Record Display for the EPA National Library Catalog


Main Title Influence of turbidity on fish abundance in western Lake Superior /
Author Swenson, William A.,
CORP Author Wisconsin Univ.-Superior.;Environmental Research Lab.-Duluth, MN.
Publisher Environmental Protection Agency, Office of Research and Development, Environmental Research Laboratory, for sale by the National Technical Information Service, 1978.
Year Published 1978
Report Number EPA-600/3-78-067; EPA-R-802455
Stock Number PB-286 502
OCLC Number 04326563
ISBN pbk.
Subjects Fishes--Superior, Lake--Geographical distribution ; Zooplankton--Superior, Lake ; Fishes--Geographical distribution ; Lake Superior
Additional Subjects Turbidity ; Fresh water fishes ; Fishes ; Lake Superior ; Zooplankton ; Trout ; Herrings ; Flatfishes ; Larvae ; Abundance ; Survival ; Growth ; Gradients ; Clay soils ; Distribution ; Water pollution ; Animal behavior ; Responses ; Water pollution effects(Animals) ; Coregonus artedii ; Osmerus mordax ; Stizostedion vitreum ; Salvelinus namaycush ; Predation
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
EJBD  EPA 600-3-78-067 c.1 Headquarters Library/Washington,DC 03/25/2014
ELAD  EPA 600-3-78-067 Region 5 Library/Chicago,IL 05/16/2016
ELBD ARCHIVE EPA 600-3-78-067 Received from HQ AWBERC Library/Cincinnati,OH 10/04/2023
ELBD  EPA 600-3-78-067 AWBERC Library/Cincinnati,OH 04/10/1998
ELDD  EPA-600/3-78-067 CCTE/GLTED Library/Duluth,MN 08/09/2002
ESAD  EPA 600-3-78-067 Region 10 Library/Seattle,WA 08/22/2017
NTIS  PB-286 502 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation vii, 84 pages : illustrations, map ; 28 cm.
This research project was developed to improve understanding of the influence of turbidity on fish populations and the mechanism through which its effects are induced. Field and laboratory studies emphasized measurement of behavioral response of fish and resulting changes in fish species interrelationships in western Lake Superior. Direct effects of red clay turbidity on survival and growth of larval lake herring (Coregonus artedii) were also measured. Field measurements demonstrated that light penetration in western Lake Superior is reduced significantly even at very low levels of red clay turbidity. Zooplankton and fish abundance and distribution were influenced by turbidity. Zooplankton abundance and distribution was highest near the surface in red clay plumes. Smelt (Osmerus mordax) move into the upper 12 m of water in response to turbidity where their predation on larval fish increases. Predation by smelt on larval lake herring was identified as a potentially important factor contributing to the decline of the formerly abundant western Lake Superior lake herring population and the commercial fishery which depended upon it.
"Grant no. R802455." "July 1978." Includes bibliographical references (pages 69-72).