Ralf Reinartz's research while affiliated with blattfisch e.U. - Consultants in Aquatic Ecology and Engineering and other places
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Publications (7)
Sturgeon 2020 was elaborated in the frame of the EU Strategy for the Danube Region - PA 6 with the aim to foster sturgeon conservation in the Danube River Basin and the adjacent Black Sea area.
The program "Sturgeon 2020" was elaborated by the Danube Sturgeon Task Force (DSTF) in the frame of the EU Strategy for the Danube Region with the aim to foster sturgeon conservation in the Danube River Basin and the adjacent Black Sea.
Genotype structure of Acipenser ruthenus was investigated using microsatellites and mtDNA sequence analyses of 247 specimens of 13 locations from the rivers Danube, Volga and Kuban. These studies were done as an essential prerequisite for the conservation of the uppermost relict sterlet population which is located in the Danube River near the borde...
Most natural populations of Eurasian sturgeons have declined dramatically during recent decades, reaching historic low levels
today. During the same period, sturgeon has become very popular in European aquaculture. Because many hatcheries are located
near rivers, their unintentional escape is often documented, especially during floods. Until now, n...
Six species of sturgeons are native to the Danube River Basin, five are classified as either 'Endangered' or 'Critically Endangered', and one 'Vulnerable' according to the 2004 IUCN Red List of Threatened Species. In fact, one of the five endangered species, the Atlantic sturgeon (Acipenser sturio), is already extinct in the Danube River Basin. The...
Citations
... Sturgeons, living fossils, are endangered fish species, and any effort to increase their production in captivity and rearing conditions is worthwhile (Reinartz & Bloesch, 2006). Today, farming sturgeons are expanding due to their precious meat and caviar; meanwhile, little data is available concerning the nutritional requirements (Ghodrati et al., 2021;Hasanpour et al., 2017). ...
... One consistent request by several organizations, action plans, and projects that have targeted sturgeon conservation is the establishment of a permanent and standardized monitoring program (e.g. Friedrich 2018;Friedrich et al. 2018;ICPDR 2018;Sandu et al. 2013), which would contribute to documenting changes in population dynamics for adaptive management. Such a permanent monitoring network could be readily implemented if based on repeated eDNA sampling campaigns. ...
... Pontocaspian biota is threatened and rapidly declining due to direct anthropogenic drivers, such as damming of rivers, modification of marine and freshwater influx in coastal areas, and invasive species among others (Son, 2007a,b;van de Velde et al., 2019;Gogaladze et al., 2021), as well as indirect drivers, such as limited knowledge on PC species and suboptimal institutional cooperation of stakeholders (Wesselingh et al., 2019;Gogaladze et al., 2020a,b). The legal basis to address the decline of PC biodiversity has not been studied, with the exception of sturgeon species (Reinartz et al., 2012;Munteanu et al., 2013). ...
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... Among sturgeons, Acipenser stellatus is one of the three most important species for caviar (Frimodt, 1995). Due to overfishing (Aghilinejhad et al., 2018), poaching (Bloesch et al., 2006), pollution or dam construction (Reinartz and Slavcheva, 2016), the sturgeon population experiencing a severe decline (Lenhardt et al., 2006;Bronzi and Rosenthal, 2014;EUMOFA, 2018). Although considerable efforts have been made during the last years and several conservation measures have been taken, their status continuously decreased and nowadays almost all sturgeon species are listed as critically endangered (Qiwei, 2010). ...
... At present, the potamodromous sterlet (Acipenser ruthenus Linnaeus, 1758) is the only species still occurring in small numbers in the UD [5]. The species has patterns of a panmictic population in the Danube [6], but the fractured range with the barriers being mostly impassable for the species may lead to genetic separation of sub-populations, as gene flow is restricted to downstream drift and outmigration of juveniles and adults. The remnant sub-population in the UD within Austria is estimated to be less than 1000 reproductive adults [7]. ...
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... Acipenseridae species are becoming popular in the food industry because products made with the caviar, meat, oil, and air bladder have an exquisite taste [27,28]. However, demand has fallen short of supply, leading to indiscriminate overfishing, which has placed many Acipenseridae species in the danger of extinction [29]. Therefore, aquaculture research aimed at replenishing Acipenseridae numbers has been conducted over the past decade, and studies on preserving resources to increase wild populations of Acipenseridae are also considered important [29,30]. ...
