fish

Antidepressants that people take are building up in the brains of fish like walleye, bass, and perch. Researchers studied fish from the Niagara River, which connects lakes Erie and Ontario.

Anglers target bowfishermen for carp decrease

Aug 7, 2017
Max Johnston

Many people consider carp to be a ‘trash fish,’ but fly fishing for carp is very popular in northern Michigan. This year though, guides have cancelled trips and lost thousands of dollars because they can’t find the fish.

 

Some blame another growing sport: bowfishing.

The International Joint Commission, a treaty organization that advises the United States and Canada, says the two countries should do more to keep microplastics out of the lakes.

Microplastics are tiny pieces of plastic that are five millimeters or smaller. Microbeads are used in things like soap and toothpaste. Microfibers are tiny fibers that wash off our synthetic clothing, like fleece.

Those tiny plastics can end up in the Great Lakes and can get into fish.

Peter Payette

Scientists have been worried about the lake herring population in Lake Superior recently. In fact, last year they warned it could be headed towards a collapse.

Lake Superior is the only Great Lake that still has a significant population of herring - or cisco as they're commonly called.

This fall, new rules protecting herring took effect in Wisconsin and Minnesota and things appear more stable. But there may still be a big problem lying beneath the surface.

It’s the busy time of year for commercial fishing on the Great Lakes. But the price of whitefish is about half what it was three years ago, because of problems with international trade.

Michigan lawmakers are talking about banning tiny balls of plastic in products sold in Michigan.

A lot of us use products with microbeads in them. They’re tiny, perfectly round plastic beads that companies add to face and body scrubs and toothpaste.

We wash them down the drain, but they’re so small that wastewater treatment plants can’t filter them out.

Michigan Radio

Fisheries managers in Michigan are enlisting fishermen in the fight against Asian carp infestation. The state Department of Natural Resources is asking anglers to inspect their live bait for juvenile Asian carp.

The small fish look very similar to minnows and other common types of bait but their eyes are set lower on their bodies. DNR Resources Manager Nick Popoff says their eyes are “sub-terminal.”

Researchers with the U.S. Geological Survey have been monitoring pesticides in rivers and streams around the country for 20 years. They just released their findings, and they found there are levels of some pesticides that could be a concern for bugs and fish.

For example, they found the insecticide fibronil at levels that could cause harm. That chemical disrupts insects’ nervous systems.

The study, "Pesticides in U.S. Streams and Rivers:  Occurrence and trends during 1992-2011” is published in the Environmental Science and Technology journal. 

Wes Stone, a hydrologist with the USGS, says some pesticides have been phased out and others have come on the market, and you can see that directly reflected in the water.

“What it shows is to stay on top of what’s in the environment, we’re going to have to constantly evolve and keep looking at the newest ones and evolving new methods to sample for them," he says.

But Stone says their study probably underestimates potential risks to aquatic life. He says there are more than 400 different pesticides in use, but he says funding is limited, so his agency only tests for a fraction of those pesticides in rivers and streams.