Conservation News


Potential California Fishing Closures Due to the Drought
From the IFFF - International Federation of Fly Fishers

In response to continued extreme drought conditions, the Fish and Game Commission has established a quick response process to temporarily close fisheries experiencing degraded environmental conditions that may affect fish populations or their habitat. The criteria are intended to ensure that fisheries are protected under critical conditions stemming from the drought. These criteria will be monitored in statewide inland fisheries, and they will be evaluated on a water by water basis over time as conditions change.
The Department of Fish and Wildlife will maintain a list of closed waters and update that list on Wednesday of each week by 1:00 pm. In the event that water conditions change later in the week, the fishing status for each specific water will not change until the day following the next Wednesday. It will be the responsibility of the angler to use the telephone number below or go to the department's website at https://www.wildlife.ca.gov/Regulations to obtain the current status of any water. The number to call for information is (916) 445-7600.
So call before you go fishing to ensure the water you wish to fish is open. If your trip extends over a Wednesday, call again to be sure its status has not changed.

Lowell Ashbaugh - NCC Conservation VP
NCCFFF
2814 I Street, Sacramento, CA 95816


Whirling Disease Detection Triggers Quarantine at Two California Trout Hatcheries-June 4, 2015

The detection of a disease-causing parasite has led the California Department of Fish and Wildlife (CDFW) to quarantine infected trout at two northern California hatcheries. During routine hatchery and fish health checks, CDFW fisheries pathologists found that captive-raised fish at the Darrah Springs Trout Hatchery (located in the Battle Creek watershed east of Redding) tested positive for whirling disease. Prior to the discovery, trout were transferred from an infected raceway at Darrah Springs to Mt. Shasta Hatchery. While fish transferred to Mt. Shasta Hatchery from Darrah Springs Hatchery tested positive for the parasite, it is yet unknown if biological and environmental conditions allowed it to complete its lifecycle at that location. Approximately three million rainbow and brown trout at both hatcheries are now under quarantine and will undergo testing.
Whirling disease is caused by Myxobolus cerebralis, a protozoan parasite that destroys cartilage in the vertebral column of trout and salmon. It can be fatal to infected trout and salmon but does not affect humans or other wildlife or fish. Trout and salmon that test positive for the disease are still safe for human consumption. Although the infected hatchery fish cannot be released into California's waterways, they can and will be euthanized in a manner that allows for usage as food fish. CDFW is currently working with local food banks to arrange donation, and a previously scheduled children's fishing event at the Mt. Shasta Hatchery this weekend will be held as planned.
The whirling disease parasite is naturally present in some streams and rivers in California. Hatchery outbreaks are unusual but not unheard of (there have been none in northern California for two decades). The disposal of infected hatchery-raised trout is a necessary precaution to prevent the spread of disease to non-infected state waters where the fish would normally be planted.
"This is a bitter pill to swallow," said Stafford Lehr, CDFW Fisheries Branch Chief. "We have raised and nurtured these trout to provide fishing opportunity. It's heartbreaking. We are committed to take whatever steps necessary to eradicate this disease and bring these hatcheries back online."
The parasite is believed to have entered Darrah Springs Hatchery via the water source supplying a portion of that hatchery. Some species of fish-eating birds can transmit the parasite and river otters can carry it on their fur from one water to another. The possibility that the parasite was transferred to the hatchery from local nearby waters known to have whirling disease is likely, due to current drought conditions that cause wildlife to move to available water sources.
Until testing is complete the exact number of fish exposed to and infected with the disease is unknown. Once the infected fish are euthanized, the latest scientific techniques will be used to cleanse the impacted areas of the hatcheries, confirm the impacted water sources are whirling disease-free and bring the facilities back to production status as soon as possible.
CDFW pathologists routinely inspect each of the 13 state-run trout hatcheries which raise approximately 10 million trout for California anglers statewide, and nine salmon hatcheries that raise over 31 million young salmon and steelhead.
For more information on whirling disease, please visit http://whirlingdisease.montana.edu.


Hot Creek Hatchery Tests Positive for Whirling Disease, Trout Stocking to Continue in Area Waters - June 9, 2015

The California Department of Fish and Wildlife (CDFW) recently learned Hot Creek Hatchery near Mammoth Lakes has tested positive for the parasite that causes whirling disease. Whirling disease was detected in wild trout populations in Inyo and Mono Counties more than 30 years ago. Therefore, continued fish stocking in these and other waters already known to have the whirling disease parasite should have little or no effect on those trout populations. Hot Creek, Lake Crowley and the Owens River provide blue ribbon trout fishing despite the presence of whirling disease in these waters.
"We will continue to operate Hot Creek Hatchery with no negative effects on wild fish in Inyo and Mono counties, where Hot Creek Hatchery normally stocks its fish," said CDFW Fisheries Branch Chief Stafford Lehr.
Last week, two northern California hatcheries, Darrah Springs and Mt. Shasta, also tested positive for this parasite. Of the 22 hatcheries operated by CDFW throughout the state, only these three have tested positive. The disease was discovered as a result of routine annual checks for fish diseases which are conducted at all CDFW hatcheries.
Whirling disease is caused by Myxobolus cerebralis, a protozoan parasite that destroys cartilage in the vertebral column of trout and salmon. It is fatal or disfiguring to infected trout and salmon but does not affect humans. Fish infected with whirling disease are safe for human consumption.
At this time it is not known how the parasite entered Hot Creek Hatchery waters. The possibility the parasite was transferred to the hatchery from local nearby waters known to have whirling disease is likely, due to current drought conditions that cause wildlife to move to available waters sources. Some species of fish-eating birds can transmit the parasite. For more information on whirling disease, please visit http://whirlingdisease.montana.edu.

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