ais – Aquarius-Systems

Aquatic Invasive Species Population Stabilized

Wed, 07 Dec 2022 16:49:11 +0000

A new study by the Wisconsin Department of Natural Resources has shown that ongoing efforts to prevent the spread of aquatic invasive species have been successful.

The spread of aquatic invasive species has remained stable in the 1,000 Wisconsin lakes used in the study. Invasive species are still present in 75% of the lakes, but 90% of the lakes remain zebra mussel free and 75% did not have milfoil.

Starry Stonewort Threat Growing in Minnesota Lakes

Tue, 20 Sep 2022 21:03:45 +0000

It’s only found in 14 Minnesota lakes at this point, but starry stonewort has the potential to cause lots of harm, and fast.

Recent research shows that the macroalgae has the potential to be the high-impact invader in Minnesota lakes that many already fear it is. It warrants the high prioritization that public agencies and many in the public are giving it.

Those are the conclusions of Carli Wagner, a graduate student with the Minnesota Aquatic Invasive Species Research Center, an interdisciplinary research center at the University of Minnesota.

Robots and Electric Tech Take on Invasive Aquatic Species

Wed, 31 May 2017 21:00:03 +0000

In the fight against alien animals that invade and overrun native species, the weird and the wired sometime win.

Invasive species are plants and animals that thrive in areas where they don’t naturally live, usually brought there by humans, either accidentally or intentionally. Sometimes, with no natural predators, they multiply and take over, crowding out and at times killing native species.

A new underwater robot is targeting the stunning but dangerous lionfish. The robot, called Guardian LF1, uses a gentle shock to immobilize the lionfish before they are sucked alive into a tube. In its first public outing this month, the robot caught 15 lionfish during two days of testing in Bermuda. Top chefs competed in a cook-off of the captured lionfish which sells for nearly $10 a pound.

U.S. Fish and Wildlife officials are using souped-up old technology to catch Asian carp, a fish that’s taken over rivers and lakes in the Midwest. They use a specialized boat – the Magna Carpa – with giant winglike nets that essentially uses electric current as an underwater taser to stun the fish, said biologist Emily Pherigo. At higher doses, the fish are killed and float to the surface. In just five minutes, they can collect 500 fish, and later turn them into fertilizer.
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