Deer, elk birth rates in Aspen area concern wildlife officers |

Deer, elk birth rates in Aspen area concern wildlife officers

Herds of elk are often seen along Owl Creek Road outside of Snowmass Village in the fall. While the population has been maintained, it's not 'healthy,' according to a wlidlife officer.
Christina Capasso/Special to The Aspen Times |


Deer and elk antler collectors will have to exercise patience starting next year.

The Colorado Parks and Wildlife Commission approved new rules last month that restrict when shed antlers can be collected starting in the 2015 big game season. Hunters will be restricted from collecting until March 1, according to Perry Will, area wildlife manager for area 8, which includes the Roaring Fork Valley. There currently are no restrictions.

“That shed (antler) hunting is getting really big,” Will said. Some collect for their personal stashes while others use antlers for commercial purposes.

Collectors will scope out a big bull for days at a time waiting for them to shed their antlers, he said. It often requires multiple days because they shed antlers at different times.

Kevin Wright, district wildlife manager for the Aspen area, said some collectors seek the antlers from the same bulls year after year, showing the progression of the size of the antlers as the animal ages. The collectors sometimes get aggressive, Wright said. He’s heard of cases where they will chase animals to get them to drop their antlers.

The aggressive hunting has created issues in the Roaring Fork and Eagle valleys. Deer and elk herds are getting harassed in the winter ranges where they congregate, Will said. Those ranges are usually islands that are critical for the survival of the animals.

The commission approved the proposal to prohibit collection until March 1 and after 10 a.m. because it helps “minimize disturbance of animals on their winter range,” according to the packet for their January meeting. Time limits were already in place in the Gunnison area, Will said.

Deer and elk caught a break this winter and they need it, according to officers with Colorado Parks and Wildlife.

The warm weather, lack of snowfall and disappearing snowpack at lower and mid-level elevations have made it easier for deer and elk to find food, said Kevin Wright, district wildlife manager for the Aspen area.

The animals also are more dispersed than normal, so they are less susceptible to disease and disturbance from humans and their dogs, he said.

But Colorado Parks and Wildlife officials remain concerned about the low fawn-to-doe ratios in deer and calf-to-cow ratios in elk in the Aspen and Glenwood Springs area. Wright and other wildlife officers working in the Roaring Fork Valley performed their annual aerial survey in late December and early January. They fly by helicopter over winter ranges to take representative samples of the ungulates.

They found a ratio of 32 calves per 100 cows in Game Management Unit 43, which covers the south side of Highway 82 from Glenwood Springs to Castle Creek Valley south of Aspen and the Crystal Valley.

The ratio was 35 calves per 100 cows in Game Management Unit 47 on the north side of the Roaring Fork Valley and up to Independence Pass.

The ratios have stalled in the low and middle 30s for at least 10 years, Wright said.

“To me, that’s an indication that something’s wrong,” he said. The factors could include disturbance of deer and elk by people and their dogs during tough winter months when the animals need to reserve their energy to survive, according to Wright. The habitat also is shrinking due to development and winter-range forage is often decadent and in poor condition because of lack of fire in the ecosystem.

The birth rates are enough to maintain the elk herd, but it’s not a “healthy number,” Wright said. Colorado Parks and Wildlife wants to see ratios for elk between 48 and 52 calves per 100 cows, he said.

Colorado wildlife officials have been concerned for years over the plummeting deer herd populations. Disease, habitat issues and tough winters have decreased deer populations in Colorado. Deer typically cannot survive winters as well as elk.

The snowpacked winter of 2007-08 “hit us hard,” Wright said.

This winter — where the weather turned mild after a cold and snowy start — could give the numbers at least a temporary boost, according to Perry Will, area wildlife manager for Area 8, which includes Aspen. His rule of thumb is if there is “brown ground” at Christmas, deer generally do well. He noted that there was deep snow during the holidays, so he was getting concerned. That concern dried up in January along with the weather.

Wright said the aerial survey showed a ratio of 48 fawns per 100 does on the south side of the Roaring Fork basin and 53 on the north side. Wildlife officials would like to see ratios in the 70s per 100 does, he said.

Colorado Parks and Wildlife creates models of deer and elk populations in March based on the observed numbers in the field. The models consider factors such as mortality rates to estimate populations and trends. Those are used to determine how many hunting tags will be issued.

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