Study finds way to cut sea lamprey numbers

Oct 03, 2005

Minnesota scientists say they've found a way to reduce sea lamprey populations in the Great Lakes by attracting them to areas where they can be sterilized.

Lampreys are eel-like, blood-sucking creatures that have devastated Great Lakes fish populations for decades. But scientists at the University of Minnesota have discovered a chemical sex attractant that draws adult lampreys to spawning streams, where the males can be caught and sterilized, the St. Paul (Minn.) Pioneer Press reported Monday.

"This presents the possibility of a whole new environmentally safe tool for controlling sea lamprey in the Great Lakes,'' said Peter Sorensen, a university professor of fisheries, wildlife and conservation biology who led the study with chemistry professor Thomas Hoye.

Experts say the discovery, detailed in the November issue of Nature Chemical Biology, might also help control other problem species, such as carp.

Sea lampreys invaded the Great Lakes during the 1920s and 1930s, depleting such native fish as lake trout and whitefish. In Lake Huron, lampreys are blamed for reducing the lake's trout catch from 3.4 million pounds in 1937 to nothing by 1947.

Copyright 2005 by United Press International

Explore further: Ultra high definition TVs boost LG Display profit

add to favorites email to friend print save as pdf

Related Stories

Masses of plastic particles found in Great Lakes

Jul 30, 2013

Already ravaged by toxic algae, invasive mussels and industrial pollution, North America's Great Lakes now confront another potential threat that few had even imagined until recently: untold millions of plastic litter bits, ...

Scents latest weapons in fight against sea lamprey

Jan 02, 2011

(AP) -- In the never-ending battle to prevent blood-sucking sea lamprey from wiping out some of the most popular fish species in the Great Lakes, biologists are developing new weapons that exploit three certainties ...

Sea lamprey up in Lake Superior

Aug 27, 2005

The number of sea lamprey has nearly doubled in western Lake Superior in the past year, according to Minnesota and U.S. wildlife officials.

Recommended for you

Wyoming cave with fossil secrets to be excavated

5 hours ago

(AP)—For the first time in more than 30 years, paleontologists are preparing excavate a sinkhole-type cave in northern Wyoming that contains the ancient remains of tens of thousands of animals.

Awarded a Pell Grant? Better double-check

16 hours ago

(AP)—Potentially tens of thousands of students awarded a Pell Grant or other need-based federal aid for the coming school year could find it taken away because of a mistake in filling out the form.

User comments : 0