northern Sweden
- 2018
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Ingår i: Veterinary Anaesthesia and Analgesia. - : Elsevier BV. - 1467-2987 .- 1467-2995. ; 45, s. 502-509
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Tidskriftsartikel (refereegranskat)abstract
- Objective To evaluate clinical and physiological responses in moose to thiafentanil administration for immobilization.Study design Cross-sectional clinical study.Animals Eleven (six males and five females) free-ranging adult moose (Alces alces).Methods Each moose was darted from a helicopter with 7.5 mg thiafentanil during March 2014 in northern Sweden. Physiological evaluation included vital signs and blood gases. Arterial blood was collected after induction and again after 10 minutes of intranasal oxygen administration and analyzed immediately with an i-STAT analyzer. A total of 10 mg naltrexone per milligram of thiafentanil was administered to all animals for reversal. Data were analyzed using descriptive statistics.Results All moose were sufficiently immobilized with a single dart injection. Induction occurred within 3 minutes in 10 of 11 moose. One individual became recumbent while crossing a river and naltrexone was immediately administered. Animals maintained sternal recumbency with their head raised and vital signs were stable. Nine of 10 moose were hypoxemic before oxygen administration, with seven becoming markedly hypoxemic [partial pressure of arterial oxygen (PaO2) between 40 and 59 mmHg (5.3-7.9 kPa)]. The PaO2 increased significantly between samples, but six moose remained hypoxemic despite therapy. Hypercapnia was seen in all moose, with eight having marked hypercapnia [partial pressure of arterial carbon dioxide (PaCO2) > 60 mmHg (> 8.0 kPa)]. All moose were acidemic, with nine showing marked acidemia (pH < 7.20). The pH increased significantly with time and lactate decreased. Recoveries were rapid and uneventful, and all moose were living 6 months after capture.Conclusions Thiafentanil provided rapid and sufficient immobilization of moose and its effects were rapidly reversed with naltrexone. As with other opioids, moose showed hypoxemia and varying degrees of respiratory and metabolic acidosis. Arterial oxygenation of moose improved following intranasal oxygen, but hypoxemia was not fully resolved despite therapy.
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- Ericsson, Göran, et al.
(författare)
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Offset between GPS collar-recorded temperature in moose and ambient weather station data
- 2015
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Ingår i: European Journal of Wildlife Research. - : Springer Science and Business Media LLC. - 1612-4642 .- 1439-0574. ; 61, s. 919-922
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Tidskriftsartikel (refereegranskat)abstract
- GPS collar-recorded temperature is often considered as a proxy for the ambient temperature in wildlife ecology studies, yet few studies actually test its reliability as well as the correlation with ambient temperature. Here, we address this question and demonstrate a strong correlation between collar temperature and weather station data, indicating that GPS collar sensor data can be regarded as a reliable index of ambient air temperature. Using data obtained from 384 free-ranging moose equipped with GPS collars between latitude 57A degrees N to 68A degrees N in Sweden, we analyzed 1,467,361 paired observations of collar temperature and air temperature of the nearest official Swedish Meteorological and Hydrological Institute station. We found a systematic offset that varied across months, being larger during the warm summer months than during the winter period. We found an average correlation of .91 (r (s); range .75 to .93, median .91) between collar and ambient temperature of the nearest weather station. Thus, temperature sensors in, e.g., a GPS collar, may be used to study animal behavior, movement and habitat choice in relation to ambient air temperature. This aligns with the calls for using animals as not only subjects but also as the samplers of the environment. It also opens up possibilities for large-scale projects on animal ecology and physiology in the absence of ground measuring stations on higher spatial scales like home range and landscape. As an application of collar temperature, we show that changes in the movement patterns seem to be highly influenced by temperature-induced heat stress that moose experience during summer.
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