Lake whitefish and lake herring population structure and niche in ten south-central Ontario lakes
Identifieur interne : 000885 ( Main/Exploration ); précédent : 000884; suivant : 000886Lake whitefish and lake herring population structure and niche in ten south-central Ontario lakes
Auteurs : Leon M. Carl [Canada] ; Fiona Mcguiness [Canada]Source :
- Environmental biology of fishes [ 0378-1909 ] ; 2006.
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- topic : Milieu marin.
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Abstract
Synopsis This study compares simple fish communities of ten oligotrophic lakes in south-central Ontario. Species densities and population size structure vary significantly among these lake communities depending on fish species present beyond the littoral zone. Lake whitefish are fewer and larger in the presence of lake herring than in their absence. Diet analysis indicates that lake whitefish shift from feeding on both plankton and benthic prey when lake herring are absent to a primarily benthic feeding niche in the presence of lake herring. When benthic round whitefish are present, lake whitefish size and density decline and they move lower in the lake compared to round whitefish. Burbot are also fewer and larger in lakes with lake herring than in lakes without herring. Burbot, in turn, appear to influence the population structure of benthic coregonine species. Lower densities of benthic lake whitefish and round whitefish are found in lakes containing large benthic burbot than in lakes with either small burbot or where burbot are absent. Predation on the pelagic larvae of burbot and lake whitefish by planktivorous lake herring alters the size and age structure of these populations. As life history theory predicts, those species with poor larval survival appear to adopt a bet-hedging life history strategy of long-lived individuals as a reproductive reserve.
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<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en" level="a">Lake whitefish and lake herring population structure and niche in ten south-central Ontario lakes</title><author><name sortKey="Carl, Leon M" sort="Carl, Leon M" uniqKey="Carl L" first="Leon M." last="Carl">Leon M. Carl</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Harkness Laboratory of Fisheries Research, Aquatic Research and Development Section, Ministry of Natural Resources, Trent University, 1600 West Bank Drive, P.O. Box 4840</s1><s2>Peterborough, ON</s2><s3>CAN</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ></inist:fA14><country>Canada</country><wicri:noRegion>Peterborough, ON</wicri:noRegion></affiliation></author><author><name sortKey="Mcguiness, Fiona" sort="Mcguiness, Fiona" uniqKey="Mcguiness F" first="Fiona" last="Mcguiness">Fiona Mcguiness</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Harkness Laboratory of Fisheries Research, Aquatic Research and Development Section, Ministry of Natural Resources, Trent University, 1600 West Bank Drive, P.O. Box 4840</s1><s2>Peterborough, ON</s2><s3>CAN</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ></inist:fA14><country>Canada</country><wicri:noRegion>Peterborough, ON</wicri:noRegion></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">INIST</idno><idno type="inist">06-0328745</idno><date when="2006">2006</date><idno type="stanalyst">PASCAL 06-0328745 INIST</idno><idno type="RBID">Pascal:06-0328745</idno><idno type="wicri:Area/PascalFrancis/Corpus">000064</idno><idno type="wicri:Area/PascalFrancis/Curation">000054</idno><idno type="wicri:Area/PascalFrancis/Checkpoint">000062</idno><idno type="wicri:explorRef" wicri:stream="PascalFrancis" wicri:step="Checkpoint">000062</idno><idno type="wicri:doubleKey">0378-1909:2006:Carl L:lake:whitefish:and</idno><idno type="wicri:Area/Main/Merge">000899</idno><idno type="wicri:Area/Main/Curation">000885</idno><idno type="wicri:Area/Main/Exploration">000885</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">Lake whitefish and lake herring population structure and niche in ten south-central Ontario lakes</title><author><name sortKey="Carl, Leon M" sort="Carl, Leon M" uniqKey="Carl L" first="Leon M." last="Carl">Leon M. Carl</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Harkness Laboratory of Fisheries Research, Aquatic Research and Development Section, Ministry of Natural Resources, Trent University, 1600 West Bank Drive, P.O. Box 4840</s1><s2>Peterborough, ON</s2><s3>CAN</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ></inist:fA14><country>Canada</country><wicri:noRegion>Peterborough, ON</wicri:noRegion></affiliation></author><author><name sortKey="Mcguiness, Fiona" sort="Mcguiness, Fiona" uniqKey="Mcguiness F" first="Fiona" last="Mcguiness">Fiona Mcguiness</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Harkness Laboratory of Fisheries Research, Aquatic Research and Development Section, Ministry of Natural Resources, Trent University, 1600 West Bank Drive, P.O. Box 4840</s1><s2>Peterborough, ON</s2><s3>CAN</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ></inist:fA14><country>Canada</country><wicri:noRegion>Peterborough, ON</wicri:noRegion></affiliation></author></analytic><series><title level="j" type="main">Environmental biology of fishes</title><title level="j" type="abbreviated">Environ. biol. fishes</title><idno type="ISSN">0378-1909</idno><imprint><date when="2006">2006</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">Environmental biology of fishes</title><title level="j" type="abbreviated">Environ. biol. fishes</title><idno type="ISSN">0378-1909</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Age</term><term>Bet hedging strategy</term><term>Catch effort</term><term>Clupea harengus</term><term>Diet</term><term>Ecological niche</term><term>Freshwater environment</term><term>Lake Ontario</term><term>Marine environment</term><term>Pisces</term><term>Population structure</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Lac Ontario</term><term>Pisces</term><term>Structure population</term><term>Niche écologique</term><term>Effort pêche</term><term>Régime alimentaire</term><term>Age</term><term>Milieu eau douce</term><term>Milieu marin</term><term>Clupea harengus</term><term>Stratégie minimisation risque</term></keywords><keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Milieu marin</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Synopsis This study compares simple fish communities of ten oligotrophic lakes in south-central Ontario. Species densities and population size structure vary significantly among these lake communities depending on fish species present beyond the littoral zone. Lake whitefish are fewer and larger in the presence of lake herring than in their absence. Diet analysis indicates that lake whitefish shift from feeding on both plankton and benthic prey when lake herring are absent to a primarily benthic feeding niche in the presence of lake herring. When benthic round whitefish are present, lake whitefish size and density decline and they move lower in the lake compared to round whitefish. Burbot are also fewer and larger in lakes with lake herring than in lakes without herring. Burbot, in turn, appear to influence the population structure of benthic coregonine species. Lower densities of benthic lake whitefish and round whitefish are found in lakes containing large benthic burbot than in lakes with either small burbot or where burbot are absent. Predation on the pelagic larvae of burbot and lake whitefish by planktivorous lake herring alters the size and age structure of these populations. As life history theory predicts, those species with poor larval survival appear to adopt a bet-hedging life history strategy of long-lived individuals as a reproductive reserve.</div></front></TEI><affiliations><list><country><li>Canada</li></country></list><tree><country name="Canada"><noRegion><name sortKey="Carl, Leon M" sort="Carl, Leon M" uniqKey="Carl L" first="Leon M." last="Carl">Leon M. Carl</name></noRegion><name sortKey="Mcguiness, Fiona" sort="Mcguiness, Fiona" uniqKey="Mcguiness F" first="Fiona" last="Mcguiness">Fiona Mcguiness</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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