High mercury levels in fish at the gorge

Kokanee Fishing Forums

Help Support Kokanee Fishing Forums:

Propnut69

Well-known member
Joined
Jun 5, 2008
Messages
595
Location
Green River Wyo
KSL Outdoors has learned of elevated mercury levels in fish at Flaming Gorge.

According to recent sampling conducted by the Wyoming Game and Fish Department, there are some species of fish with mercury levels high enough to warrant consumption guidelines. In Flaming Gorge reservoir, large lake trout, large smallmouth bass, and larger burbot have elevated levels of mercury. Large burbot, those thirty inches and above tested the highest in elevated mercury levels. Mercury levels are usually found the highest in fish that feed on other fish and are usually the highest in bigger, older fish.

In the coming weeks, the Wyoming Department ofHealth and the Wyoming Game and Fish will release an advisory that deals with consumption of fish for those caught in Flaming Gorge Reservoir. The guidelines they’ll recommend are; pregnant women, nursing mothers, women of child bearing age and kids under 15 should limit their consumption of burbot under 25 inches to 4 meals per month. Women and children should avoid eating burbot from Flaming Gorge thatare larger than 30 inches.

The advisory will also urge people to balance the health benefits of eating fish. As fish are high in protein and othernutrients, low in fat, and have omega-3 fatty acids needed for healthy heart and brain development.

We’ll have more on KSL Outdoors, this Saturday on not only the mercury issues with the fish at the gorge, but we’ll also talk to biologists about their recent trend netting survey on burbot. In some parts of the reservoir, biologists are seeing as much as a 60% increase! We’ll also have some information on this years Burbot Bash. It looks like there will be 20-25 burbot tagged this year. Three of the fish will be worth cash prizes. One fish is going to be worth $10,000.00, another worth $2,500.00 and one worth $1,000.00. They also plan on having cash prizes for the most, biggest and most caught. The Burbot Bash is scheduled to take place Feb 1st-3rd.

I wanted to get this mercury information out as soon as we could verify the information we’d received. Thanks,

Adam Eakle
 
I'm kind of surprised that biologists haven't concluded that mercury is just naturally occuring in fish. I don't believe I've ever heard of a fish or a body of water where the fish didn't test positive for mercury.
 
I'm kind of surprised that biologists haven't concluded that mercury is just naturally occuring in fish. I don't believe I've ever heard of a fish or a body of water where the fish didn't test positive for mercury.

Mercury is usually not naturally occurring at high concentrations in fresh water unless there is some unique geology. All other sources are from pollution. MOST bodies of water do not have enough mercury to result in an advisory.....
 
Just in time for Christmas a news release reported that largemouth & smallmouth bass,walleye and yellow perch were found to have high mercury levels.Other lakes in our mountains have warnings for walleye.Supposedly our contamination comes from being downwind of Birmingham Al. steel mills. I'm with SuperD it seems like every time fish are tested contamination is found. I wonder if Ryno or any other fishery profeesionals on KFF know of any contamination problems in kokanee?
 
As sad as it is, I think one of the contributors to the mercury levels at the gorge is the trona mines that are all up stream and around the green river that go in through ground water, exhausts from the mines into the air that then with the good old Wyoming wind, end up down stream into the lake. Just my two pesos!
 
Lake Whatcom in Washington has the same Mercury advisory. The middle fork of the Nooksack river picks up the mercury on Mt. Baker. It is then transported down stream to a diversion dam( built to keep the lake full for our pulp mill). The water that dosen't go into the lake goes to the bay. The estimate I heard was 22 lbs. of cinnabar ( mercury ore ) per day make it to the bay.
 
Mark

The kokes only live 4 or 5 years compared to other fish that can live much longer. Was wondering how much dangerous mercury the kokes can absorb in their short life span? I do eat a lot kokes and trout taken from the area during the summer.
 
Hey Ron,I hear you I hope their relatively short life span and their diet keeps mercury at bay.The regional biologist said he may check kokes for mercury at some point,but we still haven't heard much about the otolith aging process,so I ain't holding my breath. Hope you're doing well in sunny Fla. I got a 25.5" 6lb 2oz brown in the gorge last week,my best trout in 15 years.thumbsup
 
im not really sure just how much mercury the kokanee would have. based on the info i have read from their short life spans, not being a predator fish, i would have to believe that there would be some amounts of mercury, however it would have to be small amounts. once again, just my thoughts
 

Latest posts

Back
Top