Fish
Michigan fish-sorter has global implications
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A $20 million test facility used to find how to keep undesirable fish from moving upstream without using a dam is coming to Michigan’s Boardman River.
Great Lakes Echo (http://greatlakesecho.org/tag/sea-lamprey/)
A $20 million test facility used to find how to keep undesirable fish from moving upstream without using a dam is coming to Michigan’s Boardman River.
Multiple methods needed to control destructive Great Lakes invader.
The Sixth Street Dam in Grand Rapids used to be a valuable tool in log transportation, but its planned removal now poses an environmental risk by endangering snuffbox mussels and potentially allowing the invasive sea lamprey to spread.
A recent study says that the test could help target streams for treatment and sort invasive lamprey from those that are native.
A pheremone that could lure the destructive sea lamprey to its death has gained registration as the first biopesticide for a vertebrate.
Cryptic chemicals associated with life and death can push and pull this parasitic invader.
The Nature Conservancy has animated how six invasive species have spread across the Great Lakes over time. The group has created six maps that show population increase and spread since the appearance of each species in the Great Lakes basin and beyond. Sea lamprey, the first of the six invasive species to appear in the area, initially showed up in Lake Erie in 1921. The map shows the population of the fish expanding into the rest of the Great Lakes up until present day. Also included in the maps are Asian carp, zebra and quagga mussels, round goby, Eurasian Ruffe and black carp.
A U.S. and Canadian control project has knocked back the invasive species that prey on fish by 90 percent.
But researchers are trying to address a recently increasing population.
By Evan KreagerGreat Lakes Echo
The Nature Conservancy has named sea lampreys one of the five “usual suspects” invading the Great Lakes basin. These eel-looking parasites find a host and suck the life out of it. During the length of one life cycle, a sea lamprey can kill up to 40 pounds worth of fish and can grow up to 3 feet long. Sea lampreys are native to the Atlantic Ocean, Lake Ontario and the St. Lawrence River.
Tips to avoid an animal attack – with a Great Lakes twist.