Assessment of natal origin of pike (Esox lucius) in the Baltic Sea using Sr:Ca in otoliths
Identifieur interne : 000497 ( Main/Exploration ); précédent : 000496; suivant : 000498Assessment of natal origin of pike (Esox lucius) in the Baltic Sea using Sr:Ca in otoliths
Auteurs : Olof Engstedt [Suède] ; Patrik Stenroth [Suède] ; Per Larsson [Suède] ; Lars Ljunggren [Suède] ; Mikael Elfman [Suède]Source :
- Environmental biology of fishes [ 0378-1909 ] ; 2010.
Descripteurs français
- Pascal (Inist)
- Wicri :
- topic : Mer Baltique, Milieu marin.
English descriptors
- KwdEn :
Abstract
Spawning habitat of pike (Esox lucius) in the Baltic Sea include brackish water bays, brooks and rivers. Elevated salinity concentrations are one of several stressors that might increase the use and importance of freshwater habitats for spawning. In the Baltic Sea, one of the largest brackish seas in the world, freshwater species like pike, perch (Perca fluviatilis), whitefish (Coregonus sp), bream (Abramis brama), ide (Leuciscus idus), roach (Rutilus rutilus) and burbot (Lota lota) all undertake spawning migrations to freshwater. However, over the last decades populations densities of these species have declined, and recruitment failure has been argued to be at least part of the problem. The importance of brooks and rivers as spawning areas for these species have not been quantified and set in relation to spawning success in brackish bays. In this study, we collected 175 adult pike (Esox lucius) on their foraging grounds in the sea. Fish were collected in two regions on the Baltic coast, more than 600 km apart. Subsequently we determined their origin (freshwater or marine) using otolith chemistry. Sagittal otoliths were analysed for strontium using the PIXE-method. The results show that 80 of the 175 pike were recruited in freshwater, and several of the larger specimens showed reoccurring migration behaviour. Data show that freshwater is an important recruitment habitat for Baltic Sea pike, suggesting that habitat improvements in rivers entering the Baltic Sea might significantly contribute to population restoration.
Affiliations:
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aut.</sZ></inist:fA14><country>Suède</country><wicri:noRegion>39182 Kalmar</wicri:noRegion></affiliation></author><author><name sortKey="Larsson, Per" sort="Larsson, Per" uniqKey="Larsson P" first="Per" last="Larsson">Per Larsson</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>School of Pure and Applied Natural Sciences, University of Kalmar</s1><s2>39182 Kalmar</s2><s3>SWE</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ></inist:fA14><country>Suède</country><wicri:noRegion>39182 Kalmar</wicri:noRegion></affiliation></author><author><name sortKey="Ljunggren, Lars" sort="Ljunggren, Lars" uniqKey="Ljunggren L" first="Lars" last="Ljunggren">Lars Ljunggren</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Institute of Coastal Research, National Board of Fisheries, Box 109</s1><s2>74071 Öregrund</s2><s3>SWE</s3><sZ>4 aut.</sZ></inist:fA14><country>Suède</country><wicri:noRegion>74071 Öregrund</wicri:noRegion></affiliation></author><author><name sortKey="Elfman, Mikael" sort="Elfman, Mikael" uniqKey="Elfman M" first="Mikael" last="Elfman">Mikael Elfman</name><affiliation wicri:level="1"><inist:fA14 i1="03"><s1>Department of Nuclear Physics, Lund Institute of Technology</s1><s2>223 62 Lund</s2><s3>SWE</s3><sZ>5 aut.</sZ></inist:fA14><country>Suède</country><wicri:noRegion>223 62 Lund</wicri:noRegion></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">INIST</idno><idno type="inist">11-0011633</idno><date when="2010">2010</date><idno type="stanalyst">PASCAL 11-0011633 INIST</idno><idno type="RBID">Pascal:11-0011633</idno><idno type="wicri:Area/PascalFrancis/Corpus">000029</idno><idno type="wicri:Area/PascalFrancis/Curation">000089</idno><idno type="wicri:Area/PascalFrancis/Checkpoint">000032</idno><idno type="wicri:explorRef" wicri:stream="PascalFrancis" wicri:step="Checkpoint">000032</idno><idno type="wicri:doubleKey">0378-1909:2010:Engstedt O:assessment:of:natal</idno><idno type="wicri:Area/Main/Merge">000503</idno><idno 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Kalmar</s2><s3>SWE</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ></inist:fA14><country>Suède</country><wicri:noRegion>39182 Kalmar</wicri:noRegion></affiliation></author><author><name sortKey="Larsson, Per" sort="Larsson, Per" uniqKey="Larsson P" first="Per" last="Larsson">Per Larsson</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>School of Pure and Applied Natural Sciences, University of Kalmar</s1><s2>39182 Kalmar</s2><s3>SWE</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ></inist:fA14><country>Suède</country><wicri:noRegion>39182 Kalmar</wicri:noRegion></affiliation></author><author><name sortKey="Ljunggren, Lars" sort="Ljunggren, Lars" uniqKey="Ljunggren L" first="Lars" last="Ljunggren">Lars Ljunggren</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Institute of Coastal Research, National Board of Fisheries, Box 109</s1><s2>74071 Öregrund</s2><s3>SWE</s3><sZ>4 aut.</sZ></inist:fA14><country>Suède</country><wicri:noRegion>74071 Öregrund</wicri:noRegion></affiliation></author><author><name sortKey="Elfman, Mikael" sort="Elfman, Mikael" uniqKey="Elfman M" first="Mikael" last="Elfman">Mikael Elfman</name><affiliation wicri:level="1"><inist:fA14 i1="03"><s1>Department of Nuclear Physics, Lund Institute of Technology</s1><s2>223 62 Lund</s2><s3>SWE</s3><sZ>5 aut.</sZ></inist:fA14><country>Suède</country><wicri:noRegion>223 62 Lund</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="2010">2010</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>Anadromy</term><term>Baltic Sea</term><term>Esox lucius</term><term>Freshwater environment</term><term>Geographical origin</term><term>Marine environment</term><term>Otolith</term><term>Pisces</term><term>Strontium</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Origine géographique</term><term>Mer Baltique</term><term>Otolithe</term><term>Strontium</term><term>Anadromie</term><term>Pisces</term><term>Milieu eau douce</term><term>Milieu marin</term><term>Esox lucius</term></keywords><keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Mer Baltique</term><term>Milieu marin</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Spawning habitat of pike (Esox lucius) in the Baltic Sea include brackish water bays, brooks and rivers. Elevated salinity concentrations are one of several stressors that might increase the use and importance of freshwater habitats for spawning. In the Baltic Sea, one of the largest brackish seas in the world, freshwater species like pike, perch (Perca fluviatilis), whitefish (Coregonus sp), bream (Abramis brama), ide (Leuciscus idus), roach (Rutilus rutilus) and burbot (Lota lota) all undertake spawning migrations to freshwater. However, over the last decades populations densities of these species have declined, and recruitment failure has been argued to be at least part of the problem. The importance of brooks and rivers as spawning areas for these species have not been quantified and set in relation to spawning success in brackish bays. In this study, we collected 175 adult pike (Esox lucius) on their foraging grounds in the sea. Fish were collected in two regions on the Baltic coast, more than 600 km apart. Subsequently we determined their origin (freshwater or marine) using otolith chemistry. Sagittal otoliths were analysed for strontium using the PIXE-method. The results show that 80 of the 175 pike were recruited in freshwater, and several of the larger specimens showed reoccurring migration behaviour. Data show that freshwater is an important recruitment habitat for Baltic Sea pike, suggesting that habitat improvements in rivers entering the Baltic Sea might significantly contribute to population restoration.</div></front></TEI><affiliations><list><country><li>Suède</li></country></list><tree><country name="Suède"><noRegion><name sortKey="Engstedt, Olof" sort="Engstedt, Olof" uniqKey="Engstedt O" first="Olof" last="Engstedt">Olof Engstedt</name></noRegion><name sortKey="Elfman, Mikael" sort="Elfman, Mikael" uniqKey="Elfman M" first="Mikael" last="Elfman">Mikael Elfman</name><name sortKey="Larsson, Per" sort="Larsson, Per" uniqKey="Larsson P" first="Per" last="Larsson">Per Larsson</name><name sortKey="Ljunggren, Lars" sort="Ljunggren, Lars" uniqKey="Ljunggren L" first="Lars" last="Ljunggren">Lars Ljunggren</name><name sortKey="Stenroth, Patrik" sort="Stenroth, Patrik" uniqKey="Stenroth P" first="Patrik" last="Stenroth">Patrik Stenroth</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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