Population Viability Analysis of the European Sturgeon (Acipenser sturio L.) from the Gironde Estuary System

Jarić, Ivan; Knežević-Jarić, Jelena; Cvijanović, G.; Lenhardt, Mirjana

doi:10.1007/978-3-642-20611-5_46

Cited by 4 publications

(3 citation statements)

References 34 publications

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“…Sensitivity analysis, both in the stochastic and in deterministic life‐table model, indicated the greatest sensitivity of the model to the adult and subadult survival, while the age at maturity had only a low influence. This is in contrast to the results of previous A. sturio studies (Jarić et al., , ), where the single most influential parameter was the age at which females reach maturity. A lower importance of age at maturity in the present study was likely caused by introduction of the age‐specific fecundity, which was absent in previous studies.…”

Section: Discussioncontrasting

confidence: 99%

“…As opposed to the model presented here, previous population assessments of A. sturio have used the PVA software packages. For instance, Vortex was used to conduct a PVA of A. sturio in the Gironde estuary (Jarić et al., ). However, while PVA software packages can be suitable tools for the development of sturgeon population models, their already predefined basic model setup represents a substantial limitation to the adequate case‐specific incorporation of life history parameters into the model.…”

Section: Discussionmentioning

confidence: 99%

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A life-stage population model of the European sturgeon (Acipenser sturio ) in the Elbe River. Part I: general model outline and potential applications

Jarić

Geßner

2013

J. Appl. Ichthyol.

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The European sturgeon, Acipenser sturio, experienced a dramatic decline during the late 19 th century in Germany. Only after its confirmed extirpation in the wild were ex-situ measures introduced as the basis of a recovery attempt. In order to achieve effective population restoration, it is important to evaluate and compare efficiency of both planned and ongoing remediation measures. For this purpose, a stochastic age-structured model of this population was developed to conduct a population viability analysis and to assess different management and restoration measures. The model revealed a high susceptibility of the species to even very low fishery and by-catch pressures of below 5%. Population recovery was shown to be a very slow process, with a minimum timeframe of 30-50 years. Continuous stocking represents an important initial management measure to accelerate population recovery, reducing by two to three times the time required in comparison to only initial stocking. Habitat remediation (e.g. spawning grounds) in the Elbe River seems necessary, as according to model estimations, the present carrying capacity could sustain no more than a few thousand adults. The model showed a clear correlation between spawning habitat availability and the sustained number of adults.U.S.

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Section: Discussioncontrasting

confidence: 99%

Section: Discussionmentioning

confidence: 99%

A life-stage population model of the European sturgeon (Acipenser sturio ) in the Elbe River. Part I: general model outline and potential applications

Jarić

Geßner

2013

J. Appl. Ichthyol.

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“…Both river management schemes and increasing water pollution in the course of industrialization caused a drastic decline and in most regions even extinction of the local populations (Mohr, ; Kinzelbach, ). Since then, apart from a small relict population in the French Gironde–Garonne–Dordogne basin (Jarić et al ., ) sturgeons have disappeared from eastern Atlantic waters (Debus, ; Gessner, ; Kolman et al ., ).…”

Section: Introductionmentioning

confidence: 99%

Reconstruction of the historical distribution of sturgeons (Acipenseridae) in the eastern North Atlantic based on ancientDNAand bone morphology of archaeological remains: implications for conservation and restoration programmes

Nikulina

Schmölcke

2016

Diversity and Distributions

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Aim In the 19th/early 20th century, overfishing caused a drastic decline and finally extinction of the local sturgeon populations in the eastern Atlantic. To date, it is not known whether it was Acipenser sturio or the primarily North American Acipenser oxyrinchus that occurred here. The aim of the study was to show the historical pattern of sturgeon distribution and their diversity in this area over the last 2500 years. This question is essential for international restoration programmes. Location North‐east Atlantic. Methods The study is based on 438 archaeological sturgeon remains from the estuaries of the rivers Rhine, Ems, Weser, Elbe and Eider. All bones were analysed morphologically and in 38 cases genetically by the amplification of two mitochondrial DNA fragments. Results The data from the bones older than 1000 years show that only 1.4% derive from A. sturio. In the south, this species was slightly more frequent. From the Elbe northwards, A. oxyrinchus was for a long time by far the dominant sturgeon species. Main conclusions The genetic identification of the oldest sturgeon bone shows A. oxyrinchus occurred in the north‐eastern Atlantic already 6000 years ago. Consequently, the immigration of this species from North America to Europe occurred even earlier, potentially during the last glacial. The north–south occurrence of the two sturgeon species suggests that the distribution was the result of interspecific competition under different and changing environmental conditions. As previously published, genetic data from about 100‐ to 200‐year‐old museum specimens show strong dominance of A. sturio in the North Sea area, obviously A. oxyrinchus has been replaced in the time between 1000 and 200 years ago. Therefore, the Holocene distribution of sturgeons in the north‐east Atlantic had a complex pattern. Determining the ecological bases of this distribution is important for the justification and success of restoration programmes.

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Reproductive Cycles in Sturgeons with a Special Focus on the Farmed Siberian Sturgeon

Williot¹,

Chebanov

2017

The Siberian Sturgeon (Acipenser Baerii, Brandt, 1869) Volume 2 - Farming

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Population Viability Analysis of the European Sturgeon (Acipenser sturio L.) from the Gironde Estuary System

Cited by 4 publications

References 34 publications

A life-stage population model of the European sturgeon (Acipenser sturio ) in the Elbe River. Part I: general model outline and potential applications

A life-stage population model of the European sturgeon (Acipenser sturio ) in the Elbe River. Part I: general model outline and potential applications

Reconstruction of the historical distribution of sturgeons (Acipenseridae) in the eastern North Atlantic based on ancientDNAand bone morphology of archaeological remains: implications for conservation and restoration programmes

Reproductive Cycles in Sturgeons with a Special Focus on the Farmed Siberian Sturgeon

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