Present State and Perspectives of Stellate Sturgeon Brood Fish in the Romanian Part of the Danube
Identifieur interne : 000289 ( Istex/Curation ); précédent : 000288; suivant : 000290Present State and Perspectives of Stellate Sturgeon Brood Fish in the Romanian Part of the Danube
Auteurs : Cornel Ceapa [Roumanie] ; Patrick Williot [France] ; Nicolae Bacalbasa-Dobrovici [Roumanie]Source :
- International Review of Hydrobiology [ 1434-2944 ] ; 2002-11.
English descriptors
Abstract
This paper is presenting the results of a four years biometry study on the stellate sturgeon (Acipenser stellatus) brood fish in the Danube River. We calculated the growth rate, the length‐weight relationships and the age composition for the two sexes of the brood fish during the reproduction migration. Comparing with the age frequencies for the 1965–1968 period we noticed an appreciable shift in the proportion of the age classes toward the youngest ones and a rejuvenation of the population (average age of 7.2 years for the males and 10.9 years for the females). The average total length for the 1997–2000 period (mean TL = 119,73 cm) is much smaller compared to the 30 years earlier value (mean TL = 131.16 cm). The maximum frequency age class was the 7th years class for the males and the 8th and 11th for the females. These data are a classical expression of overfishing.
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DOI: 10.1002/1522-2632(200211)87:5/6<507::AID-IROH507>3.0.CO;2-W
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last="Williot">Patrick Williot</name><affiliation wicri:level="1"><mods:affiliation>Cemagref, Division Ressources Aquatiques Continentales, 50 Avenue de Verdun, 33612 Cestas Cedex, France</mods:affiliation><country xml:lang="fr">France</country><wicri:regionArea>Cemagref, Division Ressources Aquatiques Continentales, 50 Avenue de Verdun, 33612 Cestas Cedex</wicri:regionArea></affiliation></author><author><name sortKey="Bacalbasa Obrovici, Nicolae" sort="Bacalbasa Obrovici, Nicolae" uniqKey="Bacalbasa Obrovici N" first="Nicolae" last="Bacalbasa-Dobrovici">Nicolae Bacalbasa-Dobrovici</name><affiliation wicri:level="1"><mods:affiliation>“Dunarea de Jos” University of Galat�i, Fishing and Aquaculture Department, 47 Domneascã Str., RO‐6200 Galati, Romania</mods:affiliation><country xml:lang="fr">Roumanie</country><wicri:regionArea>“Dunarea de Jos” University of Galat�i, Fishing and Aquaculture Department, 47 Domneascã Str., RO‐6200 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type="published" when="2002-11">2002-11</date><biblScope unit="volume">87</biblScope><biblScope unit="issue">5‐6</biblScope><biblScope unit="page" from="507">507</biblScope><biblScope unit="page" to="513">513</biblScope></imprint><idno type="ISSN">1434-2944</idno></series><idno type="istex">85759EF4C89F15AAC92C1E346C6D9CDCF2198FAA</idno><idno type="DOI">10.1002/1522-2632(200211)87:5/6<507::AID-IROH507>3.0.CO;2-W</idno><idno type="ArticleID">IROH507</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">1434-2944</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Danube</term><term>age composition</term><term>brood fish</term><term>growth parameters</term><term>overfishing</term><term>stellate sturgeon</term></keywords></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">This paper is presenting the results of a four years biometry study on the stellate sturgeon (Acipenser stellatus) brood fish in the Danube River. We calculated the growth rate, the length‐weight relationships and the age composition for the two sexes of the brood fish during the reproduction migration. Comparing with the age frequencies for the 1965–1968 period we noticed an appreciable shift in the proportion of the age classes toward the youngest ones and a rejuvenation of the population (average age of 7.2 years for the males and 10.9 years for the females). The average total length for the 1997–2000 period (mean TL = 119,73 cm) is much smaller compared to the 30 years earlier value (mean TL = 131.16 cm). The maximum frequency age class was the 7th years class for the males and the 8th and 11th for the females. These data are a classical expression of overfishing.</div></front></TEI></record>Pour manipuler ce document sous Unix (Dilib)
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