Colorado wildlife managers stock Colorado River with trout resistant to whirling disease

By Colorado Parks and Wildlife
Real AspenOctober 11, 2012
GLENWOOD SPRINGS — Colorado Parks and Wildlife is stocking several thousand large, whirling disease resistant Hofer rainbow trout into a section of the Colorado River where a large, natural fish kill occurred earlier this year.

Wildlife managers began stocking operations on Tuesday, between Dotsero and the Cottonwood boat ramp.

After a heavy, monsoonal downpour last July, a large amount of silt and debris was washed into the Colorado River below Dotsero and through the Glenwood Canyon, eventually killing several thousand fish in this section.

"We have received recent reports from anglers that fishing has been unproductive and trout seem to have declined since the fish kill," said Aquatic Biologist Kendall Bakich. "Stocking these Hofer rainbows will not only replenish the population; it will establish a whirling disease resistant fish that anglers can enjoy into the future."
A Hofer rainbow trout.
Colorado Parks and Wildlife


Whirling disease, a serious physical condition in some species of trout and salmon is caused by a parasite found in the water. Severely infected young trout often develop deformities of the skull and spinal column. In some areas of Colorado, most of the young wild rainbow trout die 3 - 6 months after infection.

"The fish kill in July was unfortunate, but it has provided an opportunity to stock this disease resistant strain of rainbow trout," said Perry Will, Area Wildlife Manager in Glenwood Springs. "Anglers fishing in this section of the Colorado River will certainly benefit from this effort."

Hofer rainbow trout originated from the Kamloops rainbow trout found in the Columbia River system. In the late 1800s, these fish were transported to Germany where they were grown as food fish in local hatcheries. Because whirling disease is common in Germany, the fish were reared in whirling disease-positive waters. Over time, this strain developed a resistance to the parasite.

Colorado Parks and Wildlife was created by the merger of Colorado State Parks and the Colorado Division of Wildlife, two nationally recognized leaders in conservation, outdoor recreation and wildlife management. Colorado Parks and Wildlife manages 42 state parks, all of Colorado's wildlife, more than 300 state wildlife areas and a host of recreational programs.


comments: 0 Comments on "Colorado wildlife managers stock Colorado River with trout resistant to whirling disease"

Be the first to comment below.

COMMENT
Comment Form Info  Comment Information
Real Aspen encourages you to post comments on our articles and blogs. Logged in email is required for monitoring purposes. Your email will not be published and will not be distributed to any third-party. Abusive, obscene, profane, threatening, libelous or defamatory comments are prohibited. By posting a comment, you agree to this policy and our terms of use. To report an abusive posting, please contact us.

To make a comment, please log in or create an account. This helps us prevent spam and other malicious attacks.

Please log in to comment

 

Create a user account to comment

Snow Report

  24hr snow mid dpth snow cond.
A-Basin n/a n/a
Aspen n/a n/a closed
BC n/a n/a closed
Breckenridge n/a n/a closed
Buttermilk n/a n/a closed
Copper n/a n/a closed
Crest. Butte n/a n/a closed
Eldora n/a n/a closed
Heavenly n/a n/a closed
Highlands n/a n/a
Howelsen n/a n/a closed
Keystone n/a n/a closed
Kirkwood n/a n/a closed
Loveland n/a n/a
Monarch n/a n/a closed
Northstar n/a n/a closed
Powderhorn n/a n/a closed
Purgatory n/a n/a closed
Silverton n/a n/a closed
Ski Cooper n/a n/a closed
Ski Granby n/a n/a closed
Snowmass n/a n/a closed
Steamboat n/a n/a closed
Sunlight n/a n/a closed
Telluride n/a n/a closed
Vail n/a n/a closed
WinterPark n/a n/a closed
Wolf Creek n/a n/a closed
More Weather Reports
VIDEO GALLERY
A teaser to the Winter X Games in Aspen
Methane from Bill Koch's coal mine powers Aspen Skiing Company
'Circle of Corduroy'