In a battle against fishy invaders, Illinois has netted a massive win. The state's Department of Natural Resources (IDNR) fisheries biologists, in tandem with contracted commercial fishers and associates from the Illinois River Biological Station, spearheaded an extensive 10-day harvest that plucked out a staggering 750,000 pounds of silver carp from the Illinois River. This operation ran from Nov. 27 to Dec. 6 and is being hailed as a record freshwater haul in the U.S., as stated in a recent announcement by the Illinois government.
What stands out in this operation, beyond the eye-popping numbers, is the use of a method that's both highly effective and situational. "This removal technique is highly effective, but it is also highly dependent on water levels and water temperature," Brian Schoenung, aquatic nuisance species program manager for IDNR, told the Illinois government news site. "This past week provided near-perfect conditions, which facilitated the record-breaking haul of fish." The state utilizes funding from the U.S. Environmental Protection Agency through the Great Lakes Restoration Initiative to keep these silver invaders at bay and has been particularly targeting the Starved Rock and Marseilles pools.
Efforts like these are a crucial defense mechanism against invasive carp breaching the Great Lakes. The operation at the electric dispersal barrier system near Romeoville is notably upheld by these fish removal strategies, which have helped tank fish density in upstream areas by nearly 95% over the last 13 years. This drastic reduction diminishes the chances of invasive carp getting near the barrier, which is vital for the preservation of the Great Lakes ecosystem.
Partnerships with commercial fishermen have been invaluable in this aquatic standoff. "Our partnership with contracted commercial fishers has been highly effective at preventing the upstream advance of invasive carp," IDNR's aquatic nuisance species program crew leader Justin Widloe stated. The operation uses a seine netting technique, encircling the carp from sides and below and hauling them bankside—a method that gains in effectiveness as the fishers' experience increases.
In 2022, these seine nets cornered 350,000 pounds of invasive carp. Flash forward to this year, and the technique has more than doubled its efficiency with the recent 750,000-pound score. According to the Illinois government's revelation, this just adds to the annual million-pound disposition of these pesky piscines from Illinois waterways. And with the local carp processors chipping in for trucking and removal logistics, it's an all-hands-on-deck scenario aiming to keep the Great Lakes safe from these aquatic intruders.
