AustralieFrV1, Main, Exploration, bibRecord, 004077

Large-scale distribution of three deep-water squaloid sharks: Integrating data on sex, maturity and environment

Identifieur interne : 004077 ( Main/Exploration ); précédent : 004076; suivant : 004078

Large-scale distribution of three deep-water squaloid sharks: Integrating data on sex, maturity and environment

Auteurs : Teresa Moura [Portugal] ; Emma Jones [Nouvelle-Zélande] ; Maurice W. Clarke [Irlande (pays)] ; Charles F. Cotton [États-Unis] ; Paul Crozier [Nouvelle-Zélande] ; Ross K. Daley [Australie] ; Guzman Diez [Espagne] ; Helen Dobby [Royaume-Uni] ; Jan E. Dyb [Norvège] ; Inge Fossen [Norvège] ; Sarah B. Irvine [Australie] ; Klara Jakobsdottir [Islande] ; Luis J. Lopez-Abellan [Espagne] ; Pascal Lorance [France] ; Pedro Pascual-Alayon [Espagne] ; Ricardo B. Severino [Portugal] ; Ivone Figueiredo [Portugal]

Source :

Fisheries research [ 0165-7836 ] ; 2014.

RBID : Pascal:14-0174382

Descripteurs français

Pascal (Inist)
- Echelle grande, Répartition spatiale, Eau profonde, Sexe, Maturité, Environnement, Pêcherie, Stade développement, Structure population, Chondrichthyes.

English descriptors

KwdEn :
- Chondrichthyes, Deep water, Developmental stage, Environment, Fishery, Large scale, Maturity, Population structure, Sex, Spatial distribution.

Abstract

Deep-water sharks exhibit species-specific reproductive strategies, which include segregation by sex, size and reproductive stage. However, due to the wide spatial distribution of most species, available information, usually collected at a regional scale, is usually not adequate to infer species reproductive spatial dynamics. This study draws together information on the distribution of reproductive stages of three species of squaliform sharks: Portuguese dogfish Centroscymnus coelolepis (Somniosidae), leafscale gulper shark Centrophorus squamosus (Centrophoridae) and birdbeak dogfish Deania calcea (Centrophoridae), gathering data from several geographical areas from the Atlantic, Indian and Pacific Oceans. For each species we analysed the sex ratio and the spatial patterns of reproductive stages within regions, considering the influence of geographical area, depth, season, temperature and salinity. The combination of statistical methods used in this study successfully identified a number of life history patterns which reflect different use of habitats by sex and life cycle stage. Pregnant females of the three species are spatially segregated, inhabiting shallower and/or warmer waters. In the case of the leafscale gulper shark this segregation might be associated with large scale migrations. In contrast, in Portuguese dogfish all adult maturity stages occur in the same geographical area. Pregnant female birdbeak dogfish were rare in all samples. Larger immature specimens of all the three species distribute deeper than the remaining maturity stages in most of the regions analysed. Mature males of leafscale gulper shark and birdbeak dogfish were more broadly distributed than mature females, supporting the possibility of sex-biased dispersal. Neonates and small sized specimens were scarce in the Northeast Atlantic potentially explained by their concentration in nurseries, and/or by gear selectivity. Management measures will benefit from considering the geographic scale of demographic variation between species. However, standardized collaborative approaches will be needed for comprehensive assessment.

Affiliations:

Australie, Espagne, France, Irlande (pays), Islande, Norvège, Nouvelle-Zélande, Portugal, Royaume-Uni, États-Unis
Canaries

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Le document en format XML

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<sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">Large-scale distribution of three deep-water squaloid sharks: Integrating data on sex, maturity and environment</title>
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</placeName>
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<affiliation wicri:level="1"><inist:fA14 i1="13"><s1>IFREMER, rue de L'Ile d'Yeu, BP 21105</s1>
<s2>44311 Nantes</s2>
<s3>FRA</s3>
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</inist:fA14>
<country>France</country>
<wicri:noRegion>44311 Nantes</wicri:noRegion>
<wicri:noRegion>21105</wicri:noRegion>
<wicri:noRegion>44311 Nantes</wicri:noRegion>
</affiliation>
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<author><name sortKey="Pascual Alayon, Pedro" sort="Pascual Alayon, Pedro" uniqKey="Pascual Alayon P" first="Pedro" last="Pascual-Alayon">Pedro Pascual-Alayon</name>
<affiliation wicri:level="2"><inist:fA14 i1="12"><s1>Centro Oceanográfico de Canarias, Instituto Español de Oceanografía. Via Espaldón Dársena Pesquera Pcl. 8</s1>
<s2>38180 Santa Cruz de Tenerife</s2>
<s3>ESP</s3>
<sZ>13 aut.</sZ>
<sZ>15 aut.</sZ>
</inist:fA14>
<country>Espagne</country>
<placeName><region nuts="2" type="communauté">Canaries</region>
</placeName>
</affiliation>
</author>
<author><name sortKey="Severino, Ricardo B" sort="Severino, Ricardo B" uniqKey="Severino R" first="Ricardo B." last="Severino">Ricardo B. Severino</name>
<affiliation wicri:level="1"><inist:fA14 i1="14"><s1>CIMAR Laboratório Associado/CIIMAR, Centro de Investigaçâo Marinha e Ambiental. Universidade do Porto, Rua dos Bragas, 289</s1>
<s2>4050-123 Porto</s2>
<s3>PRT</s3>
<sZ>16 aut.</sZ>
</inist:fA14>
<country>Portugal</country>
<wicri:noRegion>4050-123 Porto</wicri:noRegion>
</affiliation>
</author>
<author><name sortKey="Figueiredo, Ivone" sort="Figueiredo, Ivone" uniqKey="Figueiredo I" first="Ivone" last="Figueiredo">Ivone Figueiredo</name>
<affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Divisão de Modelação e Gestãode Recursos da Pesca, Instituto Português do Mar e da Atmosfera, Av</s1>
<s2>Brasilia, 1449-006 Lisbon</s2>
<s3>PRT</s3>
<sZ>1 aut.</sZ>
<sZ>17 aut.</sZ>
</inist:fA14>
<country>Portugal</country>
<wicri:noRegion>Brasilia, 1449-006 Lisbon</wicri:noRegion>
</affiliation>
</author>
</analytic>
<series><title level="j" type="main">Fisheries research</title>
<title level="j" type="abbreviated">Fish. res.</title>
<idno type="ISSN">0165-7836</idno>
<imprint><date when="2014">2014</date>
</imprint>
</series>
</biblStruct>
</sourceDesc>
<seriesStmt><title level="j" type="main">Fisheries research</title>
<title level="j" type="abbreviated">Fish. res.</title>
<idno type="ISSN">0165-7836</idno>
</seriesStmt>
</fileDesc>
<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Chondrichthyes</term>
<term>Deep water</term>
<term>Developmental stage</term>
<term>Environment</term>
<term>Fishery</term>
<term>Large scale</term>
<term>Maturity</term>
<term>Population structure</term>
<term>Sex</term>
<term>Spatial distribution</term>
</keywords>
<keywords scheme="Pascal" xml:lang="fr"><term>Echelle grande</term>
<term>Répartition spatiale</term>
<term>Eau profonde</term>
<term>Sexe</term>
<term>Maturité</term>
<term>Environnement</term>
<term>Pêcherie</term>
<term>Stade développement</term>
<term>Structure population</term>
<term>Chondrichthyes</term>
</keywords>
</textClass>
</profileDesc>
</teiHeader>
<front><div type="abstract" xml:lang="en">Deep-water sharks exhibit species-specific reproductive strategies, which include segregation by sex, size and reproductive stage. However, due to the wide spatial distribution of most species, available information, usually collected at a regional scale, is usually not adequate to infer species reproductive spatial dynamics. This study draws together information on the distribution of reproductive stages of three species of squaliform sharks: Portuguese dogfish Centroscymnus coelolepis (Somniosidae), leafscale gulper shark Centrophorus squamosus (Centrophoridae) and birdbeak dogfish Deania calcea (Centrophoridae), gathering data from several geographical areas from the Atlantic, Indian and Pacific Oceans. For each species we analysed the sex ratio and the spatial patterns of reproductive stages within regions, considering the influence of geographical area, depth, season, temperature and salinity. The combination of statistical methods used in this study successfully identified a number of life history patterns which reflect different use of habitats by sex and life cycle stage. Pregnant females of the three species are spatially segregated, inhabiting shallower and/or warmer waters. In the case of the leafscale gulper shark this segregation might be associated with large scale migrations. In contrast, in Portuguese dogfish all adult maturity stages occur in the same geographical area. Pregnant female birdbeak dogfish were rare in all samples. Larger immature specimens of all the three species distribute deeper than the remaining maturity stages in most of the regions analysed. Mature males of leafscale gulper shark and birdbeak dogfish were more broadly distributed than mature females, supporting the possibility of sex-biased dispersal. Neonates and small sized specimens were scarce in the Northeast Atlantic potentially explained by their concentration in nurseries, and/or by gear selectivity. Management measures will benefit from considering the geographic scale of demographic variation between species. However, standardized collaborative approaches will be needed for comprehensive assessment.</div>
</front>
</TEI>
<affiliations><list><country><li>Australie</li>
<li>Espagne</li>
<li>France</li>
<li>Irlande (pays)</li>
<li>Islande</li>
<li>Norvège</li>
<li>Nouvelle-Zélande</li>
<li>Portugal</li>
<li>Royaume-Uni</li>
<li>États-Unis</li>
</country>
<region><li>Canaries</li>
</region>
</list>
<tree><country name="Portugal"><noRegion><name sortKey="Moura, Teresa" sort="Moura, Teresa" uniqKey="Moura T" first="Teresa" last="Moura">Teresa Moura</name>
</noRegion>
<name sortKey="Figueiredo, Ivone" sort="Figueiredo, Ivone" uniqKey="Figueiredo I" first="Ivone" last="Figueiredo">Ivone Figueiredo</name>
<name sortKey="Severino, Ricardo B" sort="Severino, Ricardo B" uniqKey="Severino R" first="Ricardo B." last="Severino">Ricardo B. Severino</name>
</country>
<country name="Nouvelle-Zélande"><noRegion><name sortKey="Jones, Emma" sort="Jones, Emma" uniqKey="Jones E" first="Emma" last="Jones">Emma Jones</name>
</noRegion>
<name sortKey="Crozier, Paul" sort="Crozier, Paul" uniqKey="Crozier P" first="Paul" last="Crozier">Paul Crozier</name>
</country>
<country name="Irlande (pays)"><noRegion><name sortKey="Clarke, Maurice W" sort="Clarke, Maurice W" uniqKey="Clarke M" first="Maurice W." last="Clarke">Maurice W. Clarke</name>
</noRegion>
</country>
<country name="États-Unis"><noRegion><name sortKey="Cotton, Charles F" sort="Cotton, Charles F" uniqKey="Cotton C" first="Charles F." last="Cotton">Charles F. Cotton</name>
</noRegion>
</country>
<country name="Australie"><noRegion><name sortKey="Daley, Ross K" sort="Daley, Ross K" uniqKey="Daley R" first="Ross K." last="Daley">Ross K. Daley</name>
</noRegion>
<name sortKey="Irvine, Sarah B" sort="Irvine, Sarah B" uniqKey="Irvine S" first="Sarah B." last="Irvine">Sarah B. Irvine</name>
</country>
<country name="Espagne"><noRegion><name sortKey="Diez, Guzman" sort="Diez, Guzman" uniqKey="Diez G" first="Guzman" last="Diez">Guzman Diez</name>
</noRegion>
<name sortKey="Lopez Abellan, Luis J" sort="Lopez Abellan, Luis J" uniqKey="Lopez Abellan L" first="Luis J." last="Lopez-Abellan">Luis J. Lopez-Abellan</name>
<name sortKey="Pascual Alayon, Pedro" sort="Pascual Alayon, Pedro" uniqKey="Pascual Alayon P" first="Pedro" last="Pascual-Alayon">Pedro Pascual-Alayon</name>
</country>
<country name="Royaume-Uni"><noRegion><name sortKey="Dobby, Helen" sort="Dobby, Helen" uniqKey="Dobby H" first="Helen" last="Dobby">Helen Dobby</name>
</noRegion>
</country>
<country name="Norvège"><noRegion><name sortKey="Dyb, Jan E" sort="Dyb, Jan E" uniqKey="Dyb J" first="Jan E." last="Dyb">Jan E. Dyb</name>
</noRegion>
<name sortKey="Fossen, Inge" sort="Fossen, Inge" uniqKey="Fossen I" first="Inge" last="Fossen">Inge Fossen</name>
</country>
<country name="Islande"><noRegion><name sortKey="Jakobsdottir, Klara" sort="Jakobsdottir, Klara" uniqKey="Jakobsdottir K" first="Klara" last="Jakobsdottir">Klara Jakobsdottir</name>
</noRegion>
</country>
<country name="France"><noRegion><name sortKey="Lorance, Pascal" sort="Lorance, Pascal" uniqKey="Lorance P" first="Pascal" last="Lorance">Pascal Lorance</name>
</noRegion>
</country>
</tree>
</affiliations>
</record>

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Large-scale distribution of three deep-water squaloid sharks: Integrating data on sex, maturity and environment

Large-scale distribution of three deep-water squaloid sharks: Integrating data on sex, maturity and environment

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