Lake trout demographics in relation to burbot and coregonine populations in the Algonquin Highlands, Ontario
Identifieur interne : 000726 ( Main/Exploration ); précédent : 000725; suivant : 000727Lake trout demographics in relation to burbot and coregonine populations in the Algonquin Highlands, Ontario
Auteurs : Leon M. Carl [Canada]Source :
- Environmental biology of fishes [ 0378-1909 ] ; 2008.
Descripteurs français
- Pascal (Inist)
- Wicri :
- topic : Démographie, Recrutement.
English descriptors
- KwdEn :
Abstract
The objective of the study was to test the hypothesis that lake trout populations change in relation to cisco, lake whitefish, round whitefish and burbot populations in lakes in the Algonquin Highlands region of Ontario. Lake trout population change is greatest where cisco and lake whitefish are present. Lake trout populations in lakes without either coregonine tend to have small adults and many juveniles. Where cisco or lake whitefish are present, adult lake trout are large, juvenile abundance is low, and the stock-recruit relationship appears to be uncoupled likely due to a larval bottleneck. Lake trout populations in these lakes may be sensitive to overfishing and recruitment failure. Lake trout populations do not appear to change in relation to round whitefish. There appears to be an indirect positive change on juvenile lake trout abundance through reductions in the density of benthic coregonines in the presence of large, hypolimnetic burbot.
Affiliations:
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Le document en format XML
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<affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Harkness Laboratory of Fisheries Research, Aquatic Research and Development Section, Ontario Ministry of Natural Resources, Trent University, 1600 West Bank Drive, P.O. Box 4840 Peterborough</s1>
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<series><title level="j" type="main">Environmental biology of fishes</title>
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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Bottleneck</term>
<term>Demography</term>
<term>Freshwater environment</term>
<term>Larva</term>
<term>Ontario</term>
<term>Overexploitation</term>
<term>Overfishing</term>
<term>Pisces</term>
<term>Population dynamics</term>
<term>Recruitment</term>
<term>Salvelinus namaycush</term>
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<keywords scheme="Pascal" xml:lang="fr"><term>Démographie</term>
<term>Ontario</term>
<term>Recrutement</term>
<term>Larve</term>
<term>Goulot étranglement</term>
<term>Surexploitation</term>
<term>Pisces</term>
<term>Milieu eau douce</term>
<term>Dynamique population</term>
<term>Salvelinus namaycush</term>
<term>Surpêche</term>
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<front><div type="abstract" xml:lang="en">The objective of the study was to test the hypothesis that lake trout populations change in relation to cisco, lake whitefish, round whitefish and burbot populations in lakes in the Algonquin Highlands region of Ontario. Lake trout population change is greatest where cisco and lake whitefish are present. Lake trout populations in lakes without either coregonine tend to have small adults and many juveniles. Where cisco or lake whitefish are present, adult lake trout are large, juvenile abundance is low, and the stock-recruit relationship appears to be uncoupled likely due to a larval bottleneck. Lake trout populations in these lakes may be sensitive to overfishing and recruitment failure. Lake trout populations do not appear to change in relation to round whitefish. There appears to be an indirect positive change on juvenile lake trout abundance through reductions in the density of benthic coregonines in the presence of large, hypolimnetic burbot.</div>
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