Field Methods

We use a variety of methods to keep tabs on the fisher population.  Here we’ll present the different methods we use to track and monitor the Stirling and Klamath fisher populations (links contain more in-depth information and associated media).  We use a mix of hands-on and non-invasive techniques which allow us to keep a close eye on the health of each population.  Each method has its pros and cons, and we use them each differently at various times of the year to get the most complete picture of what the fishers are up to.

  • Remote Cameras – Cameras that capture images of fishers and other critters when we aren’t around.
  • Walk-Ins – Following fishers to where they hunt, rest, den and mate.
  • VHF Telemetry (triangulation)- Finding and estimating where fishers are by listening to a series of “beeps” from a VHF radio collar.
  • GPS and ARGOS Telemetry – The favorite tools of armchair biologists…
  • Hair Snares/Track Plates – How do you study a population without ever seeing the animals?
  • Trapping – When we need more in-depth information or need to change a telemetry unit, there’s one way to do it…
  • Physical Examination and Collaring – Getting hands-on information about body condition, reproductive status, disease, parasites, and more…
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