7170

• UCREFRP Catalog Number: 7170
• Author: Meyer, F. P. and L. A. Barclay
• Title: Editor
• USFW Year: Series
• USFW - Doc Type: 1990
• Copyright Material: NO

TOXIC SUBSTANCES 39

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1
The survival or death of invertebrates, such as crayfish, is a valuable clue to the cause of
a fish kill.
Fish kills sometimes affect large areas. Many millions of fish were killed along several hundred
miles of the Mississippi River and over large areas in its delta at the Gulf of Mexico by the dumping
of a large quantity of a pesticide.