Development of a German Action Plan for the restoration of the European sturgeon Acipenser sturio L. - implementing international commitments on a national scale

Geßner, Jörn; Tautenhahn, M.; Spratte, S.; Arndt, G.‐M.; Nordheim, Henning von

doi:10.1111/j.1439-0426.2011.01697.x

Cited by 24 publications

(28 citation statements)

References 15 publications

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“…An exception to the observed lack of focus on such species is the Critically Endangered European sturgeon Acipenser sturio, for which there have been 51 published papers that have focused almost exclusively on conservation-related issues. This species received long-term attention from both the French and the German ministries for the environment, which supported scientifically-based rehabilitation measures and concerted actions as outlined in the Bern Convention Action Plan and its follow-up (Gessner et al 2011).…”

Section: Reasons For Lack Of Researchmentioning

confidence: 99%

“…They are charismatic species with a potential to attract public attention and become symbols of conservation campaigns, while at the same time being rheophilic species that are sensitive to habitat fragmentation, changes in water flow, siltation and water and sediment pollution. The use of sturgeons as umbrella species has recently been proposed for river management in Germany, as a tool to facilitate communication on the conservation of habitat for other threatened species (Gessner et al 2011). It is necessary to increase public awareness of the high extinction risk that sturgeons and paddlefishes face and of the importance of effective protection and management for these species, as baselines can shift rapidly following extirpation or extinction (see e.g.…”

Section: Recommendations For Future Research and Managementmentioning

confidence: 99%

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Sturgeon and paddlefish research focuses on low risk species and largely disregards endangered species

Geßner¹,

Jarić²,

Rochard³

et al. 2013

Endang. Species. Res.

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Section: Reasons For Lack Of Researchmentioning

confidence: 99%

Section: Recommendations For Future Research and Managementmentioning

confidence: 99%

Sturgeon and paddlefish research focuses on low risk species and largely disregards endangered species

Geßner¹,

Jarić²,

Rochard³

et al. 2013

Endang. Species. Res.

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“…According to Gessner, Tautenhahn, Spratte, Arndt, and von Nordheim () and Gessner et al. (), sturgeons and paddlefish are perfect matches with the definitions of both flagship and umbrella species due to their wide ranges, diverse habitat requirements and their public appeal.…”

Section: Resultsmentioning

confidence: 99%

“…They have also been advocated as flagship species by various organizations, such as the World Wildlife Fund (WWF) and the International Commission for the Protection of the Danube River (ICPDR; Kalinkat et al., ). Sturgeons have also been proposed as umbrella species for river management in Germany (Gessner et al., , ).…”

Section: Resultsmentioning

confidence: 99%

Sturgeon and paddlefish life history and management: Experts' knowledge and beliefs

2017

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Summary Although sturgeons and paddlefish represent a highly endangered species group, knowledge regarding their ecology, life history and management and restoration measures still reveals substantial gaps and uncertainties. As such, it was hypothesized that the information on overall experiences and perspectives of researchers working in the field would provide a good indication of the state of knowledge, and help identify areas for further investigation. To gain in‐depth insight into their perspectives on a variety of topics related to sturgeon life history, management and conservation, as well as opinions on issues characterized by a lack of data, a worldwide online survey was conducted among scientists specializing in sturgeon and paddlefish research. With a total of 277 respondents, the response rate was good (40.3% of those invited). The survey results indicated a high level of uncertainty with regard to various aspects of sturgeon life history, such as spawning migrations, reproduction and senescence. Responses differed largely with the origin and the research focus of the participants. Agreement on reported extreme dimensions and lifespans of sturgeons varied among species, but the level of agreement was generally higher among those scientists working on the species in question. Responses on major threats varied regionally, with dams and habitat fragmentation recognized as the major threats by researchers from North America, whereas poaching was considered the dominant threat in Europe and Asia. Sturgeon aquaculture was generally considered as having a positive effect on sturgeon protection by reducing the pressure on natural populations. The Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES) was recognized as the most effective instrument in international sturgeon conservation. While sturgeons are generally perceived as flagship species, especially in Europe, participants questioned their potential utilization as umbrella species. Beside providing an insight into the available scientific information and the general level of consensus regarding some of the questions tackled, the results also created a basis for further discussion within the scientific community concerning the validity, relevance, and application of the published information and future research priorities.

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“…Baltic sturgeon ( Acipenser oxyrinchus) a species originally indigenous to the Baltic region, is now considered extinct today (Gessner et al, ; Gessner, Arndt, Tiedemann, Bartel, & Kirschbaum, ). In order to re‐establish self‐sustaining populations of Baltic sturgeon, restoration programs have attempted to reintroduce the species in its former distribution range by stocking of hatchery‐produced juveniles (Gessner et al, ; Gessner, Tautenhahn, Spratte, Arndt, & Nordheim, ).…”

Section: Introductionmentioning

confidence: 99%

Can juvenile Baltic sturgeon ( Acipenser oxyrinchus ) smell the enemy?

et al. 2019

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Summary Atlantic sturgeon (Acipenser oxyrinchus), also known as Baltic sturgeon, is considered extinct in German waters. Fish‐rearing for conservation purposes largely relies on classical hatchery technology focusing on traits like survival and growth in captivity but rarely focusing on subsequent life in the wild, lacking skills such as foraging or anti‐predation behavior. Predation is hence a major factor for mortality in newly stocked individuals. The aim of this study was to evaluate if naïve Baltic sturgeon juveniles were able to recognize a common predator—zander (Sander lucioperca)—by olfactory cues and adapt accordingly. Over a period of 30 days, Baltic sturgeons were supplied with effluent water from a rearing tank with zander (zander unit) and, as a control, carp (carp unit), three tanks each. Distribution within the tank, morphology of the dorsal scutes, stress (glucose, lactate and cortisol) and gene expression of brain plasticity and cognition were studied in comparison to the control group (carp unit). No significant differences between the zander and the carp unit were observed in any of the parameters measured. Thus, we conclude that naïve Baltic sturgeon is not able to innately recognize potential predators by olfaction alone. Therefore, future studies should focus on applying predator odor together with chemical alarm substances.

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Development of a German Action Plan for the restoration of the European sturgeon Acipenser sturio L. - implementing international commitments on a national scale

Cited by 24 publications

References 15 publications

Sturgeon and paddlefish research focuses on low risk species and largely disregards endangered species

Sturgeon and paddlefish research focuses on low risk species and largely disregards endangered species

Sturgeon and paddlefish life history and management: Experts' knowledge and beliefs

Can juvenile Baltic sturgeon ( Acipenser oxyrinchus ) smell the enemy?

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