Article
Fisheries
Zoran Marinovic, Jelena Lujic, Simona Susnik Bajec, Ida Djurdjevic, Ales Snoj, Gyorgy Hoitsy, Bela Urbanyi, Akos Horvath
Summary: The study found that rainbow trout is not a suitable recipient for all salmonid species, highlighting the importance of careful recipient selection in the development of surrogate production technology.
AQUACULTURE REPORTS
(2022)
Article
Biochemistry & Molecular Biology
Seungki Lee, Woo Young Bang, Hee-Sun Yang, Dae-Sung Lee, Ha Yeun Song
Summary: This study reveals that there is no effective cryopreservation technique for fish eggs and embryos, but freezing germ cells and transplanting them to recipients could be an alternative solution for long-term preservation of piscine genetic resources. The method shows potential for practical conservation projects in other teleost fish species and masu salmon by successfully generating normal offspring with a balanced sex ratio.
BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS
(2021)
Article
Fisheries
Victor Frossard, Chloe Vagnon, Christian Rossignon, Arnaud Caudron
Summary: Both brown trout and European grayling predominantly rely on aquatic resources, but brown trout have higher terrestrial resource use and trophic positions compared to grayling. Isotope analysis reveals that trout have a larger isotope niche than grayling, suggesting more opportunistic feeding behavior. The ontogenetic shift in trophic attributes results in increased isotopic niche partitioning between the two sympatric salmonid species.
ECOLOGY OF FRESHWATER FISH
(2021)
Article
Fisheries
Mariia Mokrina, Kazue Nagasawa, Makoto Kanamori, Masafumi Natsuike, Makoto Osada
Summary: This study aimed to understand germ cell renewal and differentiation in the Yesso scallop Mizuhopecten yessoensis throughout its reproductive cycle. The researchers identified a Yesso scallop vasa-like gene as a useful marker for immature germ cells and confirmed the presence of my-Vasa-positive immature germ cells throughout the reproductive cycle. The study also observed changes in germ cell number and composition associated with the gonadal maturation process, as well as an increase in my-Vasa-positive immature germ cells during certain periods of the year.
AQUACULTURE REPORTS
(2021)
Article
Biochemistry & Molecular Biology
Iraj Hashemzadeh Segherloo, Jorg Freyhof, Patrick Berrebi, Anne-Laure Ferchaud, Matthias Geiger, Jerome Laroche, Boris A. Levin, Eric Normandeau, Louis Bernatchez
Summary: Defining the taxonomic status of recently radiated groups poses challenges due to low phylogenetic signal, with the study on the brown trout species-complex revealing natural hybridization playing a key role in the origin of some putative species. The study suggests a multi-species taxonomy for brown trouts and the need for an integrative approach combining genomic, morphological, and ecological data for a comprehensive understanding of species complexes.
MOLECULAR PHYLOGENETICS AND EVOLUTION
(2021)
Article
Multidisciplinary Sciences
Natalia Kurhaluk, Halyna Tkachenko
Summary: This study investigated the effects of different development stages, survival forms, and sex on the functional stability of sea trout muscle tissue. It found sex-related relationships in antioxidant balance and muscle tissue degradation in the adult stage, as well as modifications in lysosomal functioning due to long-term environmental stress.
SCIENTIFIC REPORTS
(2021)
Article
Chemistry, Multidisciplinary
Marius Pedersen, Ahmed Mohammed
Summary: The study presents an automatic method for individual brown trout identification using deep convolutional architecture, achieving a precision of 94.6% and a recall of 74.3%.
APPLIED SCIENCES-BASEL
(2021)
Article
Chemistry, Multidisciplinary
Carmine Merola, Angelo Bisegna, Giovanni Angelozzi, Annamaria Conte, Maria Cesarina Abete, Caterina Stella, Sabina Pederiva, Caterina Faggio, Nicoletta Riganelli, Monia Perugini
Summary: This research investigated the concentrations of heavy metals and levels of vitellogenin in wild brown trout from two different rivers in the Abruzzi region of Italy. The results showed that the water quality in both rivers is suitable for brown trout life, and there were no significant differences in metal concentrations and VTG levels between the trout from the two rivers.
APPLIED SCIENCES-BASEL
(2021)
Article
Fisheries
Shuaijie Sun, Zhitong Wang, Dongdong Yuan, Mengke Ni, Huifen Xu, Wanliang Wang, Chi Zhang, Meiqun Chen, Lamu ZhaXi, Jianshe Zhou, Ming Li
Summary: This study used RT-qPCR technology to investigate the expression of eight candidate genes in different tissues, developmental stages, and under bacterial stress in Salmo trutta. The stability of these genes was ranked using comprehensive analysis software. The results showed that the expression of the hprt1 gene was relatively stable under different conditions.
AQUACULTURE REPORTS
(2022)
Article
Veterinary Sciences
Agata Jozefiak, Mateusz Rawski, Bartosz Kieronczyk, Damian Jozefiak, Jan Mazurkiewicz
Summary: This study evaluated the effects of two diets containing mealworm and superworm on the gut microbiome of sea trout fingerlings. The results showed that both insect meals did not have a significant impact on the growth and survival rate of sea trout. However, there were noticeable microbiome differences at lower taxonomic levels, particularly with the superworm meal.
BMC VETERINARY RESEARCH
(2023)
Article
Fisheries
Gasper Renko, Ida Djurdjevic, Simona Susnik Bajec
Summary: A novel protocol for the isolation of chromatophores from brown trout skin was developed based on previous research on zebrafish, enabling specific gene expression evaluation. The method is simple, fast, and ethical, allowing for monitoring at multiple time points, and should be effective for the majority of salmonid species due to similarities in skin morphology.
Review
Chemistry, Multidisciplinary
Edo D'Agaro, PierPaolo Gibertoni, Fabio Marroni, Maria Messina, Emilio Tibaldi, Stefano Esposito
Summary: Salmonid fish, particularly brown trout, are widely used as ecological and research models in the conservation genetics and genomics field. The Salmo trutta complex, which consists of multiple geographic forms, is found in Europe. Seven major evolutionary lineages have been identified based on mitochondrial DNA analysis. Populations in Italy and surrounding areas show high genetic diversity, and some lineages are protected due to their threatened status. Recent studies using traditional and next-generation sequencing techniques have revealed genetic differences between populations in different regions.
APPLIED SCIENCES-BASEL
(2022)
Article
Multidisciplinary Sciences
Rafal Bernas, Anna Was-Barcz, Mariann Arnyasi, Piotr Debowski, Grzegorz Radtke, Anita Pocwierz-Kotus, Patrick Berrebi
Summary: Selection, genetic drift, and gene flow affect genetic variation within populations and genetic differences among populations. In brown trout populations, disrupted river-segment connectivity is the main factor affecting population fragmentation. The study found a complex pattern of gene flow between resident and migratory brown trout, with isolated resident specimens sharing spawning grounds with sea trout downstream of impassable barriers.
SCIENTIFIC REPORTS
(2021)
Article
Agriculture, Dairy & Animal Science
Anna Monnolo, Maria Teresa Clausi, Filomena Del Piano, Mario Santoro, Maria Lorena Fiorentino, Lorella Barca, Giovanna Fusco, Barbara Degli Uberti, Luigia Ferrante, Raffaelina Mercogliano, Maria Carmela Ferrante
Summary: This study analyzed wild brown trout samples from a protected area in Southern Italy and found variations in the concentration of gastro-intestinal helminths and organochlorine pollutants among the samples. The results suggest that organochlorine pollutants may affect parasite survival and contribute to the understanding of the interaction among environment, parasites, and host.
Article
Fisheries
Lilianna Hoffmann, Mateusz Rawski, Ewa Pruszynska-Oszmalek, Pawel Kolodziejski, Jan Mazurkiewicz
Summary: The study showed that diets containing insect meal from the larval stage have a positive impact on the growth and survival rate of fish compared to control diets and diets containing insect meal from the imago stage.
AQUACULTURE REPORTS
(2021)
Article
Biochemistry & Molecular Biology
Bernadett Pataki, Berta Izabella Roberta, Gyongyi Gazsi, Bela Urbanyi, Timea Kollar, Akos Horvath
Summary: Age influences the sensitivity of zebrafish sperm to mercury exposure, with significant differences observed between different age groups.
FISH PHYSIOLOGY AND BIOCHEMISTRY
(2021)
Article
Environmental Sciences
Matjaz Novak, Spela Baebler, Bojana Zegura, Ana Rotter, Goran Gajski, Marko Geric, Vera Garaj-Vrhovac, Katalin Bakos, Zsolt Csenki, Robert Kovacs, Akos Horvath, Gyongyi Gazsi, Metka Filipic
Summary: Exposure of zebrafish to Imatinib mesylate (IM) did not impact survival or growth, with only a marginal increase in chromosomal damage. Whole-genome transcriptome analysis revealed a dose-dependent increase in differentially expressed genes, with a significantly higher number of deregulated genes in female fish compared to male.
Article
Biology
Zoran Marinovic, Ilija Scekic, Jelena Lujic, Bela Urbanyi, Akos Horvath
Summary: This study identified different subpopulations of sperm with distinct kinematic properties in common carp. The effects of cryopreservation and prolonged storage at different temperatures on sperm motility and subpopulation dynamics were examined, highlighting the importance of washing cryopreserved sperm with fresh extender to maintain favorable kinematic properties.
Article
Microbiology
Zoran Marinovic, Nada Tokodi, Damjana Drobac Backovic, Ilija Scekic, Nevena Kitanovic, Snezana B. Simic, Nevena B. Dordevic, Arpad Ferincz, Adam Staszny, Tamara Dulic, Jussi Meriluoto, Bela Urbanyi, Jelena Lujic, Zorica Svircev
Summary: Lake Balaton, the largest shallow lake in Central Europe, is affected by the Zala River. The Kis-Balaton Water Protection System (KBWPS) was constructed to improve water quality, but toxic cyanobacterial blooms were still observed. The KBWPS acts as a significant buffering zone, protecting the water quality of Lake Balaton. Regular monitoring of cyanobacteria and cyanotoxins in this ecosystem is crucial.
Article
Environmental Sciences
Damjana Drobac Backovic, Nada Tokodi, Zoran Marinovic, Jelena Lujic, Tamara Dulic, Snezana B. Simic, Nevena B. Dordevic, Nevena Kitanovic, Ilija Scekic, Bela Urbanyi, Jussi Meriluoto, Zorica Svircev
Summary: The study investigated the distribution of cyanobacteria and their toxins in the Fehervarcsurgo reservoir in Hungary. It found that cyanobacteria blooms occurred in July with the highest biomass recorded, potentially causing harm to the aquatic ecosystem.
ENVIRONMENTAL MONITORING AND ASSESSMENT
(2021)
Article
Fisheries
Patrick Berrebi, Akos Horvath, Andrea Splendiani, Stefan Palm, Rafal Bernas
Summary: This study analyzed the genetic structure of 27 brown trout hatchery strains from Europe and North America, revealing the dominance of the North Atlantic lineage in European and American hatcheries, with the presence of local strains from domesticated regional wild fish. Most hatchery strains showed high to very high genetic polymorphism, likely due to genetic admixture counteracting losses of diversity from genetic drift and domestication. This study highlights the importance of identifying the genetic composition of hatchery stocks and the need for caution when stocking a common stock across a species' geographical range to avoid reducing genetic diversity and local adaptation.
Article
Chemistry, Multidisciplinary
Zoran Marinovic, Branko Miljanovic, Bela Urbanyi, Jelena Lujic
Summary: This study evaluated histopathological alterations in fish gills as biomarkers to discriminate seasonal variations in water quality within the same aquatic ecosystem. Epithelial hyperplasia, mucous cell alterations, epithelial lifting, and necrosis were identified as the most significant contributors to seasonal differentiation.
APPLIED SCIENCES-BASEL
(2021)
Article
Biology
Jeno Kaldy, Eszter Patakine Varkonyi, Georgina Lea Fazekas, Zoltan Nagy, Zsuzsanna J. Sandor, Katalin Bogar, Gyula Kovacs, Mariann Molnar, Bence Lazar, Katalin Goda, Zsuzsanna Gyoengy, Zsuzsanna Ritter, Peter Nanasi, Akos Horvath, Uros Ljubobratovic
Summary: The study investigated the effects of different magnitudes of hydrostatic pressure on the ploidy of pikeperch larvae. It was found that 7000 PSI shock treatment resulted in diploid, triploid, and mosaic individuals, while 8000 and 9000 PSI treatments only led to triploid and mosaic individuals. The research also demonstrated the induction of haplo-triploid karyotype by hydrostatic pressure shock for the first time in teleost fish, supporting the suitability of pressure treatment for triploid induction in pikeperch.
Article
Fisheries
U. Ljubobratovic, F. Demeny, G. Peter, O. Malinovskyi, M. Kwiatkowski, B. Pataki, A. Horvath
Summary: The present study evaluated the effects of different thermal regimes and synthetic hormones on sperm and egg quality in indoor-reared pikeperch. The results showed that higher dosage of synthetic hormones and higher temperature had positive effects on pikeperch artificial reproduction.
AQUACULTURE REPORTS
(2022)
Article
Fisheries
Bernadett Pataki, Akos Horvath, Gergely Meszaros, Nevena Kitanovic, Andras Acs, Arpad Hegyi, Jozsef Molnar, Balazs Csorbai, Bela Urbanyi
Summary: Absorbance and computer-assisted sperm analysis (CASA) were used to assess the sperm concentration of common carp, and the effect of different concentrations on post-thaw sperm parameters and fertilizing capacity were tested. The results showed that both spectrophotometry and CASA are suitable for assessing common carp sperm concentration, and maximizing sperm concentration before cryopreservation results in higher fertilization.
AQUACULTURE REPORTS
(2022)
Article
Fisheries
Zoran Marinovic, Jelena Lujic, Simona Susnik Bajec, Ida Djurdjevic, Ales Snoj, Gyorgy Hoitsy, Bela Urbanyi, Akos Horvath
Summary: The study found that rainbow trout is not a suitable recipient for all salmonid species, highlighting the importance of careful recipient selection in the development of surrogate production technology.
AQUACULTURE REPORTS
(2022)
Article
Zoology
Marina Piria, Dinko Jelkic, Ana Gavrilovic, Akos Horvath, Balazs Kovacs, Reka E. Balogh, Ivan Spelic, Tena Radocaj, Lorenzo Vilizzi, Sinisa Ozimec, Andelko Opacak
Summary: A hybrid Clariobranchus, a cross between Clarias gariepinus and Heterobranchus sp., has been found in the River Danube in Croatia. This hybrid fish has gained attention in European aquaculture due to its fast growth and short time to reach market size. The record of this hybrid fish escaping into inland waters of Europe has not been found in the literature. This finding suggests that the hybrid fish may have escaped from an unprotected aquaculture system or open pond farm and there is a potential threat of its establishment in suitable environments.
JOURNAL OF VERTEBRATE BIOLOGY
(2022)
Article
Fisheries
Uros Ljubobratovic, Nevena Kitanovic, Sylvain Milla, Zoran Marinovic, Georgina Fazekas, Jelena Stanivuk, Zoltan Nagy, Akos Horvath
Summary: In vitro maturation techniques have the potential to predict latency time and improve fertilization outcomes in pikeperch artificial reproduction. The study found that artificial reproduction may have been performed prematurely for the pond-reared fish from the Czech Republic. Fish from the intensively cultured group from Hungary showed larger oocytes at the time of stimulation and higher embryo survival rates. There was a correlation between in vivo and in vitro latency times in the Hungarian group.
Meeting Abstract
Cell Biology
Nevena Kitanovic, Zoran Marinovic, Quyen Ngoc Nguyen, Tamas Mueller, Balazs Kovacs, Bela Urbanyi, Gergely Bernath, Akos Horvath
IN VITRO CELLULAR & DEVELOPMENTAL BIOLOGY-ANIMAL
(2021)