Management of the Lake Sturgeon Acipenser fulvescens population in the lower St Lawrence River (Québec, Canada) from the 1910s to the present
Identifieur interne : 000E86 ( Istex/Corpus ); précédent : 000E85; suivant : 000E87Management of the Lake Sturgeon Acipenser fulvescens population in the lower St Lawrence River (Québec, Canada) from the 1910s to the present
Auteurs : Y. Mailhot ; P. Dumont ; N. VachonSource :
- Journal of Applied Ichthyology [ 0175-8659 ] ; 2011-04.
Abstract
The main objective of this paper is to show that a well‐managed lake sturgeon Acipenser fulvescens population can support a high and sustainable commercial catch, even in the Great Lakes drainage where the species has nowadays become rare. In a 350‐km long un‐fragmented stretch of the lower St Lawrence River located between Montreal and downstream Quebec City, with declared annual catches of 150 tonnes, the lake sturgeon population was considered overexploited by a governmental scientific committee in 1987 on the basis of high annual mortality rates (17–25% for age groups 14–31), unbalanced age structure, deficit of reproductive potential and commercial catch yields well over 1.5 kg ka−1. A first management plan implemented in 1987 failed to reduce the catch and provide more protection to the spawning stock. During the 1990s, the declared catch of the 76 commercial fishermen kept increasing over 200 tonnes. The age at the recruitment of the 20‐cm‐mesh gill‐nets shifted towards older fish, indicating a decrease in the numbers of younger fish. In the population, sub‐adult abundance decreased by 60%, as well as the year‐class strength and the abundance of the females on the largest known spawning ground. In 2000, a stronger management plan was then enforced in order to adapt the total catch to the potential of the resource. The commercial catch was reduced by 60% in 3 years and an individual code‐bar plastic tag and a code‐bar weight declaration coupon were established to control its application. The fishing season was also shortened. Ten years later, we are confident in maintaining the actual commercial fishery because the commercial catch is now much lower (80 tonnes) and is more effectively controlled, the abundance of juvenile lake sturgeon increased throughout the St Lawrence River and the regular yearly production of cohorts has been demonstrated. Restrictive management measures, close supervision of landings combined with periodic monitoring of the population are key elements in managing this long‐lived species. We also emphasize the importance of preventing any further fragmentation of this portion of 350 km of fluvial habitat as well as to maintain habitat quality to ensure the sustainability of this fishery.
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DOI: 10.1111/j.1439-0426.2011.01727.x
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ISTEX:51D646B14D444AA4DFB2DAC440F2DF6F28DB8361Le document en format XML
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Mailhot</name><affiliation><mods:affiliation>Ministère des Ressources naturelles et de la Faune, Direction de l’expertise Énergie‐Faune‐Forêts‐Mines‐Territoire de la Mauricie et du Centre‐du‐Québec, rue Laviolette, Trois‐Rivières, Québec, Canada</mods:affiliation></affiliation></author><author><name sortKey="Dumont, P" sort="Dumont, P" uniqKey="Dumont P" first="P." last="Dumont">P. Dumont</name><affiliation><mods:affiliation>Ministère des Ressources naturelles et de la Faune du Québec, Place Charles‐LeMoyne, Longueuil, Québec, Canada</mods:affiliation></affiliation></author><author><name sortKey="Vachon, N" sort="Vachon, N" uniqKey="Vachon N" first="N." last="Vachon">N. 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In a 350‐km long un‐fragmented stretch of the lower St Lawrence River located between Montreal and downstream Quebec City, with declared annual catches of 150 tonnes, the lake sturgeon population was considered overexploited by a governmental scientific committee in 1987 on the basis of high annual mortality rates (17–25% for age groups 14–31), unbalanced age structure, deficit of reproductive potential and commercial catch yields well over 1.5 kg ka−1. A first management plan implemented in 1987 failed to reduce the catch and provide more protection to the spawning stock. During the 1990s, the declared catch of the 76 commercial fishermen kept increasing over 200 tonnes. The age at the recruitment of the 20‐cm‐mesh gill‐nets shifted towards older fish, indicating a decrease in the numbers of younger fish. In the population, sub‐adult abundance decreased by 60%, as well as the year‐class strength and the abundance of the females on the largest known spawning ground. In 2000, a stronger management plan was then enforced in order to adapt the total catch to the potential of the resource. The commercial catch was reduced by 60% in 3 years and an individual code‐bar plastic tag and a code‐bar weight declaration coupon were established to control its application. The fishing season was also shortened. Ten years later, we are confident in maintaining the actual commercial fishery because the commercial catch is now much lower (80 tonnes) and is more effectively controlled, the abundance of juvenile lake sturgeon increased throughout the St Lawrence River and the regular yearly production of cohorts has been demonstrated. Restrictive management measures, close supervision of landings combined with periodic monitoring of the population are key elements in managing this long‐lived species. 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In 2000, a stronger management plan was then enforced in order to adapt the total catch to the potential of the resource. The commercial catch was reduced by 60% in 3 years and an individual code‐bar plastic tag and a code‐bar weight declaration coupon were established to control its application. The fishing season was also shortened. Ten years later, we are confident in maintaining the actual commercial fishery because the commercial catch is now much lower (80 tonnes) and is more effectively controlled, the abundance of juvenile lake sturgeon increased throughout the St Lawrence River and the regular yearly production of cohorts has been demonstrated. Restrictive management measures, close supervision of landings combined with periodic monitoring of the population are key elements in managing this long‐lived species. 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In a 350‐km long un‐fragmented stretch of the lower St Lawrence River located between Montreal and downstream Quebec City, with declared annual catches of 150 tonnes, the lake sturgeon population was considered overexploited by a governmental scientific committee in 1987 on the basis of high annual mortality rates (17–25% for age groups 14–31), unbalanced age structure, deficit of reproductive potential and commercial catch yields well over 1.5 kg ka−1. A first management plan implemented in 1987 failed to reduce the catch and provide more protection to the spawning stock. During the 1990s, the declared catch of the 76 commercial fishermen kept increasing over 200 tonnes. The age at the recruitment of the 20‐cm‐mesh gill‐nets shifted towards older fish, indicating a decrease in the numbers of younger fish. In the population, sub‐adult abundance decreased by 60%, as well as the year‐class strength and the abundance of the females on the largest known spawning ground. In 2000, a stronger management plan was then enforced in order to adapt the total catch to the potential of the resource. The commercial catch was reduced by 60% in 3 years and an individual code‐bar plastic tag and a code‐bar weight declaration coupon were established to control its application. The fishing season was also shortened. Ten years later, we are confident in maintaining the actual commercial fishery because the commercial catch is now much lower (80 tonnes) and is more effectively controlled, the abundance of juvenile lake sturgeon increased throughout the St Lawrence River and the regular yearly production of cohorts has been demonstrated. Restrictive management measures, close supervision of landings combined with periodic monitoring of the population are key elements in managing this long‐lived species. 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Mailhot, P. Dumont and N. Vachon</title><title type="short">Management of the lower St Lawrence River Lake Sturgeon</title></titleGroup><creators><creator creatorRole="author" xml:id="cr1" affiliationRef="#a1"><personName><givenNames>Y.</givenNames><familyName>Mailhot</familyName></personName></creator><creator creatorRole="author" xml:id="cr2" affiliationRef="#a2"><personName><givenNames>P.</givenNames><familyName>Dumont</familyName></personName></creator><creator creatorRole="author" xml:id="cr3" affiliationRef="#a2"><personName><givenNames>N.</givenNames><familyName>Vachon</familyName></personName></creator></creators><affiliationGroup><affiliation xml:id="a1" countryCode="CA"><unparsedAffiliation>Ministère des Ressources naturelles et de la Faune, Direction de l’expertise Énergie‐Faune‐Forêts‐Mines‐Territoire de la Mauricie et du Centre‐du‐Québec, rue Laviolette, Trois‐Rivières, Québec, Canada</unparsedAffiliation></affiliation><affiliation xml:id="a2" countryCode="CA"><unparsedAffiliation>Ministère des Ressources naturelles et de la Faune du Québec, Place Charles‐LeMoyne, Longueuil, Québec, Canada</unparsedAffiliation></affiliation></affiliationGroup><abstractGroup><abstract type="main" xml:lang="en"><title type="main">Summary</title><p>The main objective of this paper is to show that a well‐managed lake sturgeon <i>Acipenser fulvescens</i> population can support a high and sustainable commercial catch, even in the Great Lakes drainage where the species has nowadays become rare. In a 350‐km long un‐fragmented stretch of the lower St Lawrence River located between Montreal and downstream Quebec City, with declared annual catches of 150 tonnes, the lake sturgeon population was considered overexploited by a governmental scientific committee in 1987 on the basis of high annual mortality rates (17–25% for age groups 14–31), unbalanced age structure, deficit of reproductive potential and commercial catch yields well over 1.5 kg ka<sup>−1</sup>. A first management plan implemented in 1987 failed to reduce the catch and provide more protection to the spawning stock. During the 1990s, the declared catch of the 76 commercial fishermen kept increasing over 200 tonnes. The age at the recruitment of the 20‐cm‐mesh gill‐nets shifted towards older fish, indicating a decrease in the numbers of younger fish. In the population, sub‐adult abundance decreased by 60%, as well as the year‐class strength and the abundance of the females on the largest known spawning ground. In 2000, a stronger management plan was then enforced in order to adapt the total catch to the potential of the resource. The commercial catch was reduced by 60% in 3 years and an individual code‐bar plastic tag and a code‐bar weight declaration coupon were established to control its application. The fishing season was also shortened. Ten years later, we are confident in maintaining the actual commercial fishery because the commercial catch is now much lower (80 tonnes) and is more effectively controlled, the abundance of juvenile lake sturgeon increased throughout the St Lawrence River and the regular yearly production of cohorts has been demonstrated. Restrictive management measures, close supervision of landings combined with periodic monitoring of the population are key elements in managing this long‐lived species. We also emphasize the importance of preventing any further fragmentation of this portion of 350 km of fluvial habitat as well as to maintain habitat quality to ensure the sustainability of this fishery.</p></abstract></abstractGroup></contentMeta></header></component></istex:document></istex:metadataXml><mods version="3.6"><titleInfo lang="en"><title>Management of the Lake Sturgeon Acipenser fulvescens population in the lower St Lawrence River (Québec, Canada) from the 1910s to the present</title></titleInfo><titleInfo type="abbreviated" lang="en"><title>Management of the lower St Lawrence River Lake Sturgeon</title></titleInfo><titleInfo type="alternative" contentType="CDATA" lang="en"><title>Management of the Lake Sturgeon Acipenser fulvescens population in the lower St Lawrence River (Québec, Canada) from the 1910s to the present</title></titleInfo><name type="personal"><namePart type="given">Y.</namePart><namePart type="family">Mailhot</namePart><affiliation>Ministère des Ressources naturelles et de la Faune, Direction de l’expertise Énergie‐Faune‐Forêts‐Mines‐Territoire de la Mauricie et du Centre‐du‐Québec, rue Laviolette, Trois‐Rivières, Québec, Canada</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">P.</namePart><namePart type="family">Dumont</namePart><affiliation>Ministère des Ressources naturelles et de la Faune du Québec, Place Charles‐LeMoyne, Longueuil, Québec, Canada</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">N.</namePart><namePart type="family">Vachon</namePart><affiliation>Ministère des Ressources naturelles et de la Faune du Québec, Place Charles‐LeMoyne, Longueuil, Québec, Canada</affiliation><role><roleTerm type="text">author</roleTerm></role></name><typeOfResource>text</typeOfResource><genre type="article" displayLabel="article"></genre><originInfo><publisher>Blackwell Publishing Ltd</publisher><place><placeTerm type="text">Oxford, UK</placeTerm></place><dateIssued encoding="w3cdtf">2011-04</dateIssued><edition>Received: August 12, 2010 Accepted: January 25, 2011</edition><copyrightDate encoding="w3cdtf">2011</copyrightDate></originInfo><language><languageTerm type="code" authority="rfc3066">en</languageTerm><languageTerm type="code" authority="iso639-2b">eng</languageTerm></language><physicalDescription><internetMediaType>text/html</internetMediaType><extent unit="figures">4</extent><extent unit="tables">1</extent></physicalDescription><abstract lang="en">The main objective of this paper is to show that a well‐managed lake sturgeon Acipenser fulvescens population can support a high and sustainable commercial catch, even in the Great Lakes drainage where the species has nowadays become rare. In a 350‐km long un‐fragmented stretch of the lower St Lawrence River located between Montreal and downstream Quebec City, with declared annual catches of 150 tonnes, the lake sturgeon population was considered overexploited by a governmental scientific committee in 1987 on the basis of high annual mortality rates (17–25% for age groups 14–31), unbalanced age structure, deficit of reproductive potential and commercial catch yields well over 1.5 kg ka−1. A first management plan implemented in 1987 failed to reduce the catch and provide more protection to the spawning stock. During the 1990s, the declared catch of the 76 commercial fishermen kept increasing over 200 tonnes. The age at the recruitment of the 20‐cm‐mesh gill‐nets shifted towards older fish, indicating a decrease in the numbers of younger fish. In the population, sub‐adult abundance decreased by 60%, as well as the year‐class strength and the abundance of the females on the largest known spawning ground. In 2000, a stronger management plan was then enforced in order to adapt the total catch to the potential of the resource. The commercial catch was reduced by 60% in 3 years and an individual code‐bar plastic tag and a code‐bar weight declaration coupon were established to control its application. The fishing season was also shortened. Ten years later, we are confident in maintaining the actual commercial fishery because the commercial catch is now much lower (80 tonnes) and is more effectively controlled, the abundance of juvenile lake sturgeon increased throughout the St Lawrence River and the regular yearly production of cohorts has been demonstrated. Restrictive management measures, close supervision of landings combined with periodic monitoring of the population are key elements in managing this long‐lived species. We also emphasize the importance of preventing any further fragmentation of this portion of 350 km of fluvial habitat as well as to maintain habitat quality to ensure the sustainability of this fishery.</abstract><relatedItem type="host"><titleInfo><title>Journal of Applied Ichthyology</title></titleInfo><genre type="journal">journal</genre><identifier type="ISSN">0175-8659</identifier><identifier type="eISSN">1439-0426</identifier><identifier type="DOI">10.1111/(ISSN)1439-0426</identifier><identifier type="PublisherID">JAI</identifier><part><date>2011</date><detail type="title"><title>Proceedings of the 6th International Symposium on Sturgeon Wuhan, China October 25‐31, 2009</title></detail><detail type="volume"><caption>vol.</caption><number>27</number></detail><detail type="issue"><caption>no.</caption><number>2</number></detail><extent unit="pages"><start>405</start><end>410</end><total>6</total></extent></part></relatedItem><identifier type="istex">51D646B14D444AA4DFB2DAC440F2DF6F28DB8361</identifier><identifier type="DOI">10.1111/j.1439-0426.2011.01727.x</identifier><identifier type="ArticleID">JAI1727</identifier><accessCondition type="use and reproduction" contentType="copyright">© 2011 Blackwell Verlag, Berlin</accessCondition><recordInfo><recordContentSource>WILEY</recordContentSource><recordOrigin>Blackwell Publishing Ltd</recordOrigin></recordInfo></mods></metadata><serie></serie></istex></record>Pour manipuler ce document sous Unix (Dilib)
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