Quantcast

Groundbreaking Study Says Asian Carp Could Make Up One-Third of Lake Erie Biomass

By Padma Nagappan

Lake Erie is bountiful in highly prized walleye and rainbow trout. But populations of these commercially important fish could plummet if Asian carp manage to invade the lake, according to a new report.

In the groundbreaking study, scientists from the National Oceanic and Atmospheric Administration (NOAA) and the University of Notre Dame found that carp, which are moving at a rapid pace toward the Great Lakes, could make up one-third of all fish in Lake Erie by weight within 20 years if the invasive species overcomes efforts to keep it at bay.

Voracious eaters, Asian carp feed on plankton, which are tiny organisms which form the basis of the food web. Small fish that live in Lake Erie—the emerald shiner, gizzard shad and rainbow smelt—also feed on plankton and their numbers could fall dramatically if they have to compete with carp for food, according to the study. This would hurt the commercially valuable walleye, which eat the smaller fish.

Two Asian carp species found in the U.S.—the bighead carp and silver carp—have reached watersheds near the Great Lakes. In October 2015, U.S. Fish and Wildlife Service scientists discovered that silver carp had advanced a record 12 miles up the Illinois River in just one month, traveling 66 miles toward Lake Michigan since the beginning of 2015.

“Back in the 1970s, the carp were introduced purposely to clear out catfish farms in some ponds in Arkansas," Ed Rutherford, coauthor of the study and a fisheries biologist with the NOAA Great Lakes Environmental Research Laboratory, said. “They escaped from there during some flooding and made their way into the watershed of the Mississippi and are now very abundant in the Mississippi and the Illinois Rivers."

The carp now make up about 80 percent, by weight, of all the fish in those rivers, he said, but computer modeling study shows that the potential impact on Lake Erie would not be as extreme.

“That's because Lake Erie has more potential predators for young Asian carp than in those rivers," Rutherford said.

This article was reposted with permission from our media associate TakePart.

YOU MIGHT ALSO LIKE

Beloved Orca Found Dead Due to Entanglement in Fishing Gear

Oppose Welfare Ranching, Not Wolves

This Woman Wears 15,000 Bees to Help Others Connect to Nature

27,000 Pink Plastic Detergent Bottles Wash Up on UK Beach

EcoWatch Daily Newsletter

Pixabay

By Claire L. Jarvis

A ruckus over biofuels has been brewing in Iowa.

Read More Show Less
Serena and Venus Williams have been known to follow a vegan diet. Edwin Martinez / Flickr / CC BY 2.0

By Whitney E. Akers

  • "The Game Changers" is a new documentary on Netflix that posits a vegan diet can improve athletic performance in professional athletes.

  • Limited studies available show that the type of diet — plant-based or omnivorous — doesn't give you an athletic advantage.

  • We talked to experts about what diet is the best for athletic performance.

Packed with record-setting athletes displaying cut physiques and explosive power, "The Game Changers," a new documentary on Netflix, has a clear message: Vegan is best.

Read More Show Less
Sponsored
An illegally trafficked tiger skull and pelt. Ryan Moehring / USFWS

By John R. Platt

When it comes to solving problems related to wildlife trade, there are an awful lot of "sticky widgets."

Read More Show Less
Pexels

By Franziska Spritzler, RD, CDE

Inflammation can be both good and bad.

On one hand, it helps your body defend itself from infection and injury. On the other hand, chronic inflammation can lead to weight gain and disease.

Read More Show Less
Pexels

By Dan Nosowitz

It's no secret that the past few years have been disastrous for the American farming industry.

Read More Show Less
Sponsored
Pexels

By Gavin Van De Walle, MS, RD

Medium-chain triglyceride (MCT) oil and coconut oil are fats that have risen in popularity alongside the ketogenic, or keto, diet.

Read More Show Less
Pexels

By Bijal Trivedi

The Centers for Disease Control and Prevention (CDC) released a report on Nov. 13 that describes a list of microorganisms that have become resistant to antibiotics and pose a serious threat to public health. Each year these so-called superbugs cause more than 2.8 million infections in the U.S. and kill more than 35,000 people.

Read More Show Less
Rool Paap / Flickr / CC BY 2.0

By Franziska Spritzler, RD, CDE

Inflammation can be good or bad depending on the situation.

Read More Show Less