Invasive green crab population reaches record high in Shediac Bay

The population of green crabsin Shediac Bay has exploded this year, saysJim Weldon,of theShediacBay Watershed Association.

Weldon, thegreen crab project manager, has been monitoring numbers of the aggressive invasive species since 2013.

"This is the highest numberswe've ever seen," he said.

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Weldonattributes the harsh winter of 2014with keeping numbers at bay last year.

"The ice was thick, the crabs that were hibernating in the mudwere crushed, the numbers were way down."

Weldon checks 10 trapsonce a month between May and September. Last year he found 80 green crabs in total.

But this year, he said the numbers are increasing. InMay, he trapped 111 crabs, and in June, 154 green crabs were caught.

"This year we're seeing huge numbers. We've already checked a few traps today and they are already more than we had last month."

The aggressive invasive crustacean can wreak havocon eelgrass beds that provide shelter to other aquatic life.

"They are going to go after the seed populations of mussels, oysters, quahogs and anything that is small enough that they can open."

Fishing licence exchange

Fisheries and Oceans Canada started a pilot program in 2015 that allows eel fisherman to exchange their licence for a green crab fishing licence.

In the first year, one fisherman in New Brunswick took part in the program, but in 2016, no one in the province expressed interest. There were fewer fishermen in P.E.I. and the Gulf of Nova Scotia participatingthis year as well.

But Weldon and officials with DFOsaidthere isn't much of a market for the crabs yet. The green crabscan be used as bait or compost and are eaten in parts of Europe and in Korea, but not here.

InNova Scotia, Parks Canada invites tourists to lend a hand in keeping green crab numbers down.

For $30 each, tourists get a 20-minuteATV ride down to the coast, a rowboat ride out to any of the 55 buoys in a specific estuary, and a chance to haul up as many crabs as they want. The crabs are thenkilled by placing them in a freshwater tank.

Weldon said if something isn't done to control the populationin New Brunswick, the numbers will most likely continue to increase.

"They produce a large number of eggs. So, if the conditions are good, which they seem to be in Shediac Bay, we're going to have a large population again next year."