TY - JOUR AU - Blanes-García, Marta AU - Marinović, Zoran AU - Herranz-Jusdado, Juan Germán AU - Xie, Xuan AU - Ferrão, Leonor AU - Gallego, Victor AU - Pérez, Luz AU - Baloch, Abdul Rasheed AU - Horváth, Ákos AU - Pšenička, Martin AU - Asturiano, Juan F. AU - Morini, Marina TI - Characterization of potential spermatogonia biomarker genes in the European eel (Anguilla anguilla) JF - FISH PHYSIOLOGY AND BIOCHEMISTRY J2 - FISH PHYSIOL BIOCHEM PY - 2024 SN - 0920-1742 DO - 10.1007/s10695-024-01338-1 UR - https://m2.mtmt.hu/api/publication/34800758 ID - 34800758 AB - Identification of specific molecular markers for spermatogonial stem cells in teleost is crucial for enhancing the efficacy of reproductive biotechnologies in aquaculture, such as transplantation and surrogate production in fishes. Since it is not yet possible to distinguish spermatogonial stem cells of European eel ( Anguilla anguilla ) using specific molecular markers, we isolated spermatogonial cells from immature European eels to find these potential markers. We attempted this by studying three candidate genes: vasa , nanos2 , and dnd1 . Two vasa ( vasa1 and vasa2 ) genes, nanos2 , and dnd1 were identified, characterized, and studied in the muscle, testis, and isolated spermatogonia. Our results showed that vasa1 and vasa2 had the highest levels of expression when measured by qPCR. In situ hybridization and immunochemistry assays showed that the four genes were localized explicitly in type A spermatogonia. However, vasa1 and vasa2 exhibited stronger signals in the immature testicular tissue than the other two potential markers. According to this, vasa1 and vasa2 were found to be the most effective markers for spermatogonial cells in the European eel. LA - English DB - MTMT ER - TY - JOUR AU - Bokor, Zoltán AU - Urbányi, Béla TI - Tudományos Diákköri Konferencián vettek részt a MATE Akvakultúra és Környezetbiztonsági Intézet hallgatói JF - HALÁSZAT J2 - HALÁSZAT VL - 117 PY - 2024 IS - 1 SP - 33 EP - 35 PG - 3 SN - 0133-1922 UR - https://m2.mtmt.hu/api/publication/34789080 ID - 34789080 LA - Hungarian DB - MTMT ER - TY - JOUR AU - Horváth, Ákos TI - Ausztráliai tapasztalatok JF - HALÁSZAT J2 - HALÁSZAT VL - 117 PY - 2024 IS - 1 SP - 14 EP - 15 PG - 2 SN - 0133-1922 UR - https://m2.mtmt.hu/api/publication/34779466 ID - 34779466 LA - Hungarian DB - MTMT ER - TY - CONF AU - Kovács, Balázs AU - Réka, Enikő Balogh AU - Balázs, Csorbai AU - Julianna, Kobolák AU - Dániel, Péter AU - István, Lehoczky AU - Gyula, Kovács AU - Bogár, Katalin AU - Gyöngyvér, Fazekas AU - Aliz, Géczi AU - Milán, Varjú AU - Gábor, Szilágyi AU - Béla, Urbányi TI - Growth performance of different airbreathing (Clariidae) catfish lines T2 - 59th Croatian & 19th International Symposium on Agriculture : Book of Abstracts PB - University of Zagreb, Faculty of Agriculture C1 - Zagreb PY - 2024 SP - 156 UR - https://m2.mtmt.hu/api/publication/34778513 ID - 34778513 LA - English DB - MTMT ER - TY - JOUR AU - Hoitsy, Márton AU - Hoitsy, György AU - Gál, János AU - Ziszisz, Árisz AU - Tóth, Tamás AU - Sós, Endre AU - Sós‐Koroknai, Viktória AU - Jakab, Csaba AU - Petneházy, Örs AU - Donkó, Tamás AU - Molnár, Tamás Gergely AU - Marosán, Miklós TI - Rainbow trout ( Oncorhynchus mykiss , Walbaum 1792) adenocarcinoma investigation with various diagnostic imaging techniques JF - JOURNAL OF FISH DISEASES J2 - J FISH DIS PY - 2024 PG - 8 SN - 0140-7775 DO - 10.1111/jfd.13951 UR - https://m2.mtmt.hu/api/publication/34777486 ID - 34777486 AB - Diagnostic imaging techniques provide a new aspect of the ante‐mortem and post‐mortem diagnostics in fish medicine. Ultrasonography, computed tomography (CT) and magnetic resonance imaging (MRI) can provide more information about the internal organs and pathognomic lesions. The authors used diagnostic imaging techniques to evaluate and describe the neoplastic malformation in a 3‐year‐old female rainbow trout ( Oncorhynchus mykiss ). The fish was examined with Siemens Somatom Definition AS + CT scanner and Siemens Biograph mMR scanner. The animal was lethargic and showed anorectic signs and muscular dystrophy. During the post‐mortem investigation, histopathology and immunohistochemistry were also performed allowing us to identify the neoplasms. The results showed a large soft tissue mass in the first mid‐intestine segment, which proved to be an adenocarcinoma. This subsequently led to digestion problems and absorption disorders. Immunohistochemically, neoplastic cells of carcinoma revealed E‐cadherin and pancytokeratin positivity. This is the first study to report the use of MRI and CT for studying gastrointestinal adenocarcinoma in rainbow trout. LA - English DB - MTMT ER - TY - JOUR AU - Amichaud, Océane AU - Lafond, Thomas AU - Fazekas, Georgina AU - Kleiber, Aude AU - Kerneis, Thierry AU - Batard, Axel AU - Goardon, Lionel AU - Labbé, Laurent AU - Lambert, Sophie AU - Milla, Sylvain AU - Colson, Violaine TI - Air bubble curtain improves the welfare of captive rainbow trout fry and fingerlings JF - AQUACULTURE J2 - AQUACULTURE VL - 586 PY - 2024 SP - 740828 SN - 0044-8486 DO - 10.1016/j.aquaculture.2024.740828 UR - https://m2.mtmt.hu/api/publication/34767265 ID - 34767265 LA - English DB - MTMT ER - TY - JOUR AU - Prikler, Bence AU - Svigruha, Réka AU - Háhn, Judit AU - Harkai, Péter AU - Fodor, István AU - Kaszab, Edit AU - Kriszt, Balázs AU - Tóth, Gergő AU - Szabó, István AU - Csenki, Zsolt Imre AU - Bordós, Gábor AU - Micsinai, Adrienn AU - Nyirő-Fekete, Brigitta AU - Palotai, Zoltán AU - Lovász, Zsófia AU - Pirger, Zsolt AU - Szoboszlay, Sándor TI - Spatial Variations in Microplastics in the Largest Shallow Lake of Central Europe and Its Protecting Wetland Area JF - WATER J2 - WATER-SUI VL - 16 PY - 2024 IS - 7 SP - 1014 SN - 2073-4441 DO - 10.3390/w16071014 UR - https://m2.mtmt.hu/api/publication/34762975 ID - 34762975 AB - The concentration of microplastics (MPs) in two important Hungarian freshwater habitats was determined in the size range of 50 μm–1 mm. Lake Balaton (LB) is the largest shallow lake in Central Europe, with a significant role in recreation and tourism. Its main inflow, the Zala River, enters the lake through an artificially constructed wetland, the Kis-Balaton Water Protection System and its catchment area (KB), which helps preserve the water quality of the lake. From these two areas, 15 samples were taken with an in situ filtration sampling method. After preparation, the samples were analyzed automatically by FT-IR microscopy. All samples, from both areas, contained MPs; the dominant microplastic (MP) shape was the fragment, while the most frequently polymer types were polyethylene, polypropylene and alkyd. Small MPs were dominant in both areas; around 90% of the MPs were smaller than 500 μm. On average, LB contained more MPs (21.0 ± 12.5 MPs/m3) compared to the KB, which presented an average concentration of MPs of 7.8 ± 5.9 MPs/m3. In the examined areas, two potential MP sources were determined, i.e., treated wastewater and road traffic. The importance of tourism should also be further investigated. LA - English DB - MTMT ER - TY - JOUR AU - Kucska, Balázs AU - Quyen, Nguyen Ngoc AU - Ivánovics , Bence AU - Staszny, Ádám AU - Havasi, Máté AU - Vranovics, Károly AU - Griffitts, Jeffrey AU - Varga, Ádám AU - Urbányi, Béla AU - Müller, Tamás TI - Removal of dead fish eggs by Asellus aquaticus as a potential biological control in aquaculture JF - SCIENTIFIC REPORTS J2 - SCI REP VL - 14 PY - 2024 IS - 1 SN - 2045-2322 DO - 10.1038/s41598-024-57903-4 UR - https://m2.mtmt.hu/api/publication/34762533 ID - 34762533 AB - The objective of the present experimental study was to gain a better understanding of the foraging activity of Asellus aquaticus during fish egg incubation. A. aquaticus were introduced into experimental setups of dead eggs, viable eggs and hatched larvae of zebrafish ( Danio rerio ), a commonly used model organism. The amount of A. aquaticus and the duration of their exposure to the eggs significantly affected the proportion of consumed dead eggs in each experimental cycle. A. aquaticus belongs to the group of aquatic detritivores, and no predatory behavior was observed during the experiments. These crustaceans could distinguish between the dead eggs and those containing living embryos. Furthermore, zebrafish larvae remained unharmed by A. aquaticus , even in the absence of alternative food source. These findings underscore the potential sanitary role of these crustaceans in natural waters and offer new perspectives on their possible use as biological control organisms in aquaculture hatcheries. Additionally, our results suggest a potential application of A. aquaticus in combating pathogens by reducing the growth substrates for bacteria and fungi. LA - English DB - MTMT ER - TY - JOUR AU - Horváth, Ákos AU - Jug-Dujaković, Jurica AU - Radočaj, Tena AU - Barić, Oliver AU - Špelić, Ivan AU - Balogh, Réka Enikő AU - Lefler, Kinga Katalin AU - Kitanović, Nevena AU - Marinović, Zoran AU - Urbányi, Béla AU - Gavrilović, Ana TI - Cryopreservation of European flat oyster (Ostrea edulis) larvae using a controlled-rate freezer JF - AQUACULTURE J2 - AQUACULTURE VL - 587 PY - 2024 SP - 740887 SN - 0044-8486 DO - 10.1016/j.aquaculture.2024.740887 UR - https://m2.mtmt.hu/api/publication/34762462 ID - 34762462 LA - English DB - MTMT ER - TY - JOUR AU - Bánó, Bálint AU - Bolotovskiy, Aleksey AU - Levin, Boris AU - Mattox, George M. T. AU - Cetra, Mauricio AU - Czeglédi, István AU - Takács, Péter TI - Scale morphology is a promising, additional tool for exploring the taxonomy and ecology of freshwater fishes JF - FISH AND FISHERIES J2 - FISH FISH VL - 00 PY - 2024 SP - 1 EP - 20 PG - 20 SN - 1467-2960 DO - 10.1111/faf.12826 UR - https://m2.mtmt.hu/api/publication/34760913 ID - 34760913 AB - It has long been recognized that presence–absence, localisation, size, number and shape of fish scales can be important taxonomic features. Although there are some notes on the relationship between scale morphology and ecological needs, in the absence of a sufficiently large and detailed database, the morphological variability of fish scales and the factors responsible for this variability have not yet been explored in detail. For this reason, a database—which contains the shape and relative size data of 193 freshwater fish taxa of 14 orders, originated from five biogeographic realms—has been built. Database analyses showed that both the scale shape and relative size are proper taxonomic indicators. They can be used to separate higher taxonomic categories (e.g., orders), and by the simultaneous analysis of shape and size scale morphology, we showed increased sensitivity for species‐level detachments. Our results suggest that while both the shape and the size of the fish scales are genetically determined, they are also useful descriptors of the niche segregation (habitat use, flow preference) of close relative species. Scale morphology is a promising additional tool to specify the environmental preferences of lesser known or close relative recent and extinct fish species. And also can be of great help in such cases when only the scales are available for taxonomic identification, for example, in the research field of archaeology and palaeontology. LA - English DB - MTMT ER -