Abstract	Although the uptake, storage, and elimination of contaminants by naiad mollusks has been studied, relatively little information is available on toxicity. Contaminants appear to have destroyed some populations directly by exerting toxic effects, or indirectly by causing or contributing to the elimination of essential food organisms or host fish. Often two or more factors appear to work in combination to producethe total stress that adversel affects populations. Naiad mollusks are important indicators of contaminants in the environment; residues in soft tissue indicate recent or current exposure, and residues in shells indicate past exposure. Resource publication 164
Alternative title	Resource publication (U.S. Fish and Wildlife Service), 164
Author	Marian E. Havlik
	Leif L. Marking
Owner	La Crosse Public LIbrary
Type of resource	text
Genre	book
Genre authority	marcgt
Publisher name	U. S. Department of the Interior, Fish and Wildlife Service
Place of publication	Washington, DC
Date published	1987
Date captured	2007-02-01
Language	eng
Width	7.8733335
Height	10.26
Subject topic	Unionidae--Effect on water pollution on Authority: LCSH
Subject topic	Mollusks--Effect on water pollution on Authority: LCSH
Note	OCLC: 15084166
Use and reproduction restrictions	This item is in the public domain. There are no known restrictions on the use of this material.
Collection	Natural Resources
ID	bc995770-1afe-4eae-8a59-2f0cddc6a16d/wlac0000/20140305/00000012