The twin ports of Superior, Wisconsin and Duluth, Minnesota were founded at the head of the world's greatest continuous mass of freshwater. The Laurentian Great Lakes contain about 20% of the world's freshwater resources. ...

A primary threat to Great Lakes sport and commercial fisheries arises from contamination problems due to the introduction of certain xenobiotic chemicals in aquatic environments. Of particular concern are hydrophobic ...

The Fox River is a major tributary into Lake Michigan's Green Bay with an average discharge of 117 m3 sec-1 and an average gradient of 0.81 m km-1 in the last 62 km of the river (Epstein et al., 1974). Since the early ...

Acute flow-through toxicity tests were conducted with 1 nin e chlorinated organic compounds and four species of freshwater organisms. Eight compounds (1 ,2-dichlorobenzene, 1 ,4-dichlorobenzene, 1,2,4-tirchlorobenzene,hexa­ ...

The Center for Lake superior Environmental studies (CLSES) was created in the late 1960's, a period of national environmental concern. The founding scientists, from the departments of biology, chemistry, geology and ...

Over 60,000 chemicals exist in United States commerce (U.S. EPA, 1982). This inventory expands each year as 200 to l,000 new chemicals are advanced into commercial production (Muir, 1980). ...

Acute toxicity values for aquatic life continue to be useful for pre­liminary assessment of the potential for harm in the environment by chemicals. The end-point for an Lc50 (concentration of chemical necessary to kill ...

In this, the fourth volume of acute toxicity data on organic chemi­cals, we pay tribute to the species which has made this possible. The fathead minnow (Pimephales promelas) is well suited to laboratory studies and was ...

The contents of the second volume of Acute Toxicities of Organic Chemicals to Fathead Minnows (Pimephales promelas} provide additional infor­mation for the ongoing development of an aquatic toxicology data ...