Document Detail


Does spatial variation in egg thiamine and fatty-acid concentration of Lake Michigan lake trout Salvelinus namaycush lead to differential early mortality syndrome and yolk oedema mortality in offspring?
MedLine Citation:
PMID:  22650429     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Individual variation in fatty-acid and thiamine concentrations were determined in lake trout Salvelinus namaycush eggs collected at two spawning grounds in Lake Michigan. A suite of predictor variables, including spawning location, egg fatty-acid and thiamine concentrations, were used to attempt to explain cause-and-effect in early life stage mortality among S. namaycush families. Lipid and fatty-acid composition of S. namaycush eggs differed between spawning locations. Salvelinus namaycush offspring from south-western Lake Michigan were affected by a high occurrence of yolk oedema, whereas a higher frequency of early mortality syndrome (EMS) was observed among offspring from the north-western part of the lake. Random-forest regressions revealed location as the most influential predictor of yolk oedema mortality, whereas thiamine level in eggs was the strongest predictor of EMS-related mortality. Several polyunsaturated fatty acids were also found to be predictors of both mortalities. There is evidence of spatial variability in egg fatty-acid concentration among S. namaycush in Lake Michigan that, together with diminished thiamine concentration, contribute to low survival of S. namaycush progeny.
Authors:
S J Czesny; J Rinchard; B-J Lee; K Dabrowski; J M Dettmers; Y Cao
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-5-2
Journal Detail:
Title:  Journal of fish biology     Volume:  80     ISSN:  1095-8649     ISO Abbreviation:  -     Publication Date:  2012 Jun 
Date Detail:
Created Date:  2012-6-1     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0214055     Medline TA:  J Fish Biol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  2475-2493     Citation Subset:  -    
Copyright Information:
© 2012 The Authors. Journal of Fish Biology © 2012 The Fisheries Society of the British Isles.
Affiliation:
Lake Michigan Biological Station, Illinois Natural History Survey, University of Illinois, 400 17th Street, Zion, IL 60099, U.S.A. Department of Environmental Science and Biology, The College at Brockport-State University of New York, 350 New Campus Drive, Brockport, NY 14420, U.S.A. School of Environment and Natural Resources, Ohio State University, 2021 Coffey Road, Columbus, OH 43210, U.S.A. Great Lakes Fishery Commission, 2100 Commonwealth Blvd, Suite 100, Ann Arbor, MI 48105, U.S.A. Illinois Natural History Survey, University of Illinois, 1816 South Oak Street, Champaign, IL 61820, U.S.A.
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