Article
Environmental Sciences
D. Mameri, D. S. Hayes, S. Fuehrer, E. Fauchery, S. Schmutz, A. Monserat, T. Hasler, D. R. M. Graf, J. M. Santos, M. T. Ferreira, S. Auer
Summary: Research on the effects of intermittent water releases from hydropower plants on fish early life stages has shown that flow and thermal fluctuations can impact fish movement patterns and migration. A study using experimental outdoor channels found that a rapid drop in water temperature during hydropeaking increased fish drift, especially when accompanied by pronounced water temperature drops. Cold thermopeaking may result in higher drift rates compared to hydropeaking with stable water temperature. Monitoring and adjusting water temperature can help mitigate the impacts of hydropower on aquatic organisms.
Article
Environmental Sciences
Simon Fuehrer, Daniel S. Hayes, Thomas Hasler, David R. M. Graf, Elora Fauchery, Daniel Mameri, Stefan Schmutz, Stefan Auer
Summary: This study quantifies the consequences of flow down-ramping on nase larvae, revealing differences between larval stages. Lower sloped riverbanks and higher down-ramping rates lead to higher stranding rates. There are differences in stranding rates between day and night. These findings contribute to a deeper understanding of the effects of artificial sub-daily flow fluctuations on cyprinid fish and can inform mitigation strategies for hydropower operations.
FRONTIERS IN ENVIRONMENTAL SCIENCE
(2022)
Article
Environmental Sciences
Dusan Nikolic, Srdan Subotic, Stefan Skoric
Summary: This study analyzed individuals of common nase from waterbodies with different characteristics and levels of anthropogenic pressure. The results showed that the type of ecosystem and the degree of anthropogenic pressure are important factors in environmental pollution. The fish meat had low levels of metal pollution and was safe for consumption.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Environmental Sciences
Angela Curtean-Banaduc, Claudia Mihut, Alexandru Burcea, Grant S. McCall, Claudiu Matei, Doru Banaduc
Summary: Based on its mouth morphology and feeding behavior, the nase acts as a vector for microplastics in freshwater ecosystems. Microplastic fibers are unlikely to be found in fish gastrointestinal tissue and muscle tissue, but their presence in the gastrointestinal content indicates their difficulty in becoming embedded in other organs. The low concentration of microplastics in fish tissues suggests the need for monitoring and managing their presence in aquatic ecosystems.
Article
Environmental Sciences
Bernhard C. Stoeckle, Melanie Mueller, Christoffer Nagel, Ralph Kuehn, Juergen Geist
Summary: Supportive breeding programmes are crucial for the conservation of declining freshwater fishes. However, breeding offspring can lead to decreased genetic diversity and inbreeding effects. Genetic analysis shows significant genetic differentiation between captive-bred common nase and wild populations, with lower genetic diversity and signs of inbreeding in the captive-bred and one of the natural populations.
AQUATIC CONSERVATION-MARINE AND FRESHWATER ECOSYSTEMS
(2022)
Article
Ecology
Ruamruedee Panchan, Kurt Pinter, Stefan Schmutz, Guenther Unfer
Summary: This study monitored the migration patterns and habitat use of adult barbel and nase in the Danube River. The results showed that both species utilized the entire width and depth spectrum of the river. The habitat use differed between the two species, with nase primarily found in the free-flowing section and barbel mainly using deep areas of the impoundment.
ENVIRONMENTAL BIOLOGY OF FISHES
(2022)
Article
Fisheries
Christoffer Nagel, Christina Spiessl, Joachim Pander, Juergen Geist
Summary: This study established a standardized protocol for assessing the egg surface quality of common nase eggs using SEM images, and found significant differences in egg surface properties among individual females and among different populations. These differences were mainly attributed to length variability and merging of adhesive villi, as well as to coating and filament-like connections of these structures. Further investigations are needed to better understand the relationship of egg surface properties, egg stickiness, and hatching success for early life stages in freshwater fish.
JOURNAL OF APPLIED ICHTHYOLOGY
(2021)
Article
Biodiversity Conservation
Christoffer Nagel, Jan Droll, Katharina Kroemer, Joachim Pander, Juergen Geist
Summary: This study tested the effect of PIT tags implanted into common nase and European barbel. The results demonstrated the suitability of this tagging technique for these fish species, which is of high methodological importance for assessing freshwater fish conservation in European rivers.
ANIMAL BIOTELEMETRY
(2023)
Article
Green & Sustainable Science & Technology
Roman Lyach
Summary: The study found that intensive stocking and harvesting of European catfish resulted in lower harvest rates of rheophilic fishes, with no significant correlation between stocking rates and harvest rates of rheophilic fishes. This suggests that fisheries managers should not conduct intensive stocking of both catfish and rheophilic fishes in the same rivers.
Article
Agriculture, Dairy & Animal Science
Petya Zaharieva, Diana Kirin
Summary: The study investigated the cadmium content in tissues and organs of common nase and water and sediments in the Danube River ecosystem. The highest concentration of cadmium was found in the liver of common nase. Additionally, the study compared the specified norms in national and international documents with the actual concentrations obtained.
SCIENTIFIC PAPERS-SERIES D-ANIMAL SCIENCE
(2021)
Article
Agriculture, Dairy & Animal Science
Radoslava Zaharieva, Diana Kirin
Summary: The study found that common nase from the Danube River near Kudelin village is a new host for P. torulosus, and Contracaecum sp. larvae is the main parasite species. Contracaecum sp. larvae showed high mean intensity and abundance in this ecosystem.
SCIENTIFIC PAPERS-SERIES D-ANIMAL SCIENCE
(2021)
Article
Biochemistry & Molecular Biology
Sarah Fruehwirth, Sandra Egger, Dennis Kurzbach, Jakob Windisch, Franz Jirsa, Thomas Flecker, Miriam Ressler, Agnes T. Reiner, Nesrin Firat, Marc Pignitter
Summary: The study found that ingredients like citric acid, rosemary, and green tea extract have a positive impact on the oxidative stability of margarine, while monoglycerides and alpha-tocopheryl acetate can promote lipid oxidation. Green tea extract exhibits the most prominent antioxidant effect on margarine.
Article
Parasitology
James Omondi Outa, Quinton Marco Dos Santos, Annemarie Avenant-Oldewage, Franz Jirsa
Summary: The introduction of fish species and changes in environmental quality have led to shifts in parasite diversity and communities in Lake Victoria. Nile tilapia was the most common host in the study, with variation in parasite species and abundance among fish species.
PARASITOLOGY RESEARCH
(2021)
Review
Engineering, Environmental
Regina Krachler, Rudolf F. Krachler
Summary: SAHLs loaded with iron from river runoff reach the oceans annually. They are strong iron-binding ligands in the ocean, resisting dissociation in high dilution. SAHLs are efficient in releasing bioavailable Fe(II) under UV light in surface waters, while remaining stable and transporting iron in ocean currents at greater depths.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
Article
Engineering, Environmental
Felix Panis, Rudolf F. Krachler, Regina Krachler, Annette Rompel
Summary: Bacterial tyrosinases in peatlands are considered crucial regulators of carbon storage by removing phenolic compounds that inhibit organic carbon degradation. Recent summer droughts have increased tyrosinase activity, leading to the release of stored carbon. Understanding tyrosinase production and activity is essential for assessing the impact of peatland carbon dioxide emissions on climate change.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
Article
Environmental Sciences
N. Valiente, F. Jirsa, T. Hein, W. Wanek, J. Prommer, P. Bonin, J. J. Gomez-Alday
Summary: This study demonstrates the coexistence of denitrification, DNRA, and anammox processes in a highly saline lake, with their contribution determined by environmental conditions such as oxygen and light. DNRA, especially denitrification to N2O, were the dominant nitrogen removal pathways in the presence of oxygen and/or light. Conversely, anoxia and darkness promoted NO3- reduction by DNRA combined with N loss by anammox.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Engineering, Environmental
Jakob Windisch, Christof Plessl, Christiane Christian, Thomas Zechmeister, Franz Jirsa
Summary: This study investigated the differences in Hg turnover, distribution, and bioaccumulation in two contrasting waterbodies, showing a faster Hg turnover and higher bioaccumulation in LN compared to PL, potentially leading to unexpected mercury biomagnification in LN due to specific physico-chemical and biological conditions.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Limnology
Nicolas Valiente, Franz Jirsa, Juan Jose Gomez-Alday
Summary: This article provides an overview of the importance of saline lakes as barriers against pollution, with a focus on nitrogen (N) pollution and its attenuation in aquatic interfaces. The study of how saline lakes can reduce the impact of pollutants on ecosystems is crucial and requires the integration of techniques from different disciplines.
Article
Environmental Sciences
Wolfram Adlassnig, Brigitte Schmidt, Franz Jirsa, Andreas Gradwohl, Caroline Ivesic, Marianne Koller-Peroutka
Summary: In environments with high levels of arsenic and antimony contamination, the survival of larvae of amphibians is questionable. However, adult amphibians do not appear to suffer apparent damage under severe metalloid contamination.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH
(2022)
Article
Chemistry, Multidisciplinary
Nicolas Valiente, Alexander Pangerl, Juan Jose Gomez-Alday, Franz Jirsa
Summary: This study assessed the distribution and concentration of heavy metals in Petrola Lake, Spain and identified their potential sources. The results showed the accumulation of lead in lake sediments and cadmium in agricultural soils, likely derived from anthropogenic activities. The study also found low bioaccumulation of heavy metals in the tissues of the greater flamingo.
APPLIED SCIENCES-BASEL
(2022)
Article
Ecology
James Omondi Outa, Christoph Hoerweg, Annemarie Avenant-Oldewage, Franz Jirsa
Summary: This study explores the diversity of symbionts associated with freshwater molluscs in Lake Victoria, and identifies previously unreported parasites. The study also compares the infection rates of symbionts in molluscs from polluted and unpolluted sites. The results reveal antagonistic interactions between certain symbionts and the impact of pollution on infection rates.
FRESHWATER BIOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Jakob Windisch, Andreas Gradwohl, Beric Michael Gilbert, Quinton Marco Dos Santos, Gabriele Wallner, Annemarie Avenant-Oldewage, Franz Jirsa
Summary: This study investigated the water and sediment in the Crocodile River (West) system and found elevated concentrations of nickel, zinc, arsenic, lead, and uranium in the sediment near the mine and downstream, posing a potential threat to the connected river system.
APPLIED SCIENCES-BASEL
(2022)
Article
Biology
Alfred Burian, Martin Gruber-Dorninger, Johannes Schweichart, Andrew Yasindi, Mark Bulling, Franz Jirsa, Christian Winter, Anastasia W. Muia, Michael Schagerl
Summary: Ratios between viruses, heterotrophic prokaryotes and chlorophyll a are key indicators of microbial food structure. Our study found that microbial community ratios in African soda-lakes are different from other ecosystem types, indicating unique response mechanisms.
PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES
(2023)
Article
Chemistry, Multidisciplinary
Andreas Gradwohl, Jakob Windisch, Matthias Weissensteiner, Bernhard K. Keppler, Wolfgang Kandioller, Franz Jirsa
Summary: The task-specific ionic liquid trihexyltetradecylphosphonium 3-hydroxy-2-naphthoate is a suitable extraction agent for rare earth elements, achieving high extraction efficacies and minimal precipitation of the metals. The extraction efficiency is influenced by pH, temperature, and extraction time, and anion exchange is the extraction mechanism. The leaching into the used matrices is in line with literature values and is not significantly affected by temperature.
Article
Biochemistry & Molecular Biology
Anna Rathgeb, Tim Causon, Regina Krachler, Stephan Hann
Summary: The low solubility of inorganic iron(III) in seawater limits its availability as a micronutrient for marine organisms. The binding of iron to organic ligands in estuarine or oceanic environments is of high interest. This study investigated the low molecular weight iron-binding constituents in Suwannee River natural organic matter (NOM). The results support the hypothesis that low molecular weight constituents can play a role in the iron binding mechanism of DOM.
Article
Parasitology
F. Jirsa, S. Reier, L. Smales
Summary: This study aimed to close the gap in knowledge about the helminth community of mallards in Austria by analyzing parasites from 60 birds shot by hunters. The results showed a particularly low diversity of helminths in the Austrian mallard population, especially in terms of cestodes and nematodes. The distribution of parasite intensity followed a typical pattern, with most birds being lightly parasitized or uninfected.
JOURNAL OF HELMINTHOLOGY
(2021)