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Pinedale Online > News > December 2013 > Researchers monitor mule deer in two southwest Wyoming herds
Researchers monitor mule deer in two southwest Wyoming herds
Wyoming Range and Baggs mule deer herds
by Wyoming Game & Fish
December 23, 2013

Wildlife researchers are trapping mule deer in southwest Wyoming to learn more about migration patterns, habitat use, survival and other factors important to sustaining a healthy mule deer population.

The trapping is being conducted by personnel from the Game and Fish, Wyoming Cooperative Fish and Wildlife Research Unit at the University of Wyoming, Bureau of Land Management, U.S. Forest Service and volunteers.

Research projects continue in the Baggs and Wyoming Range mule deer herds. The Baggs mule deer herd is hunt area 82. The Wyoming Range mule deer herd is one of the largest herd units in Wyoming, and is made up of deer hunt areas 134, 135, 143, 144 and 145. The data collected from these projects will help wildlife managers better manage these deer herds.

Mule deer trapping operations in the Baggs herd began in 2011 and will continue into 2014. Mule deer are baited two weeks before trapping. Apple pulp is used as the bait and the trap is comprised of a 40-by-40 foot net suspended from poles. Biologists hide in a blind in front of the trapping site and wait for the deer to come underneath the drop net to feed on the apple pulp. When the deer are busy feeding, the release button is activated and the net falls on top of them.

Bright yellow numbered ear tags and white vinyl visual collars are placed on all deer captured to determine annual survival of deer using the Baggs underpasses via mark-resight methods. Some bucks are fitted with VHF ear tags donated by Colorado Parks and Wildlife. Now in its third year, the trapping project has yielded valuable data that will assist wildlife managers in both Wyoming and Colorado.

"We know there is interchange between the deer here in Baggs and our neighbors to the south, Colorado," said Baggs Wildlife Biologist Tony Mong. "We have been able to share data with Colorado Parks and Wildlife through the use of VHF ear tags we are placing on buck mule deer. Since buck ratios are an important parameter of our population management techniques it is very important to find out where our bucks are going so that we don’t included them in our population estimates if they are Colorado mule deer and vice versa."

Mong spends many long hours looking at the underpass trail camera footage looking for the deer with ear tags or collars. He then records the date and time the deer went through the underpass, as well as the direction they are traveling. People are encouraged to report any mule deer they see with a yellow ear tag or a white visual collar as this information is critical to collecting accurate data of where these deer migrate to and when.

Mule deer capturing operations in the Wyoming Range herd began in March 2013. Thirty-five doe deer were captured on the Labarge/Big Piney winter range complex and 35 more were captured on winter ranges between Kemmerer and Evanston. These deer were recaptured earlier this month and the data from their collars was downloaded. This research project will allow biologists to focus on where this mule deer population is now relative to current habitat conditions and find ways to help mule deer populations recover to desired levels.

Unlike the Baggs operation, a helicopter and crew of "muggers" from Native Range Capture Company located the deer and used a net gun to capture them. The deer were transported by helicopter to a processing station where biologists determine the age of the deer and measure body fat. An ultrasound was conducted to check pregnancy and fetal status and a blood and fecal sample was taken before the deer were released.

Numerous groups have partnered to make this mule deer study happen. Key contributors include the Game and Fish, the Rock Springs Chapter of Muley Fanatics Foundation, Bureau of Land Management, Wyoming Governor’s Big Game License Coalition, Animal Damage Management Board, Bowhunters of Wyoming, Sportsmen for Fish and Wildlife and the Wyoming Outfitters and Guides Association.


Pinedale Online > News > December 2013 > Researchers monitor mule deer in two southwest Wyoming herds

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