October 25, 2018 — With concerns growing over a likely bait shortage in the lobster industry in Maine and Canada due to a drastic cut in the upcoming season’s herring quota, Nova Scotia resident Patrick Swim has a possible solution. Swim thinks he can solve the bait shortage by harvesting an invasive species.
Silver carp is one of the four species of the invasive Asian carp (silver, bighead, grass, and black) that have placed the Great Lakes water system at risk. Carp were brought to North America in the 1970s as a biological control of algae, plants, and snails in aquaculture sites. Subsequent flooding allowed them to escape their pens, which created a new problem for the environment and marine life. A mature meter-long carp can weight 40 kilograms and consume up to 40 percent of their body weight each day, which puts stress on resources for native species. They also reproduce rapidly.
Swim was intrigued by reports that silver carp are so disturbed by noise and vibration caused by boat motors that they jump up to three meters out of the water. While looking at this flying fish phenomenon, Swim, whose family have long fished lobster on Canada’s Cape Sable Island, had an idea to harvest the carp, freeze it, cut it into pieces and sell it as a cheap bait to East Coast lobster fishermen.
In the past decades, Asian carp have replaced native fish species in areas of the Mississippi River and its tributaries. Their advance towards the Great Lakes has spurred the U.S. Army Corps of Engineers, U.S. Fish and Wildlife Service, U.S. Coast Guard, U.S. Environmental Protection Agency, and the Illinois Environmental Protection Agency to spend tens of millions of dollars annually trying to contain them. So far, electro-magnetic fields and fish fences have prevented all but a few carp from entering the lakes.