Genetic assessment of lake sturgeon (Acipenser fulvescens) population structure in the Ottawa River
Identifieur interne : 000748 ( Main/Merge ); précédent : 000747; suivant : 000749Genetic assessment of lake sturgeon (Acipenser fulvescens) population structure in the Ottawa River
Auteurs : Kristyne M. Wozney [Canada] ; Tim J. Haxton [Canada] ; Shawna Kjartanson [Canada] ; Chris C. Wilson [Canada]Source :
- Environmental biology of fishes [ 0378-1909 ] ; 2011.
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Abstract
Lake sturgeon (Acipenser fulvescens) are of conservation concern throughout their range. Many populations are dependent on fluvial habitats which have been increasingly impacted and fragmented by dams and human development. Although lake sturgeon were once abundant in the Ottawa River and its tributaries, historical commercial harvests and other anthropogenic factors caused severe declines and low contemporary numbers in lake sturgeon populations. Contemporary habitat fragmentation by dams may be increasing isolation among habitat patches and local rates of decline, raising concerns for persistence of local populations. We used microsatellite DNA markers to assess population structure and diversity of lake sturgeon in the Ottawa River, and analyzed samples from 10 sites that represent more than 500 km of riverine habitat. To test for evidence of anthropogenic fragmentation, patterns of genetic diversity and connectivity within and among river segments were tested for concordance with geographic location, separation by distance and obstacles to migration, considering both natural and artificial barriers as well as barrier age. Despite extensive habitat fragmentation throughout the Ottawa River, statistical analyses failed to refute panmixia of lake sturgeon in this system. Although the long generation time of lake sturgeon appears to have effectively guarded against the negative genetic impacts of habitat fragmentation and loss so far, evidence from demographic studies indicates that restoring connectivity among habitats is needed for the long-term conservation and management of this species throughout this river system.
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Haxton</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Ontario Ministry of Natural Resources, 300 Water St., 4th Floor S.</s1><s2>Peterborough, Ontario K9J 8M5</s2><s3>CAN</s3><sZ>2 aut.</sZ></inist:fA14><country>Canada</country><wicri:noRegion>Peterborough, Ontario K9J 8M5</wicri:noRegion></affiliation></author><author><name sortKey="Kjartanson, Shawna" sort="Kjartanson, Shawna" uniqKey="Kjartanson S" first="Shawna" last="Kjartanson">Shawna Kjartanson</name><affiliation wicri:level="1"><inist:fA14 i1="03"><s1>AECOM, 99 Commerce Drive</s1><s2>Winnipeg, MB R3P OY7</s2><s3>CAN</s3><sZ>3 aut.</sZ></inist:fA14><country>Canada</country><wicri:noRegion>Winnipeg, MB R3P OY7</wicri:noRegion></affiliation></author><author><name sortKey="Wilson, Chris C" sort="Wilson, Chris C" uniqKey="Wilson C" first="Chris C." last="Wilson">Chris C. Wilson</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Ontario Ministry of Natural Resources, 2140 East Bank Drive</s1><s2>Peterborough, Ontario K9J7B8</s2><s3>CAN</s3><sZ>1 aut.</sZ><sZ>4 aut.</sZ></inist:fA14><country>Canada</country><wicri:noRegion>Peterborough, Ontario K9J7B8</wicri:noRegion></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">INIST</idno><idno type="inist">11-0116375</idno><date when="2011">2011</date><idno type="stanalyst">PASCAL 11-0116375 INIST</idno><idno type="RBID">Pascal:11-0116375</idno><idno type="wicri:Area/PascalFrancis/Corpus">000096</idno><idno type="wicri:Area/PascalFrancis/Curation">000279</idno><idno type="wicri:Area/PascalFrancis/Checkpoint">000082</idno><idno type="wicri:explorRef" wicri:stream="PascalFrancis" wicri:step="Checkpoint">000082</idno><idno type="wicri:doubleKey">0378-1909:2011:Wozney K:genetic:assessment:of</idno><idno type="wicri:Area/Main/Merge">000748</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">Genetic assessment of lake sturgeon (Acipenser fulvescens) population structure in the Ottawa River</title><author><name sortKey="Wozney, Kristyne M" sort="Wozney, Kristyne M" uniqKey="Wozney K" first="Kristyne M." last="Wozney">Kristyne M. Wozney</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Ontario Ministry of Natural Resources, 2140 East Bank Drive</s1><s2>Peterborough, Ontario K9J7B8</s2><s3>CAN</s3><sZ>1 aut.</sZ><sZ>4 aut.</sZ></inist:fA14><country>Canada</country><wicri:noRegion>Peterborough, Ontario K9J7B8</wicri:noRegion></affiliation></author><author><name sortKey="Haxton, Tim J" sort="Haxton, Tim J" uniqKey="Haxton T" first="Tim J." last="Haxton">Tim J. Haxton</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Ontario Ministry of Natural Resources, 300 Water St., 4th Floor S.</s1><s2>Peterborough, Ontario K9J 8M5</s2><s3>CAN</s3><sZ>2 aut.</sZ></inist:fA14><country>Canada</country><wicri:noRegion>Peterborough, Ontario K9J 8M5</wicri:noRegion></affiliation></author><author><name sortKey="Kjartanson, Shawna" sort="Kjartanson, Shawna" uniqKey="Kjartanson S" first="Shawna" last="Kjartanson">Shawna Kjartanson</name><affiliation wicri:level="1"><inist:fA14 i1="03"><s1>AECOM, 99 Commerce Drive</s1><s2>Winnipeg, MB R3P OY7</s2><s3>CAN</s3><sZ>3 aut.</sZ></inist:fA14><country>Canada</country><wicri:noRegion>Winnipeg, MB R3P OY7</wicri:noRegion></affiliation></author><author><name sortKey="Wilson, Chris C" sort="Wilson, Chris C" uniqKey="Wilson C" first="Chris C." last="Wilson">Chris C. Wilson</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Ontario Ministry of Natural Resources, 2140 East Bank Drive</s1><s2>Peterborough, Ontario K9J7B8</s2><s3>CAN</s3><sZ>1 aut.</sZ><sZ>4 aut.</sZ></inist:fA14><country>Canada</country><wicri:noRegion>Peterborough, Ontario K9J7B8</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="2011">2011</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>Fragmentation</term><term>Freshwater environment</term><term>Genetic diversity</term><term>Genetics</term><term>Habitat</term><term>Ottawa River</term><term>Pisces</term><term>Population structure</term><term>Sturgeon Lake</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Génétique</term><term>Structure population</term><term>Habitat</term><term>Fragmentation</term><term>Diversité génétique</term><term>Pisces</term><term>Milieu eau douce</term><term>Acipenser fulvescens</term><term>Lac Sturgeon</term><term>Rivière Ottawa</term></keywords><keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Génétique</term><term>Habitat</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Lake sturgeon (Acipenser fulvescens) are of conservation concern throughout their range. Many populations are dependent on fluvial habitats which have been increasingly impacted and fragmented by dams and human development. Although lake sturgeon were once abundant in the Ottawa River and its tributaries, historical commercial harvests and other anthropogenic factors caused severe declines and low contemporary numbers in lake sturgeon populations. Contemporary habitat fragmentation by dams may be increasing isolation among habitat patches and local rates of decline, raising concerns for persistence of local populations. We used microsatellite DNA markers to assess population structure and diversity of lake sturgeon in the Ottawa River, and analyzed samples from 10 sites that represent more than 500 km of riverine habitat. To test for evidence of anthropogenic fragmentation, patterns of genetic diversity and connectivity within and among river segments were tested for concordance with geographic location, separation by distance and obstacles to migration, considering both natural and artificial barriers as well as barrier age. Despite extensive habitat fragmentation throughout the Ottawa River, statistical analyses failed to refute panmixia of lake sturgeon in this system. Although the long generation time of lake sturgeon appears to have effectively guarded against the negative genetic impacts of habitat fragmentation and loss so far, evidence from demographic studies indicates that restoring connectivity among habitats is needed for the long-term conservation and management of this species throughout this river system.</div></front></TEI><affiliations><list><country><li>Canada</li></country></list><tree><country name="Canada"><noRegion><name sortKey="Wozney, Kristyne M" sort="Wozney, Kristyne M" uniqKey="Wozney K" first="Kristyne M." last="Wozney">Kristyne M. Wozney</name></noRegion><name sortKey="Haxton, Tim J" sort="Haxton, Tim J" uniqKey="Haxton T" first="Tim J." last="Haxton">Tim J. Haxton</name><name sortKey="Kjartanson, Shawna" sort="Kjartanson, Shawna" uniqKey="Kjartanson S" first="Shawna" last="Kjartanson">Shawna Kjartanson</name><name sortKey="Wilson, Chris C" sort="Wilson, Chris C" uniqKey="Wilson C" first="Chris C." last="Wilson">Chris C. 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