What have we been up to this year? Have a look at our annual report for 2019. Annual Report Wolverines 2019
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We used the wolverine population numbers we gained during our 2010-2016 southern Canadian Rockies/Columbia Mountains studies to analyze harvest sustainability and look at which landscape factors impact wolverine density (=number of wolverines in an area). Click here to get to the PDF for a low-res version of the paper, or go here to read it on the publisher’s website (it’s open access).
Range declines, habitat connectivity, and trapping have created conservation concern for wolverines throughout their range in North America. Previous researchers used population models and observed estimates of survival and reproduction to infer that current trapping rates limit population growth, except perhaps in the far north where trapping rates are lower. Assessing the sustainability of trapping requires demographic and abundance data that are expensive to acquire and are therefore usually only achievable for small populations, which makes generalization risky. We surveyed wolverines over a large area of southern British Columbia and Alberta, Canada, used spatial capture‐recapture models to estimate density, and calculated trapping kill rates using provincial fur harvest data. Wolverine density averaged 2 wolverines/1,000 km2 and was positively related to spring snow cover and negatively related to road density. Observed annual trapping mortality was >8.4%/year. This level of mortality is unlikely to be sustainable except in rare cases where movement rates are high among sub‐populations and sizable untrapped refuges exist. Our results suggest wolverine trapping is not sustainable because our study area was fragmented by human and natural barriers and few large refuges existed. We recommend future wolverine trapping mortality be reduced by ≥50% throughout southern British Columbia and Alberta to promote population recovery.
2018 has been incredibly busy getting started with a three year project, and it’s been a really successful first field season. Read our first report: 2018 Annual Report
One of our volunteers this winter has put together a very descriptive movie from his recent outing with us. Very accurate, especially the “Watch for Splatter” part!!
Sit back and enjoy:
Thanks a lot, Gord!
Not sure how I get myself into these things. We have 3 more sites to check before we wrap up the wolverine survey work for this winter. A site up Bryant Creek that’s been the haunt of a hungry lynx since January, a site up Og Meadow in Mt Assiniboine Prov Park, and one site in the Upper Spray River drainage below Palliser Pass.
Mirjam and I decided to check the Bryant and Assiniboine sites. The Bryant site we ski into. Not much trouble since it’s about a 10 km ski in. The Assiniboine site we’ve been lucky to have the support of Andre Renner who’s let us fly into the Lodge with him twice. However, this late date, there’s not any flights into the Lodge, so we’ll have to ski in and ski out – could be tricky given the deteriorating snow conditions.
I had initially thought we’d spend a couple of nights at the Bryant Cabin – ski in the 15 km to the cabin. Get up next day and ski to the Assiniboine site about 15 km away and then back to the cabin. Ski out the next day, checking the Bryant hair trap.
Mirjam had another plan. Get up early, ski to Bryant, continue up to Assiniboine Pass and to the hair trap site 3 km away, check the site, ski down the Pass to Bryant Creek and the warden cabin – an estimated 37km day.
Well, we’ve done a couple 35-40 km trips in one day this year – both times at the Spray 16 site – so what’s the big deal I thought. The more I thought about it, the easier the trip seemed, and that mix of anticipation and challenge set in.
We left Canmore at 6am and headed up towards the Smith-Dorrien road but was stopped by a locked gate just up from the Nordic Centre. A call to dispatch told us that the road was closed to wash-outs. Headed back down and around to Hwy 40 – getting a delay on our “early start” time.
We ended up at Mt Shark a little before 8am, the only car in parking lot, of course. By 8am we were skiing towards Bryant. At 1045 we’d arrived to the Bryant warden cabin – the snow was packed and skiing was fast. We opened the cabin up, got the stove fired up and began brewing tea and Top Raman noodles for an early lunch. By noon, we were back on our skis and heading towards Assiniboine Pass.
The weather turned on us, dropping in temperature and showering us with rain. By the time we arrived at Assiniboine Pass, there were low dark clouds, steady rainfall, and the occasional burst of thunder and lightening nearby.
We skied to the site, arriving around 330pm, and it definitely had all the signs of a wolverine visit. Lots of wolverine-ish looking hair on the barbs and no beaver left on the tree. We collected 17 hair samples while the rain continued to pour down on us, and finally about 430pm packed up and began the ski out of Assiniboine and back to the warden cabin.
We arrived at 700pm, soaked to the bone. In no time the cabin looked like a Chinese laundry. Pasta al pesto, some great cheese Mirjam brought (and fried), done dishes and a good night’s sleep.
Next morning, nearly clear skies, beautiful day and fast ski out. Fresh grizzly bear tracks over our ski tracks coming in. We hooted and hollered as we ski down and out along Bryant Cr. At the Bryant site, not any wolverine-ish looking hairs, but just a lot of light-coloured lynx type hairs. The cameras will tell…
Source: Marathon | Highway Wilding Blog
April is here. We’re close to finishing the season for wolverine work. It’s been great to continue another winter of the noninvasive survey “trapping hairs” of wolverines, keeping our backs strong, our legs firm and clothes smelling of Gusto. This year we set out relatively few (10 sites), split between the TCH corridor and a “transition area” between our large study grid and one in Kananaskis Country. This winter the full KCtry grid is being surveyed. Next winter (2012-13) we will repeat our survey over 6000km2 in Banff, Yoho and Kootenay NP, as we did in winter 2010-11.
One of our transition sites is in the Spray River drainage. I skied into the site yesterday (Monday Apr 9) to check it for the last time and take it down. No beaver or smelly lure to carry in, so a much lighter load than before. Skiing this time of year can be tricky given the warm temperatures during mid and latter part of day, slowing one down to a laborious trudge, snow sticking to skis, and the constant pole whack on the skis. For that reason I left early, was skiing by 730am.
Start at Goat Creek trailhead and bombed down the icy trail to the Spray River junction. Record time, slightly less than 1 hr – and didn’t fall once! From the junction, our site is about 10km up the Spray drainage. Beautiful morning ski. Don Gorrie snowmobiled in day before to bring out the beaver barrel located near the hair trap site, so having a packed trail made skiing fast. I was following 2-3 day old wolverine tracks down the trail, heading the same direction I was. They went for 3-4 kilometres and most of the time were two tracks, interweaving, one on one side, one on the other, occasionally same side. By 1115am I was at the site. Took down the camera. Collected 10 hair samples (some looking wolverine-ish). Pulled down the barbed wire. Decided to ski back out since the conditions were so fast, rest of day was supposed to stay cool (+7 C) and wouldn’t likely run into sloppy crust-breaking snow. On the return, I found 2 scats along the wolverine tracks (missed them on the way in) and collected them (like hairs) for genetic analysis to confirm species, individual and gender identification. Spring like conditions on the way out. No one seen on the trail anywhere. Arrived at Goat Creek parking lot at 5pm (quitting time!).
Source: Daytrip | Highway Wilding Blog
Winter is a busy time for us. This is when a large part of our field research takes place. Here the long winters and abundant snow provides advantages to other seasons. Hungry bears are asleep, that might otherwise wreak havoc on beaver baits set out at wolverine hair traps. Snow cover reveals – magically – the movements (and behaviours!) of wildlife in the highway corridor and around culverts, which is impossible to decipher in the dry months.
Wolverines ? – Next year is another big year for us. But this winter we’re collaborating with wolverine surveys in Kananaskis Country by setting hair traps and collecting data on wolverines in a boundary region between our national park study area and theirs to the east. We’ve put out 3 hair traps so far and will set two more this month. Within our study area we’ve set a half dozen wolverine hair traps within the TCH corridor, to try and collect more information on where wolverines are crossing the highway (if at all!) and hitting some spots where we struck out last winter. In total we’ll be managing about a dozen hair traps this winter. Mirjam Barrueto is helping with this work, as is Ben Dorsey from time to time. Nikki Heim who assisted on the wolverine survey last year is running the KCtry survey as part of her Masters project at U Vic.
Much of what comes up on this blog will probably be from our wolverine work. Not that weasels and meadow voles’ running through culverts isn’t sexy, but it’s hard to compete with ‘le carcajou’. A short glossary of terms is in order that will help understand some of the jargon we use as part of the research.
Gulo Glossary (not alphabetical)
Gulo = wolverine…Gulo is the genus of the species Gulo gulo (doubly “Gulo”!).
Gusto = extremely pungent, foul-smelling trappers lure (irresistible to Gulos) that we smear on a small rag and hang high to bring wolverines into the area of a hair trap. Some people really like the smell, and the more you’re around it the more you’re convinced it has a hint of anise, along with skunk scent glands and who knows what else.
Beaver bits = while setting a hair trap, bits of frozen beaver carcass that comes raining down on you as you hold the beaver carcass 2 m high up against a tree and your “partner” hammers vigorously, spiking the carcass to the tree.
Beaver jacket = appropriate attire (usually picked up for cheap at Value Village) used to shield you from the shower of beaver bits….
Buggers = coined by Barb Bertch…these are baits (beavers) that are frozen into a misshaped mass of …beaver…and don’t lie flush against the hanging tree.
Wolveriners (pronounced: wol – ve – reeners) = that’s us! And anyone that joins us.
Wolverining = that’s where we go when we set up a hair trap.
Wolverine party truck = our smelly work vehicle.
Prayer flag = Gusto-smeared rag hung high from a tree near the hair trap site.
More vocabulary to come…
Hope you like the website…
Don’t forget to check out videos that award-winning filmmaker Leanne Allison has created.
Also our Wolverine Watch.org website where you can record with an online mapping tool observations of wolverines or their tracks you come across.
We’ll also be posting photos from our ‘camera traps’ that take you from the comfort of your internet connection to backcountry ski trails and snowladen glades full of wolverine tracks and wanderings.
We’ll try to keep this dynamic and full of surprises…
November 16 was a momentous day for the Highway Wilding project. Dr. Tony Clevenger and his intrepid team of researchers documented the inaugural use of a wildlife overpass in Banff National Park by a wolverine! And, here is the proof:
Dr. Tony Clevenger will be speaking on Calgary’s CBC Radio program “The Eyeopener” at approximately 7:20am on Tuesday, December 13. Be sure to tune in to learn about the first use of a wildlife overpass by a wolverine and the importance of highway crossing structures for wolverine and other animals.