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RECORD NUMBER: 4 OF 11

OLS Field Name OLS Field Data
Main Title Experimental acidification of Little Rock Lake (Wisconsin) : fish research approach and early responses /
Author Swenson, W. A. ; McCormick, J. H. ; Simonson, T. D. ; Jensen, K. M. ; Eaton, J. G.
Other Authors
Author Title of a Work
McCormick, J. H.
Simonson, T. D.
Jensen, K. M.
Eaton, J. G.
CORP Author Environmental Research Lab.-Duluth, MN. ;Wisconsin Univ.-Superior. Center for Lake Superior Environmental Studies. ;American Scientific International, Inc., McLean, VA.
Publisher [U.S. Environmental Protection Agency, Office of Research and Development, Environmental Research Laboratory--Duluth],
Year Published 1989
Report Number EPA/600/J-89/023
Stock Number PB89-198006
Additional Subjects Lakes ; Acidification ; Fresh water fishes ; Tables(Data) ; Survival ; Reproduction(Biology) ; Growth ; Reprints ; Acid rain ; Air pollution effects(Animals) ; Aquatic ecosystems ; Little Rock Lake(Wisconsin)
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
NTIS  PB89-198006 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 01/01/1988
Collation 11 pages ; 28 cm
Abstract
One goal of research at Little Rock Lake, Wisconsin is to enhance understanding of lake acidification effects on warm- and cool-water fishery resources. The Little Rock Lake fish assemblage is characteristic of many acid sensitive waters in North America and is dominated by yellow perch (Percidae) and sunfishes (Centrarchidae). Analyses of reproduction, early survival and growth rates in the field were designed around the differing reproductive modes of these taxa. Complementary laboratory research on early life stages was conducted to assist in isolating direct effect mechanisms and to determine the reliability of laboratory results in predicting field response. Preliminary findings suggest that lake acidification to pH 5.6 has not influenced reproductive activity of the four most abundant fish species. However, the field results suggest that year-class failure of rock bass (Ambloplites rupestris) may be occurring due to reduced survival of early life stages. Reduced growth and food conversion efficiency of Age 0 largemouth bass (Micropterus salmoides) is also suggested. The laboratory bioassays indicate rock bass is the most acid-sensitive Little Rock Lake species tested. However, rock bass fry survival was not significantly affected until pH was reduced from 5.6 to 5.0. (Copyright (c) 1989 Springer-Verlag.)
Notes
Reprint of an article appearing in Archives of Environmental Contamination and Toxicology, 35:1, pp.167-174, January 1989." Includes bibliographical references. Journal article. Microfiche.