Bayesian modelling suggests that the sterlet ( Acipenser ruthenus , Linnaeus 1758) population is ageing in the middle Danube River

2021 ◽  
Author(s):  
Maroš Kubala ◽  
Martin Farský ◽  
Tibor Krajč ◽  
Ladislav Pekárik
Keyword(s):  
Danube River ◽  
Bayesian Modelling ◽  
Acipenser Ruthenus ◽  
Sterlet Acipenser Ruthenus

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 Ancient Sturgeons Possess Effective DNA Repair Mechanisms: Influence of Model Genotoxicants on Embryo Development of Sterlet, Acipenser ruthenus

2020 ◽  
Vol 22 (1) ◽  
pp. 6
Author(s):  
Ievgeniia Gazo ◽  
Roman Franěk ◽  
Radek Šindelka ◽  
Ievgen Lebeda ◽  
Sahana Shivaramu ◽  
...  
Keyword(s):  
Gene Expression ◽  
Dna Damage ◽  
Dna Repair ◽  
Embryo Development ◽  
Hatching Rate ◽  
Embryo Survival ◽  
Dna Repair Mechanisms ◽  
Acipenser Ruthenus ◽  
Repair Mechanisms ◽  
Sterlet Acipenser Ruthenus

DNA damage caused by exogenous or endogenous factors is a common challenge for developing fish embryos. DNA damage repair (DDR) pathways help organisms minimize adverse effects of DNA alterations. In terms of DNA repair mechanisms, sturgeons represent a particularly interesting model due to their exceptional genome plasticity. Sterlet (Acipenser ruthenus) is a relatively small species of sturgeon. The goal of this study was to assess the sensitivity of sterlet embryos to model genotoxicants (camptothecin, etoposide, and benzo[a]pyrene), and to assess DDR responses. We assessed the effects of genotoxicants on embryo survival, hatching rate, DNA fragmentation, gene expression, and phosphorylation of H2AX and ATM kinase. Exposure of sterlet embryos to 1 µM benzo[a]pyrene induced low levels of DNA damage accompanied by ATM phosphorylation and xpc gene expression. Conversely, 20 µM etoposide exposure induced DNA damage without activation of known DDR pathways. Effects of 10 nM camptothecin on embryo development were stage-specific, with early stages, before gastrulation, being most sensitive. Overall, this study provides foundational information for future investigation of sterlet DDR pathways.

Role of Ca2+ in the IVM of spermatozoa from the sterlet Acipenser ruthenus

2017 ◽  
Vol 29 (7) ◽  
pp. 1319 ◽  
Author(s):  
Olga Bondarenko ◽  
Borys Dzyuba ◽  
Marek Rodina ◽  
Jacky Cosson
Keyword(s):  
Sperm Motility ◽  
Seminal Fluid ◽  
Mature Male ◽  
Sperm Maturation ◽  
Wolffian Duct ◽  
Testicular Spermatozoa ◽  
Acipenser Ruthenus ◽  
Sterlet Acipenser Ruthenus ◽  
Motility Parameters

The role of Ca2+ in sturgeon sperm maturation and motility was investigated. Sperm from mature male sterlets (Acipenser ruthenus) were collected from the Wolffian duct and testis 24 h after hormone induction. Testicular spermatozoa (TS) were incubated in Wolffian duct seminal fluid (WDSF) for 5 min at 20°C and were designated ‘TS after IVM’ (TSM). Sperm motility was activated in media with different ion compositions, with motility parameters analysed from standard video microscopy records. To investigate the role of calcium transport in the IVM process, IVM was performed (5 min at 20°C) in the presence of 2 mM EGTA, 100 µM Verapamil or 100 µM Tetracaine. No motility was observed in the case of TS (10 mM Tris, 25 mM NaCl, 50 mM Sucr with or without the addition of 2 mM EGTA). Both incubation of TS in WDSF and supplementation of the activation medium with Ca2+ led to sperm motility. The minimal Ca2+ concentration required for motility activation of Wolffian duct spermatozoa, TS and TSM was determined (1–2 nM for Wolffian duct spermatozoa and TSM; approximately 0.6 mM for TS). Motility was obtained after the addition of verapamil to the incubation medium during IVM, whereas the addition of EGTA completely suppressed motility, implying Ca2+ involvement in sturgeon sperm maturation. Further studies into the roles of Ca2+ transport in sturgeon sperm maturation and motility are required.

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