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Stock enhancement and conservation culture of sturgeons: problems and prospects

Identifieur interne : 001008 ( Istex/Corpus ); précédent : 001007; suivant : 001009

Stock enhancement and conservation culture of sturgeons: problems and prospects

Auteurs : M. S. Chebanov ; E. V. Galich ; Y. N. Chmir

Source :

RBID : ISTEX:8122FBE34E311F9C5F06AE0835EF2328661ECA3B

Abstract

Stock enhancement is the main source of Acipenser gueldenstaedtii and A. stellatus recruitment in the Sea of Azov, where up to 30 million juveniles have been released in recent years. The hatchery production strategy aimed solely to produce and release the largest possible number of juveniles, utilizing only the most mature broodfish of the spring spawning run. Although monitoring of age, mass and physiological conditions of the broodstock during the period of hatchery breeding did not show significant changes, the spawning run was dramatically shortened from several months to just 15 days, and includes only fish with advanced gonadal maturity. Conservation of the Azov Sea species and their unique spawning ecotypes is currently supported by the Federal Living Gene Bank, which maintains over 9000 adults of eight endangered species. This paper summarizes the results of comparative analysis of biological characteristics such as growth, age of the first sexual maturation, relative fecundity, and morphological and physiological indices in wild and cultured specimens of different species and intraspecific groups of sturgeons. We conclude that there is a need for developing better hatchery technologies to maintain diversity of the stocks, through breeding protocols that maximize the genetic diversity of offspring based on evaluation of parentage and relatedness in farmed stocks by microsatellite loci.

Url:
DOI: 10.1111/j.0022-1112.2004.0559f.x

Links to Exploration step

ISTEX:8122FBE34E311F9C5F06AE0835EF2328661ECA3B

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<abstract lang="en">Stock enhancement is the main source of Acipenser gueldenstaedtii and A. stellatus recruitment in the Sea of Azov, where up to 30 million juveniles have been released in recent years. The hatchery production strategy aimed solely to produce and release the largest possible number of juveniles, utilizing only the most mature broodfish of the spring spawning run. Although monitoring of age, mass and physiological conditions of the broodstock during the period of hatchery breeding did not show significant changes, the spawning run was dramatically shortened from several months to just 15 days, and includes only fish with advanced gonadal maturity. Conservation of the Azov Sea species and their unique spawning ecotypes is currently supported by the Federal Living Gene Bank, which maintains over 9000 adults of eight endangered species. This paper summarizes the results of comparative analysis of biological characteristics such as growth, age of the first sexual maturation, relative fecundity, and morphological and physiological indices in wild and cultured specimens of different species and intraspecific groups of sturgeons. We conclude that there is a need for developing better hatchery technologies to maintain diversity of the stocks, through breeding protocols that maximize the genetic diversity of offspring based on evaluation of parentage and relatedness in farmed stocks by microsatellite loci.</abstract>
<relatedItem type="host">
<titleInfo>
<title>Journal of Fish Biology</title>
</titleInfo>
<genre type="journal">journal</genre>
<identifier type="ISSN">0022-1112</identifier>
<identifier type="eISSN">1095-8649</identifier>
<identifier type="DOI">10.1111/(ISSN)1095-8649</identifier>
<identifier type="PublisherID">JFB</identifier>
<part>
<date>2004</date>
<detail type="volume">
<caption>vol.</caption>
<number>65</number>
</detail>
<detail type="supplement">
<caption>Suppl. no.</caption>
<number>s1</number>
</detail>
<extent unit="pages">
<start>316</start>
<end>316</end>
<total>1</total>
</extent>
</part>
</relatedItem>
<identifier type="istex">8122FBE34E311F9C5F06AE0835EF2328661ECA3B</identifier>
<identifier type="DOI">10.1111/j.0022-1112.2004.0559f.x</identifier>
<identifier type="ArticleID">JFB559F</identifier>
<recordInfo>
<recordContentSource>WILEY</recordContentSource>
<recordOrigin>Blackwell Science Ltd</recordOrigin>
</recordInfo>
</mods>
</metadata>
<serie></serie>
</istex>
</record>

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