scholarly journals Current stocking program of the sterlet (Acipenser ruthenus, L.) can negatively shape its genetic variability in the Middle Danube

2019 ◽  
pp. 19
Author(s):  
Ladislav Pekárik ◽  
Zuzana Čiamporová-Zaťovičová ◽  
Darina Arendt ◽  
Fedor Čiampor
Keyword(s):  
Wild Population ◽  
Danube River ◽  
Population Recovery ◽  
Proper Actions ◽  
The Danube River ◽  
Management Actions ◽  
Acipenser Ruthenus ◽  
Sturgeon Species ◽  
Negative Impacts ◽  
Sterlet Acipenser Ruthenus

The Danube River was originally inhabited by six native sturgeon species, but currently, the sterlet (Acipenser ruthenus L.) is the only native sturgeon species still occupying the Slovak–Hungarian stretch of the Middle Danube. All sturgeon species are facing extinction, suffering from overfishing, water pollution, illegal fishing, poaching or other negative impacts. Urgent and proper actions are needed to prevent their extinction, and evaluating its genetic diversity is one of the essential tools of conservation programs. Since the management actions are primarily local in nature, we first focused on comparing and analysing local sources of fish for population recovery and natural (wild) population in the adjacent stretch of the Danube River. We used 2 fragments of mitochondrial DNA and 12 microsatellites to analyse the genotype of the three groups of sterlets, i.e. wild, broodstock and stocked individuals from Slovak part of the Danube. Mitochondrial markers of all groups were diversified similarly to populations from other parts of the Danube. This confirmed that broodstock and stocked fish belong to the original Danube population. Microsatellites revealed very similar patterns among groups compared, but we detected possible negative trends reflected in losing polymorphism in a few loci in broodstock and stocked individuals.

scholarly journals The fauna of endoparasites in Acipenser ruthenus Linnaeus, 1758 from the Serbian part of the Danube River

2008 ◽  
Vol 60 (1) ◽  
pp. 103-107 ◽  
Author(s):  
P. Cakic ◽  
Vesna Djikanovic ◽  
Z. Kulisic ◽  
M. Paunovic ◽  
Dunja Jakovcev-Todorovic ◽  
...  
Keyword(s):  
Helminth Species ◽  
Danube River ◽  
The Danube River ◽  
Acipenser Ruthenus ◽  
Different Ages ◽  
Sterlet Acipenser Ruthenus

Helminths of sterlet (Acipenser ruthenus L.) from the Danube River were studied as a part of ichthyoparasitological research in Serbia. The fish were collected during the period of 2002 - 2003 along the Danube's course through the Belgrade region. A total of 517 specimens of sterlet of different ages (0+ to 1+) were examined. Helminths were found in 342 or 66.15% of the collected specimens. The examined fish yielded a total of 13 helminth species: four species of Trematoda, one species of Cestoda, four species of Nematoda, and four species of Acanthocephala.

Assessing pollution in the Danube River near Novi Sad (Serbia) using several biomarkers in sterlet (Acipenser ruthenus L.)

2006 ◽  
Vol 65 (3) ◽  
pp. 395-402 ◽  
Author(s):  
Bojana Stanic ◽  
Nebojsa Andric ◽  
Sonja Zoric ◽  
Gordana Grubor-Lajsic ◽  
Radmila Kovacevic
Keyword(s):  
Danube River ◽  
The Danube River ◽  
Acipenser Ruthenus ◽  
Novi Sad ◽  
Sterlet Acipenser Ruthenus

scholarly journals Feeding ecology of sterlet Acipenser ruthenus L. in the Hungarian section of the Danube River

2011 ◽  
Vol 19 (2) ◽  
Author(s):  
Jozsef Fieszl ◽  
Elżbieta Bogacka-Kapusta ◽  
Andrzej Kapusta ◽  
Urszula Szymańska ◽  
Andrzej Martyniak
Keyword(s):  
Feeding Ecology ◽  
Danube River ◽  
The Danube River ◽  
Acipenser Ruthenus ◽  
Sterlet Acipenser Ruthenus

scholarly journals Location of fishing points of sterlet (Acipenser ruthenus L. 1758) for forensic-ichthyological examination

2019 ◽  
Vol 2019 (4) ◽  
pp. 70-78
Author(s):  
Gleb Igorevich Volosnikov
Keyword(s):  
Statistical Processing ◽  
Time Interval ◽  
Research Station ◽  
Meristic Characters ◽  
Representative Sampling ◽  
Acipenser Ruthenus ◽  
Sturgeon Species ◽  
Kolmogorov Smirnov ◽  
Academy Of Sciences ◽  
Sterlet Acipenser Ruthenus

The paper describes the details of the investigative actions taken in terms of the struggle against poaching, where the researchers of the Tobolsk Complex Research Station of the Ural Branch of the Russian Academy of Sciences carry out the forensic ichthyologic examination of illegally caught water bioresources. The researchers often encounter the need to investigate or confirm the alleged place of catching fish species submitted for examination. There have been considered the possibilities to determine the habitat of the caught sturgeon species, in particular sterlet (Acipenser ruthenus L. 1758) using direct comparative analysis and statistical processing of meristic characters of the alleged populations, because there is evidence of existing broodstocks of this species, linked to the specific water areas. The analysis was carried out using 357 specimens of sterlet caught in 4 different areas of the Lower Irtysh. Absence of significant differences in the means of meristic characters in the species of the studied groups can be explained by insufficiently representative sampling, which is frequent in forensic ichthyologic examinations. Nevertheless, according to a number of characteristics, one can speak of a certain heterogeneity of the samples, which indicates the presence of features in the distribution of individuals in the population. Additional statistical data processing by means of Kolmogorov–Smirnov non-parametric two-sample criterion demonstrates a reliable interpopulation difference in meristic characters including the case of scanty sampling. Expanding the study in terms of increasing the number of samples and pairs for comparison, as well as feasibility of analyzing the meristic characters in a longer time interval is being considered.

scholarly journals PRACTICE OF ARTIFICIAL REPRODUCTION OF STERLAD (ACIPENSER RUTHENUS LINNAEUS) IN RECIRCULATING AQUACULTURE SYSTEM (IN MANGISTAU REGION)

2020 ◽  
Vol 2020 (3) ◽  
pp. 111-124
Author(s):  
Yefim Fedorovich Bulavin ◽  
Guldana Maratkizi Maratova ◽  
Saule Zhangirovna Asylbekova ◽  
Kuanysh Baibulatovich Isbekov ◽  
Saya Kashkinbayevna Koyshibaeva ◽  
...  
Keyword(s):  
Fish Farming ◽  
Artificial Reproduction ◽  
Recirculating Aquaculture System ◽  
Hormonal Stimulation ◽  
Commercial Fish ◽  
Acipenser Ruthenus ◽  
Recirculating Aquaculture ◽  
Aquaculture System ◽  
Sturgeon Species ◽  
Sterlet Acipenser Ruthenus

The paper presents the results of artificial reproduction of sterlet (Acipenser ruthenus Linnaeus) carried out at the Scientific Production Center KazakhOsseter, LLP (the Mangistau region) in conditions of a recirculating aquatic system (RAS). The conditions for carrying out the main reproduction measures are described: wintering, qualifying, hormonal stimulation, obtaining reproductive products and rearing larvae. As a result, the sterlet spawning campaign was carried out in conditions of RAS in the Mangistau region, the native grown viable sterlet larvae being obtained. In the course of the work carried out in conditions of RAS in the Mangistau region there have been developed the scientific foundations and technologies for the formation and using production stocks of sturgeon, which are involved in the process of artificial reproduction. The results of the work performed could help to effectively organize the production at the commercial fish farming enterprises in the Mangistau region. The entrepreneurs of the region will have the opportunity to get acquainted with the technology of fish growing in conditions of RAS and to apply the technology for obtaining and reproducing sturgeon species in the ir local hatcheries in the future.

scholarly journals Development and characterization of novel cross-species tetranucleotide microsatellite markers for sterlet (Acipenser ruthenus) from Chinese sturgeon (Acipenser sinensis)

2019 ◽  
Author(s):  
Yacheng Hu ◽  
Jing Yang ◽  
Xueqing Liu ◽  
Kan Xiao ◽  
Binzhong Wang ◽  
...  
Keyword(s):  
Microsatellite Markers ◽  
Polymorphic Information Content ◽  
Diversity Indices ◽  
Chinese Sturgeon ◽  
Acipenser Sinensis ◽  
Management Actions ◽  
Acipenser Ruthenus ◽  
The Mean ◽  
Sterlet Acipenser Ruthenus

Sterlet (Acipenser ruthenus) is an important economic fish because of its nourishing caviar, isinglass and flesh. In order to facilitate the recovery of this species, the full understanding of its population genetic structure is necessary for taking appropriate management actions. However, genetic data on the use of nuclear loci in sterlet is still quite poor because microsatellite markers in sterlet that had been developed appeared to be polyploidy which add difficulties in studying the genetic of the sterlet. In this study, 24 tetranucleotide microsatellite markers were developed in sterlet from 160 microsatellite markers of the endangered Chinese sturgeon (Acipenser sinensis). Ten (ZHX76, ZHX64, Z194, Z217, Z184, Z242, Z250, Z258, Z268 and Z269) of the 24 loci showed disomic patterns while the rest loci showed tetrasomic patterns. In this paper, 24 microsatellite markers were characterized in 16 sterlet individuals and all of them were polymorphic with 2 to 7 alleles per locus. The Hardy-Weinberg departure value (d), polymorphic information content (PIC), the observed heterozygosity (HO), the Shannon-Wiener Diversity Indices (H') and the mean expected heterozygosity (HE) of all 24 polymorphic loci ranged from -0.334 to 0.484, 0.367 to 0.725, 0.438 to 1, 0.659 to 1.695, from 0.466 to 0.777, respectively. The markers described here will help in addressing practical problems such as the study of population genetics, conservation genetics and evolution in the polyploidy derivative nature of sterlet.

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