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A coalition of conservation groups wants the federal government to agree to a plan to wipe out a population of smallmouth bass from a New Brunswick lake in order to protect salmon in the revered Miramichi River.

The North Shore Micmac District Council – a regional body representing Mi’kmaq nations in the Miramichi area – is leading a push to eradicate the invasive bass from Miramichi Lake using a toxin called rotenone.

Several other groups have come out in support of the council’s application to the federal Department of Fisheries and Oceans, including the Atlantic Salmon Federation.

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Neville Crabbe, a spokesman for the federation, says it appears someone introduced the smallmouth bass to the lake in 2008 and they have been increasing in numbers ever since.

“Smallmouth bass are a voracious, aquatic invasive species in New Brunswick. They are not native to this part of the world,” said Crabbe.

He said the concern is that smallmouth bass can alter the entire ecosystem in several ways.

“They compete for habitat. They compete for prey. And they also consume native species like trout and salmon, which have been a feature of human life on the Miramichi for thousands of years,” he said.

A report prepared for the DFO in 2008 recommended complete eradication of the smallmouth bass from the lake.

The report stated that removal of part of the smallmouth bass population was “not likely to eliminate the risks” or prevent the invasive fish from spreading throughout the Miramichi River system.

“Complete eradication is the only option that will prevent further dispersal,” the 2008 report states.

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Despite the report’s recommendation, the department decided to put in a barrier and try to remove smallmouth bass from the lake – an approach Crabbe said has so far proven expensive and ineffective.

At least 30 of the fish have been caught recently after apparently getting past the barrier, he said.

The river system leading to Miramichi Lake is also a significant annual run for spawning river herring: the adults must be scooped out of the river and put into the lake, while the young have to be scooped from the lake and put into the river.

Crabbe said that’s likely how some of the smallmouth bass are inadvertently getting into the river system.

“It’s a little puzzling and frustrating. What we’re staring at here is a preventable tragedy 10 years in the making,” he said.

He said the eradication method has been used successfully in a number of provinces, and the ecosystems in the impacted waters often rebound stronger than they were before.

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The Department of Fisheries and Oceans did not immediately have a comment on the matter or the status of the application to eradicate on Tuesday.

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