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Bradycardia is a medical condition in which the heart rate is slower than normal. It occurs when the heart's natural pacemaker, the sinus node, generates slower electrical impulses than the standard rhythm. In adults, bradycardia is diagnosed when the pulse rate falls below 60 beats per minute, indicating a deviation from the normal heart rate range.
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Determination of the Friction Coefficients of Icy Pavements Under Different Amounts of Snowfall
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The calm during the storm: Snowfall events decrease the movement rates of grey wolves (Canis lupus).

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  • 1Department of Biological Sciences, University of Alberta, Edmonton, AB, Canada.

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Grey wolves (Canis lupus) reduce travel speed and activity during snowfall events, suggesting precipitation impacts hunting success rather than energetics. Activity resumes within 24 hours.

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Area of Science:

  • Ecology
  • Wildlife Biology
  • Animal Behavior

Background:

  • Winter conditions, including snowfall, present unique challenges for mammalian predators.
  • Increased snow depth can affect locomotion costs and predator-prey dynamics.
  • Precipitation may impair predators' sensory abilities and pursuit effectiveness.

Purpose of the Study:

  • To investigate the behavioral responses of grey wolves (Canis lupus) to snowfall events.
  • To determine if snowfall affects wolf travel speed and activity patterns.
  • To understand the underlying mechanisms driving these behavioral changes.

Main Methods:

  • Utilized remote cameras to identify snowfall events and estimate snow depth over two winters.
  • Employed telemetry data from 17 grey wolves to analyze travel speed and activity budgets.
  • Applied mixed-effects models to assess the influence of snowfall, time of day, and time since snowfall on wolf movements.

Main Results:

  • Wolves were less likely to travel on snowfall event days compared to non-event days.
  • Wolf travel speed decreased during snowfall events, particularly when compared to speeds 24 hours prior.
  • These effects were most pronounced at night, suggesting an impact on hunting behavior, with activity levels recovering within 24 hours post-event.

Conclusions:

  • Wolf response to snowfall is likely linked to reduced hunting success due to precipitation, not increased energetic costs from snow depth.
  • Snowfall may hinder prey detection and alter prey behavior, decreasing encounter rates.
  • Further research is recommended to explore short-term weather event impacts on wildlife movement and predator-prey interactions.