Review
Virology
Mona Saleh, Boglarka Sellyei, Gyula Kovacs, Csaba Szekely
Summary: Disease management and pathogen control are crucial for a successful fish farming industry, especially in European catfish farming. While ranavirus and circovirus are well-described pathogens, the etiological role of other viruses in catfish remains unclear, necessitating further investigation.
Article
Agronomy
Cristina Simeanu, Emanuel Magdici, Benone Pasarin, Bogdan-Vlad Avarvarei, Daniel Simeanu
Summary: Quantitative and qualitative flesh production in Silurus glanis species from aquaculture and a natural environment were comparatively studied. The results showed better values in aquaculture catfish in terms of morphology and yield. Postslaughter, the quality and nutritional value of the fish flesh changed during the refrigeration period. The study also found that the origin of the fish and refrigeration period influenced the flesh composition and nutritional value of European catfish.
Article
Ecology
Samuel Westrelin, Mathieu Moreau, Vincent Fourcassie, Frederic Santoul
Summary: This study analyzed the overwintering behavior of European catfish and found that the formation of aggregations was triggered by low temperatures. The stability of these aggregations was influenced by decreasing temperatures, and individuals were more likely to leave the aggregation at dusk and at night when temperatures increased. Additionally, the size of the fish and the timing of arrival also affected the aggregative behavior.
Article
Virology
Flora Abonyi, Adam Varga, Boglarka Sellyei, Edit Eszterbauer, Andor Doszpoly
Summary: This study highlights the varying impacts of European catfish virus (ECV) infection in different age groups of wels catfish. The youngest age group showed the highest mortality rates, emphasizing the importance of preventing and protecting against virus infections in juvenile wels catfish (up to 3 months old) in aquaculture.
Article
Environmental Sciences
Victor Frossard, Chloe Vagnon, Nathalie Cottin, Mathieu Pin, Frederic Santoul, Emmanuel Naffrechoux
Summary: This study examined the impact of invasive European catfish on the food web structure and PCB transfer in a large lake ecosystem. The results showed that the invasive catfish had higher PCB contamination and biomagnification compared to the native Northern pike. The findings suggested that the invasive catfish's presence in the ecosystem could enhance the transfer of PCB to higher trophic levels.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Fisheries
Zsuzsanna J. Sandor, Norbert Revesz, Katalin Kinga Lefler, Radmilo Colovic, Vojislav Banjac, Shivendra Kumar
Summary: Two experiments were conducted to evaluate the suitability of corn DDGS as a protein source for European catfish. The results showed that corn DDGS is a beneficial protein source for European catfish and 30% DDGS can be included in their diet without compromising growth performance and nutrient utilization.
AQUACULTURE REPORTS
(2021)
Article
Agricultural Engineering
Erkan Gumus, Adil Yilayaz, Mahir Kanyilmaz, Bahar Gumus, Murat Balaban
Summary: Image analysis was used to evaluate weight estimation and colors of European catfish and African catfish. Different equations were used to determine the relationships between weight and length/view area, showing slight differences between the two fish species. The average color values showed no significant difference between the two species.
AQUACULTURAL ENGINEERING
(2021)
Article
Biochemistry & Molecular Biology
Merve Tinkir, Devrim Memis, Yu Cheng, Miaomiao Xin, Marek Rodina, David Gela, Vladimira Tuckov, Otomar Linhart
Summary: This study focused on the short-term storage of European catfish eggs, finding that fertilization and total hatching rates decreased with storage time at 17 degrees Celsius. The optimal in vitro fertilization time was determined to be 5 hours. While egg storage time did not correlate with fry malformation levels, storage temperature above 17 degrees Celsius had a clear impact on hatching and malformation rates.
FISH PHYSIOLOGY AND BIOCHEMISTRY
(2021)
Article
Biodiversity Conservation
Paul Castagne, Ivan Paz-Vinas, Stephanie Bouletreau, Jessica Ferriol, Geraldine Loot, Charlotte Veyssiere, Robert Arlinghaus, Robert Britton, Marlene Chiarello, Emili Garcia-Berthou, Pavel Horky, Delphine Nicolas, Annamaria Nocita, Oscar Nordahl, Michaël Ovidio, Filipe Ribeiro, Ondrej Slavik, Chloe Vagnon, Simon Blanchet, Frederic Santoul
Summary: Biological invasions are a significant component of global change, but they can also have negative impacts on native populations. Efficient management policies are needed to prevent the spread of invasive species in non-native areas while protecting native populations. Genetic variation analysis can help assess the genetic state, identify invasion pathways, determine management strategies, and identify populations requiring conservation measures.
BIODIVERSITY AND CONSERVATION
(2023)
Article
Virology
Andras Surjan, Eszter Fonagy, Edit Eszterbauer, Balazs Harrach, Andor Doszpoly
Summary: A novel papillomavirus, SgPV1, was discovered in farmed wels catfish in Hungary and its complete genome was identified through next-generation sequencing. This new fish papillomavirus shares similarities in gene structure with other fish papillomaviruses but differs from those found in higher vertebrates.
ARCHIVES OF VIROLOGY
(2021)
Article
Fisheries
Chloe Vagnon, Franck Cattaneo, Chloe Goulon, Jean Guillard, Victor Frossard
Summary: This study assessed the vulnerability of whitefish to European catfish invasion in peri-Alpine lakes and found that the catfish effectively consumed whitefish, with young individuals being the most vulnerable. These findings suggest that the European catfish may pose a growing threat to whitefish in the context of global change.
CANADIAN JOURNAL OF FISHERIES AND AQUATIC SCIENCES
(2022)
Article
Green & Sustainable Science & Technology
Renato Bacchetta, Andrea Marotta, Alessandro Nessi, Paolo Tremolada
Summary: The study revealed that the wels catfish has a severe impact on local fish communities in certain European basins and is preyed upon by the top predator Lutra lutra. By analyzing the catfish's bones, researchers were able to estimate the catfish's size and age, providing insights into the efficiency of predation by piscivorous species on allochthonous ones.
Article
Ecology
Westrelin Samuel, Bouletreau Stephanie, Santoul Frederic
Summary: Hypoxic events are increasingly severe in freshwater ecosystems due to human activities. In a study conducted in southeastern France, European catfish were found to withstand very low dissolved oxygen concentrations and increased their activity and visited a larger surface area during a hypoxic event. This ability, along with their high optimum temperature range, could give catfish a competitive advantage over other predatory species in the context of global change.
Article
Fisheries
K. Koprucu, S. Mise Yonar, S. Koprucu, Me Yonar
Summary: This study examined the effects of different stocking densities on the growth, oxidative stress, antioxidant enzymes, and hematological and immunological values in European catfish. The findings showed that high stocking densities can lead to oxidative stress in fish and have negative impacts on their health and growth.
AQUACULTURE INTERNATIONAL
(2023)
Article
Multidisciplinary Sciences
Kinga Szekvari, Zoltan Szabolcsi, Barbara Kutasy, Geza Hegedus, Eszter Virag
Summary: New complete mitogenome sequences of Silurus glanis from 4 samples were presented in this study, including male and female individuals from Hungary and Czech Republic. The complete mitochondria were determined using Illumina MiSeq platform, with de novo assembly resulting in one nod covering the total mitochondria in each sample. The mitochondrial genomes consisted of 13 protein-coding genes, 2 ribosomal RNA genes, 22 transfer RNA genes, and 1 control region.
Article
Environmental Sciences
Karlos R. de Moraes, Allan T. Souza, Daniel Barton, Petr Blabolil, Milan Muska, Marie Prchalova, Tomas Randak, Milan Riha, Mojmir Vasek, Jan Turek, Michal Tuser, Vladimir Zlabek, Jan Kubecka
Summary: Freshwater protected areas were created to combat the decline of world fauna and flora. An experiment in the Lipno reservoir in the Czech Republic showed that protected areas have a positive impact on fish communities, and factors such as bait attraction and migration may affect the effectiveness of these areas.
Article
Ecology
Marek Smejkal, Ondrej Dockal, Kiran Thomas, Chandani R. Verma, Pradeep Kumkar, Lukas Kalous
Summary: This study presents evidence of the Chinese sleeper's first documented occurrence in the Elbe River basin in Czechia. The fish was caught by a fisherman and shared on social media. It has been present in interconnected ponds and streams for ten years and may have spread over a larger area. Eradication measures are recommended to prevent further spread.
Correction
Ecology
Marek Smejkal, Ondrej Dockal, Kiran Thomas, Chandani R. R. Verma, Pradeep Kumkar, Lukas Kalous
Article
Marine & Freshwater Biology
Mahsa Hajisafarali, Jouni Taskinen, Antti P. Eloranta, Mikko Kiljunen
Summary: Chemical preservatives can alter stable isotope ratios in animal tissues. This study investigated the effects of ethanol preservation on delta C-13, delta N-15, and delta H-2 values in the freshwater pearl mussel (FPM). Ethanol preservation significantly increased delta C-13 values and had a tissue-dependent effect on delta H-2 values.
Article
Fisheries
Lenka Kajgrova, Borek Drozd, Jan Regenda, Vladislav Drastik, Lubos Kocvara, Tomas Kolarik, Jiri Peterka, Petr Blabolil
Summary: Invasive fish pose a threat to the ecological status and ecosystem services of ponds, making it crucial to accurately assess the composition of fish communities. This study compared three different sampling methods - electrofishing, fish-trapping, and throw-netting - to estimate the size distribution, density, and biomass of the invasive fish species, Pseudorasbora parva. The results showed that all three methods successfully detected P. parva, but there were significant differences in population characteristics estimates among the methods. Fish-trapping was found to be the most reliable and cost-effective method for estimating P. parva population characteristics in ponds, despite requiring more time for sampling. The study emphasizes the importance of selecting appropriate sampling gear for monitoring invasive fish in ponds.
JOURNAL OF FISH BIOLOGY
(2023)
Article
Environmental Sciences
Mojmir Vasek, Marek Brabec, Petr Blabolil, Martin Cech, Vladislav Drastik, Tomas Juza, Jan Kubecka, Milan Muska, Jiri Peterka, Marie Prchalova, Milan Riha, Josef Hejzlar
Summary: This study found that the 815N values in fish scales can serve as sensitive bioindicators of anthropogenic nitrogen inputs from catchment areas to freshwater ecosystems. Therefore, measuring the 815N values of fish scales could be an effective method for monitoring nitrogen pollution in aquatic environments.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Ecology
Antti P. Eloranta, Tommi Perala, Anna Kuparinen
Summary: Current research in ecology and ecosystem management emphasizes the need for a better understanding of the abiotic factors driving community dynamics, such as the impact of temperature on species interactions and biomass accumulation. Allometric trophic network (ATN) models, which simulate carbon transfer in trophic networks based on metabolic rates, offer a promising framework for studying consumer-resource interactions. However, these models usually overlook temporal changes in key abiotic drivers that affect consumer metabolism and producer growth. Here, we assess how changes in carrying capacity, light-dependent growth rate of producers, and temperature-dependent metabolic rate of consumers influence ATN model dynamics, specifically seasonal biomass accumulation and standing stock biomass of different trophic groups. Our findings highlight the importance of considering seasonality and adjusting abiotic parameters in ATN models to simulate temporal fluctuations in food-web dynamics and evaluate community-level responses to environmental changes.
ECOLOGY AND EVOLUTION
(2023)
Article
Ecology
Marek Smejkal, Daniel Barton, Petr Blabolil, Tomas Kolarik, Jan Kubecka, Zuzana Sajdlova, Allan T. Souza, Marek Brabec
Summary: By tagging and tracking 1702 individuals of Leuciscus aspius, researchers found that various environmental cues, including day number, water temperature, wind speed, and lunar phase, influenced the size of reproductive aggregations in freshwater fish. The study emphasizes the importance of obtaining diverse data sets to accurately interpret reproductive timing.
Article
Biodiversity Conservation
Petr Blabolil, Tomas Juza, Martin Cech, Jiri Peterka
Summary: This study suggests high mobility and flexibility of 0+ pikeperch, as well as their unexpected behavioral plasticity.
Article
Biodiversity Conservation
Anna Kuparinen, Silva Uusi-Heikkila, Tommi Perala, Fabio Ercoli, Antti P. P. Eloranta, Fabien Cremona, Peeter Noges, Alo Laas, Tiina Noges
Summary: Invasive species pose a threat to native populations and the structure of food webs. Using an ecological network model, we predict the impact of Amur sleeper invasion on a lake ecosystem. The establishment of Amur sleeper leads to a decrease in biomass of top predator fishes.
CONSERVATION SCIENCE AND PRACTICE
(2023)
Article
Biodiversity Conservation
Milan Riha, Marie Prchalova, Marek Brabec, Vladislav Drastik, Milan Muska, Michal Tuser, Daniel Barton, Petr Blabolil, Martin Cech, Jaroslava Frouzova, Michaela Holubova, Tomas Juza, Karlos R. Moraes, Ruben Rabaneda-Bueno, Zuzana Sajdlova, Allan T. Souza, Marek Smejkal, Mojmir Vasek, Lukas Vejrik, Ivana Vejrikova, Jiri Peterka, Jan Kubecka
Summary: Fish are important for aquatic ecosystems, and accurate assessments of their population variables are crucial for ecological applications. Gillnets are commonly used to assess fish populations, but there is no reliable model to calculate fish quantity from gillnet catches. This study calibrated gillnet catches using active methods and developed a tool to assess fish quantity from gillnet catches. The results showed a strong positive linear relationship between fish biomasses sampled with gillnets and active methods.
ECOLOGICAL INDICATORS
(2023)
Article
Environmental Sciences
Pankaj A. Gorule, Marek Smejkal, Sandip Tapkir, Yevdokiia Stepanyshyna, Vlastimil Stejskal, Maria Cristina Follesa, Alessandro Cau
Summary: This study reveals that anthropogenic polymeric particles can have detrimental effects on the behavior and movement skills of fish, and invasive species may have a higher tolerance towards pollutants. Fish exposed to polyethylene and tire wear particles showed bolder behavior and higher risk-taking, while invasive gibel carp exhibited better swimming performance.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Biology
Lukas Vejrik, Ivana Vejrikova, Petr Blabolil, Zuzana Sajdlova, Lubos Kocvara, Tomas Kolarik, Daniel Barton, Tomas Juza, Marek Smejkal, Jiri Peterka, Martin Cech
Summary: This study used an innovative and non-lethal approach to investigate niche widths and individual specialization based on isotopic signals. It analyzed four different body tissues with different isotopic half-lives and yielded crucial results on trophic interactions of fish. The study suggests that the observed trends may be applicable to other food webs with similar trophic positions, and highlights the impact of eutrophication on foraging behavior.
Article
Biodiversity Conservation
Kiran Thomas, Marek Brabec, Sandip Tapkir, Milan Gottwald, Daniel Barton, Marek Smejkal
Summary: Invasive alien species can cause significant loss of biodiversity. Early detection by citizens can serve as an indicator of invasion. This study found that invasive gibel carp were more easily detected through angling, while native crucian carp were more easily detected through trapping.
GLOBAL ECOLOGY AND CONSERVATION
(2023)
