Posts Tagged With: update

In The Field With Fishers

Our situation on the ground has been a little hectic over recent months and some of you avid followers may have been feeling a little neglected when it comes to field updates. Well, fear ye no more, I shall share a few details regarding the animals we are currently tracking on and around Stirling as of late February.

We are currently tracking 23 Fishers with active telemetry transmitters on and around the Stirling District. Of these, 16 are fitted with VHF transmitters that we must actively track. 15 of these animals are females wearing VHF collars, the other is a male born on Stirling in 2012 who was given an implanted transmitter due to his age and potential to outgrow a collar. The remaining 7 animals are males of greater than 1 year of age fitted with ARGOS collars, these collars collect locations via satellite and can be conveniently tracked from the comfort of our desks. A breakdown of these animals by year of birth/translocation can be seen in the table below.

Right now we are unable to account for 3 more animals (2 females, 1 male) with potentially active transmitters who we hope are still going about their business out there. They were all born on Stirling in 2012 and have been missing for over a month. Sometimes such animals turn up in unexpected places (see previous post “The Grass Is Always Greener”) or are recovered during our trapping efforts and sometimes we never learn their ultimate fates. Either way, they are young and wild and all we can do is to keep searching.

You can get an idea of the spread of our animals across the study area at the moment from the aerial photos below, to give a little perspective the lines on the image represent the county lines of Plumas to the East, Tehama to the west and Butte in the South.

Female locations:

Year 2 translocates in Yellow, Year 3 translocates in Blue, Juveniles from 2011 in Red, Juveniles from 2012 in Green

Year 2 translocates in Yellow, Year 3 translocates in Blue, Juveniles from 2011 in Red, Juveniles from 2012 in Green

Male locations:

Year 1 translocates in Purple, Year 2 translocates in Yellow, Year 3 translocates in Blue, Juveniles from 2011 in Red, Juveniles from 2012 in Green

Year 1 translocates in Purple, Year 2 translocates in Yellow, Year 3 translocates in Blue, Juveniles from 2011 in Red, Juveniles from 2012 in Green

As you can see we have a pretty wide spread of animals across our study area at the moment, and we are aware of uncollared individuals in many of the intervening areas. As denning season creeps up on us we will be kept busy trying to keep tabs on everyone, this year is shaping up to be an interesting one with more potential dens than any previous year, I will update you all with some of our denning predictions in the near future.

-CAB-

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