Threatened fishes of the world:Acipenser sturio Linnaeus, 1758 (Acipenseridae)

Lepage, Mario; Rochard, E.

doi:10.1007/bf00001813

Cited by 30 publications

(18 citation statements)

References 1 publication

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“…In the Gironde area, the colonisation of non-indigenous species (Acartia tonsa, David et al 2007) and the important decrease in abundance of charismatic species such as the European sturgeon Acipenser sturio (Lepage & Rochard 1995) or smelt Osmerus eperlanus (Pronier & Rochard 1998) are notable examples of deep impacts on biological communities by large natural modifications or anthropogenic disturbances. In the Gironde, the main human-induced impacts are fisheries, damages to estuarine habitats, and thermal and physical impacts (impingement) of the nuclear power station.…”

Section: Management Issuesmentioning

confidence: 99%

Diversity and stability of an estuarine trophic network

Lobry¹,

David²,

Pasquaud³

et al. 2008

Mar. Ecol. Prog. Ser.

107

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Section: Management Issuesmentioning

confidence: 99%

Diversity and stability of an estuarine trophic network

Lobry¹,

David²,

Pasquaud³

et al. 2008

Mar. Ecol. Prog. Ser.

107

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“…Many species benefit from specific conservation measures, such as habitat restoration and protection, fishing regulations, and specific targeted stocking practices (Waldman and Wirgin 1998;Jackson et al 2002;Arlati and Poliakova 2009;Maltsev 2009;Williot et al 2009). The European sturgeon, Acipenser sturio (Linnaeus, 1758) is a critically endangered migratory species (Lepage and Rochard 1995;Lassalle et al 2010;Chassaing et al 2016) which is currently the subject of a European recovery plan (Rosenthal et al 2007), along with national action plans in France (MEDDTL 2011) and in Germany . The species has a complex life cycle involving migration periods associated with habitat shifts (Castelnaud et al 1991;Rochard et al 2001;Acolas et al 2011aAcolas et al , 2012.…”

Section: Introductionmentioning

confidence: 99%

European sturgeon (Acipenser sturio L.) young of the year performance in different rearing environments –study within a stocking program

2016

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The European sturgeon is critically endangered and the French ex-situ conservation approach involves developing a captive stock to produce offspring for release to boost natural populations. The purpose of our study was to assess the effects of rearing environment before stocking on the survival, growth, and behavior of threemonth-old sturgeons from two different crossings. Enriched rearing was designed to mimic the variability of the natural environment using river water, natural photoperiod, substrate, variable water current and depths. Traditional rearing was carried out with bare tanks, underground water, dark conditions, without current and at constant depth. Fish survival was determined monthly and growth was estimated weekly. Behavior was assessed with exploration and novel prey tests in solitary using video tracking. Results demonstrated that enriched condition resulted in bigger fish from the first month. Growth curve analysis revealed that enriched environment made both fish crossings grow in a similar manner. In contrast, crossings growth differed in traditional rearing which may reflect a genotype-environment interaction. Behavioral data highlighted that enriched-reared fish were slower to explore a new environment but more individuals engaged on doing so than traditional-reared fish. Results also showed that survival was high (>80 %) during all the trial. However, survival was lower during the second month in enriched environment. Our findings advocate for the integration of enriched rearing practices within the juvenile production for release in order to boost the performance linked to fitness. Stocking practices and life history research must work together to favor adaptive aquaculture approaches, which support species conservation.

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“…The European sturgeon (Acipenser sturio) was historically widely distributed in Europe, but is extirpated in its historic range, apart from a relict population in the Gironde, France (Lepage and Rochard 1995). Traditionally, the now extinct Baltic sturgeon population had been classified as "European sturgeon" (Billard and Lecointre 2001).…”

Section: Introductionmentioning

confidence: 99%

Atlantic sturgeons (Acipenser sturio, Acipenser oxyrinchus): American females successful in Europe

Tiedemann

Moll

Paulus

et al. 2006

Naturwissenschaften

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Recent molecular data on the maternally inherited mitochondrial (mt) DNA have challenged the traditional view that the now extinct Baltic sturgeon population belonged to the European sturgeon Acipenser sturio. Instead, there is evidence that American sea sturgeon Acipenser oxyrinchus historically immigrated into the Baltic Sea. In this study, we test the hypothesis that A. oxyrinchus introgressed into, rather than replaced, the A. sturio population in the Baltic. We established four single nucleotide polymorphisms (SNPs) in the nuclear MHC II antigen gene with a species-specific SNP pattern. Using an ancient DNA approach and two independent lines of molecular evidence (sequencing of allele-specific clones, SNaPshot), we detected both A. sturio and A. oxyrinchus alleles in the available museum material of the now extinct Baltic sturgeon population. The hybrid nature of the Baltic population was further confirmed by very high levels of heterozygosity. It had been previously postulated that the immigration of the cold-adapted A. oxyrinchus into the Baltic occurred during the Medieval Little Ice Age, when temperature likely dropped below the degree inducing spawning in A. sturio. Under this scenario, our new findings suggest that the genetic mosaic pattern in the Baltic sturgeon population (oxyrinchus mtDNA, sturio and oxyrinchus MHC alleles) is possibly caused by sex-biased introgression where spawning was largely restricted to immigrating American females, while fertilization was predominantly achieved by abundant local European males. The hybrid nature of the former Baltic sturgeon population should be taken into account in the current reintroduction measures.

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Threatened fishes of the world:Acipenser sturio Linnaeus, 1758 (Acipenseridae)

Cited by 30 publications

References 1 publication

Diversity and stability of an estuarine trophic network

Diversity and stability of an estuarine trophic network

European sturgeon (Acipenser sturio L.) young of the year performance in different rearing environments –study within a stocking program

Atlantic sturgeons (Acipenser sturio, Acipenser oxyrinchus): American females successful in Europe

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