Data on prevalence and current distribution of the cestode Nippotaenia mogurndae Yamaguti and Miyata, 1940 (Nippotaeniidea) in Slovakia, are provided. A total of 163 fish from 8 localities of different types in the Tisa River basin were... more
Data on prevalence and current distribution of the cestode Nippotaenia mogurndae Yamaguti and Miyata, 1940 (Nippotaeniidea) in Slovakia, are provided. A total of 163 fish from 8 localities of different types in the Tisa River basin were infected with N. mogurndae. The mean intensity of infection was 1.8 with a maximum of 5 tapeworms. The expansion of the distribution of the cestode corresponds well with the spreading of its host, the invasive fish Amur sleeper Perccottus glenii Dybowski, 1877. The Spearmann correlation coefficient was used to test the relationship between the intensity of infection and standard length of the fish (r = 0.36; n = 163; P < 0.05), condition coefficient of the fish (r = 0.22; n = 115; P < 0.05) and season (r = −0.37; n = 355; P < 0.05). A significant correlation was confirmed for each pair of variables. There is a statistically significant difference between the prevalence of the cestode in two functional size groups (t = 3.28; n = 163; P < 0...
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Loaches of the genus Sabanejewia are model organisms for many ichthyologic studies focusing on morphological and colour variation. The bright lateral spots—a part of the mimicry of this fish—cause a taxonomic puzzle. Common practice is... more
Loaches of the genus Sabanejewia are model organisms for many ichthyologic studies focusing on morphological and colour variation. The bright lateral spots—a part of the mimicry of this fish—cause a taxonomic puzzle. Common practice is that morphometric and molecular studies lack habitat assessments of species originating from different environments. In this study, we analysed body shape and colour variation within two species of Sabanejewia in order to reveal whether they are more affected by phylogeny or environmental conditions. The environmental parameters were obtained using satellite mapping tools, body shape using geometric morphometry, and the molecular identification of specimens using an analysis of mitochondrial DNA (sequence of the cytochrome b gene). Generalized linear mixed models were used for the analysis of lateral spot numbers, and principal components analysis to describe the changes in landmark position defined by the permutation tests. Results show a significant...
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Between 2007 and 2012 altogether 14 samplings in 13 locations within the Rimava river catchment area have been performed using electrofishing device. Within the Rimava river and its five selected tributaries (Gortva, Rimavica, Barca,... more
Between 2007 and 2012 altogether 14 samplings in 13 locations within the Rimava river catchment area have been performed using electrofishing device. Within the Rimava river and its five selected tributaries (Gortva, Rimavica, Barca, Macaci brook, Dechtarsky brook) altogether 22 fish species belonging to five families (Balitoridae, Cobitidae, Cyprinidae, Percidae, Salmonidae) were recorded. Bitterling (Rhodeus amarus), chub (Squalius cephalus) and spirlin (Alburnoides bipunctatus) belonged to eudominant species, while Stone loach (Barbatula barbatula) and Danubian spined loach (Cobitis elongatoides) were the most frequently occurred species within the study sites. The fish assemblage composition, relative abundance, eco‐ethological requirements, threat categories and conservation status of occurring species was evaluated. Our survey focused especially on the verification of occurrence of protected and threatened species. Given the lack of current data on the fish assemblage composition of the Rimava river catchment, the data obtained may serve as the basis for local nature conservation authorities administrating within the issued territory. Altogether 8 species of the European importance and one species of the national importance were recorded within the study area, what supports the idea of designation of separate Natura 2000 site (SCI – Site of Community Importance) encompassing the Rimava river and certain tributaries.
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This study identifies of populations of the genus Cobitis from the Slovakian Tisza drainage area, using karyotype, enzyme electrophoresis and flow cytometry. Pure diploid populations of Cobitis elongatoides were found in drainage basins... more
This study identifies of populations of the genus Cobitis from the Slovakian Tisza drainage area, using karyotype, enzyme electrophoresis and flow cytometry. Pure diploid populations of Cobitis elongatoides were found in drainage basins of the Hornád, Slaná and Bodva rivers (5 populations). Species identifity was proven by analysis of genome and allelic composition. A large number of males was in these populations (42.5-60%). The drainage basin of the Bodrog river (3 populations), harbored so-called hybrid diploid-polyploid complexes with basic composition C. 2 elongatoides x 1 tanaitica. If diploid specimens were found, they belonged to C. elongatoides. Apart from triploids, diploids were rarely found in the Ondava and Latorica rivers. In the Bodrog River, tetraploids (C. 3 elongatoides x 1 tanaitica were seldom found beside triploid and diploid individuals. The percentage of males in hybrid complexes was very low (up to 16.2 %).
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An ichthyological survey was conducted in September 2011 at two stream profiles of planned construction of small hydroelectric power plants on the Torysa River – Vysna Hutka and Zdoba. Our main objective was to... more
An ichthyological survey was conducted in September 2011 at two stream profiles of planned construction of small hydroelectric power plants on the Torysa River – Vysna Hutka and Zdoba. Our main objective was to investigate the species composition of ichthyofauna prior to the planned construction of hydropower plants and determine the potential impacts on fish assemblages. In Vysna Hutka 11 species and in Zdoba 14 species were recorded. At the first site (Vysna Hutka) bleak (Alburnoides bipunctatus) and chub (Squalius cephalus) were dominant species. At the second site (Zdoba), common dace (Leuciscus leuciscus), gudgeon (Gobio gobio) and bitterling (Rhodeus amarus) were dominant. Kivonat 2011. szeptember folyaman a Torysa (Tarca) folyo ket szakaszan, melyeken kis vizerőművek epiteset tervezik – Vysna Hutka es Zdoba tersegeben – mertuk fel a halallomanyt. A mintaveteleknek az volt a celja, hogy vizsgaljuk a halfauna fajok szerinti osszetetelet es allapotat a tervezett kis vizerőművek megepitese előtt, valamint hogy meghatarozzuk azok potencialis hatasat a folyo erintett szakaszain jelenleg elő halkozossegekre. Osszesen 11 halfajt jegyeztuk fel az első (Vysna Hutka) mintateruleten es 14 halfajt a masodik (Zdoba) mintateruleten. Az első mintateruleten a sujtasos kusz (Alburnoides bipunctatus) es a fejes domolyko (Squalius cephalus) voltak dominans fajok. A masodik mintateruleten a nyuldomolyko (Leuciscus leuciscus), a fenekjaro kullő (Gobio gobio) es a szivarvanyos okle (Rhodeus amarus) voltak dominans fajok
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The North American catfish, the black bullhead Ameiurus melas, is recorded for the first time in Poland. The origin of these fish is not clear, but their presence may be associated with unregulated introductions by anglers.
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Ameiurus melas (Rafinesque, 1820) is an invasive species, which came to Slovakia in the second half of the nineties through Bodrog basin probably from Hungary, where it was imported from Italy in the eighties. Black bullhead has... more
Ameiurus melas (Rafinesque, 1820) is an invasive species, which came to Slovakia in the second half of the nineties through Bodrog basin probably from Hungary, where it was imported from Italy in the eighties. Black bullhead has properties which make it well suited to conditions in new settled habitats (particularly wide foodrange, high capacity of reproduction and parental care) and probably contribute to its invasive spread in North America and Europe. In 2007 we examined a total of 40 specimens of Black bullhead females from four sites in eastern Slovakia in order to determine absolute, relative fecundity and fertility index. Obtained data we compared with the authors results from the natural areal of A. melas and new settled habitats. To determine fertility we used the gravimetric method. The average absolute fecundity of Ameiurus melas ranged from 4472 to 9171 eggs. Our results indicate that black bullhead has a higher average relative and absolute fertility as was published in...
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Argulussp., commonly referred to as fish lice, are crustacean ectoparasites of fishes. The hematophagous parasites attach to and feed off the integument of their hosts. Outbreaks of epizootics have been reported worldwide, causing mass... more
Argulussp., commonly referred to as fish lice, are crustacean ectoparasites of fishes. The hematophagous parasites attach to and feed off the integument of their hosts. Outbreaks of epizootics have been reported worldwide, causing mass mortalities and having serious economic implications for fish farms and culture efforts.Argulusfish lice may also serve as vectors of infectious diseases and as intermediate hosts of other parasites. Two native European species,A. foliaceusandA. coregoni, as well as the invasive Japanese fish louseA. japonicus,have previously been recorded in Slovakia. This study investigated samples collected at fish farms and culture sites of Common carp (Cyprinus carpioL.), Pike-perch (Sander luciopercaL.) and Brook trout (Salvelinus fontinalisM.) in Eastern Slovakia, as well as samples collected from live fish imported to the Slovak Republic. A quantitative description of the ofArgulussp. was recorded from each locality. Samples from Common carp were identified as...
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We are observed lake localities and obtained scale of physical and chemical properties and fauna composition. In total there were accounte 35 taxa of zooplankton (16 Rotatoria, 12 Cladocera, 7 Copepoda) and 27 taxa of net-macrozoobenthos... more
We are observed lake localities and obtained scale of physical and chemical properties and fauna composition. In total there were accounte 35 taxa of zooplankton (16 Rotatoria, 12 Cladocera, 7 Copepoda) and 27 taxa of net-macrozoobenthos and moe than 80 species of protisto-micro-and mesozoobenthos. Some of species are new for Ukraine (Cephalodella gobio, Cephalodella dentata.). Doteraz chýbajú údaje o faune Svidoveckýchjazier, ktoré sa tešia vel'kej popularitě návštevníkov a podl'a dostupných materiálov neboli predmetom kompletného vý-skumu. V čase letnej sezóny sú jazerá vystavené značnému antropogénnemu tlaku turistov i hospodářských zvierat. Eutrofizačne vplyvy sú evidentně, hlavně tam, kde sa prirahlé okolie využívá na pasenie hospodářských zvierat. Krátké zmienky o chemizme karpatských jazier nachádzame v prácach Muller a o protis-tobentose i mikrozoobentose v prácach A. Kovalchuk, aN. Kovalchuk (1999a,b 2002). Početnejšie práce sú známe zo slovenskej časti Karpat, napr...
This study identifies of populations of the genus Cobitis from the Slovakian Tisza drainage area, using karyotype, enzyme electrophoresis and flow cytometry. Pure diploid populations of Cobitis elongatoides were found in drainage basins... more
This study identifies of populations of the genus Cobitis from the Slovakian Tisza drainage area, using karyotype, enzyme electrophoresis and flow cytometry. Pure diploid populations of Cobitis elongatoides were found in drainage basins of the Hornád, Slaná and Bodva rivers (5 populations). Species identifity was proven by analysis of genome and allelic composition. A large number of males was in these populations (42.5-60%). The drainage basin of the Bodrog river (3 populations), harbored so-called hybrid diploid-polyploid complexes with basic composition C. 2 elongatoides x 1 tanaitica. If diploid specimens were found, they belonged to C. elongatoides. Apart from triploids, diploids were rarely found in the Ondava and Latorica rivers. In the Bodrog River, tetraploids (C. 3 elongatoides x 1 tanaitica were seldom found beside triploid and diploid individuals. The percentage of males in hybrid complexes was very low (up to 16.2 %).
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Between 2007 and 2012 altogether 14 samplings in 13 locations within the Rimava river catchment area have been performed using electrofishing device. Within the Rimava river and its five selected tributaries (Gortva, Rimavica, Barca,... more
Between 2007 and 2012 altogether 14 samplings in 13 locations within the Rimava river catchment area have been performed using electrofishing device. Within the Rimava river and its five selected tributaries (Gortva, Rimavica, Barca, Macaci brook, Dechtarsky brook) altogether 22 fish species belonging to five families (Balitoridae, Cobitidae, Cyprinidae, Percidae, Salmonidae) were recorded. Bitterling (Rhodeus amarus), chub (Squalius cephalus) and spirlin (Alburnoides bipunctatus) belonged to eudominant species, while Stone loach (Barbatula barbatula) and Danubian spined loach (Cobitis elongatoides) were the most frequently occurred species within the study sites. The fish assemblage composition, relative abundance, eco‐ethological requirements, threat categories and conservation status of occurring species was evaluated. Our survey focused especially on the verification of occurrence of protected and threatened species. Given the lack of current data on the fish assemblage composition of the Rimava river catchment, the data obtained may serve as the basis for local nature conservation authorities administrating within the issued territory. Altogether 8 species of the European importance and one species of the national importance were recorded within the study area, what supports the idea of designation of separate Natura 2000 site (SCI – Site of Community Importance) encompassing the Rimava river and certain tributaries.
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The North American catfish, the black bullhead Ameiurus melas, is recorded for the first time in Poland. The origin of these fish is not clear, but their presence may be associated with unregulated introductions by anglers.
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Throughout their history humans “tamed” not only the Danube River basin land, but also the river and its associated wetlands, drastically influencing their characteristic habitats, associations, communities, and species. One of these... more
Throughout their history humans “tamed” not only the Danube River basin land, but also the river and its associated wetlands, drastically influencing their characteristic habitats, associations, communities, and species. One of these flagship endemic fish species in this respect is the European mudminnow (Umbra krameri Walbaum, 1792), influenced by Danube Basin geography, history, politics, and ecology. A study about this European community concern species in the context of long term human impact on its specific habitats, with potential synergic negative effects of climate change, was treated as highly needed, in an international researchers group initiative to support the efforts to provide hope for preserving this fish species and its ecosystems, and brought it back from the brink of extinction. All the characteristic inventoried wetlands which were or some of them still are natural, semi-natural, or accidental anthropogenic habitats, reveal an accentuated diminishing trend of thi...
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During studies of ichthyofauna of Transcarpathian Ukraine 46 species and 14 families were caught. It is the result of high diversity of topic conditions and low human impacts. Comparison of the results of present studies with former data... more
During studies of ichthyofauna of Transcarpathian Ukraine 46 species and 14 families were caught. It is the result of high diversity of topic conditions and low human impacts. Comparison of the results of present studies with former data revealed that the species composition of ichthyofauna was not changes. Only negative influences of ilegal fishing were recorded. Key words: species richness, mountain and suhmountain rivers, natural assets, indigenous and nonindigenous species. Prirodné podmienky Zakarpatia, nízká miera antropickej záťaže, vyplývajúca z charakteru osídlenia a stupňa industrializácie, vytvára předpoklady pře výskyt relativné póvodných ichtyoccnóz. Rybám tejto oblasti věnoval pozornost' známy ichtyolog Vladykov (1926, 1931), neskór sa ichtyofaune Zakarpatia věnovali Kol'jusev (l 949,1959) Vlasová (l 956,1959) z Užhorodskej národnej univerzity a tiež Danko (1957), Poliščuk a Harasevič (1986) a i.. V posledných desiatich rokoch zhmul poznatky o ichtyofaune Zakar...
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Ichtyological investigations were performed on 9 partial localities of protected territories Natura 2000 includes: Hnilec, Hornád, Chotčianka, Oľka, Oľšava, Ondava, Svinka, Topľa and Torysa Rivers, during year 2013. Nine catches were... more
Ichtyological investigations were performed on 9 partial localities of protected territories Natura 2000 includes: Hnilec, Hornád, Chotčianka, Oľka, Oľšava, Ondava, Svinka, Topľa and Torysa Rivers, during year 2013. Nine catches were performed twice per year. Overall 2666 specimens of fishes were caught. Total value of fishes, were greater in summer season (1686 specimens) in comparison with autumnal catches (980 specimens). The sample consisted of the 25 fish species from 7 families and one species of lamprey (Eudontomy-zon danfordi). The occurrence of eleven Natura 2000 monitored species (E.
In July 2005 the fish communities inhabiting 6 artificial pools were investigated in the floodplain along the lower reaches of the River Latorica between Beša and Čičarovce villages. The pools were rather shallow with submersed... more
In July 2005 the fish communities inhabiting 6 artificial pools were investigated in the floodplain along the lower reaches of the River Latorica between Beša and Čičarovce villages. The pools were rather shallow with submersed macrophytes. The macroinvertebrate communities represent the good trophical base for the most of fish species. In the habitats under study, evidence has been obtained of the occurrence of 18 fish species, belonging to 8 families. Rutilus rutilus (Linnaeus, 1758), Scardinius erythrophthalmus (Lin- naeus, 1758), Esox lucius Linnaeus, 1758 and Perccottus glenii Dybowski, 1877 obtained the highest level of frequency. These species and Misgurnus fossilis (Linnaeus, 1758), Aspius aspius (Linnaeus, 1758), and Perca fluviatilis Linnaeus, 1758 were evaluated as the characteristic component of fish com- munities inhabiting aquatic habitats in the floodplain along the lower reaches of the River Latorica. The previous keystone species Ameiurus nebulosus (Lesueur, 1819) h...
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During studies of ichthyofauna of Transcarpathian Ukraine 46 species and 14 families were caught. It is the result of high diversity of topic conditions and low human impacts. Comparison of the results of present studies with former data... more
During studies of ichthyofauna of Transcarpathian Ukraine 46 species and 14 families were caught. It is the result of high diversity of topic conditions and low human impacts. Comparison of the results of present studies with former data revealed that the species composition of ichthyofauna was not changes. Only negative influences of ilegal fishing were recorded. Key words: species richness, mountain and suhmountain rivers, natural assets, indigenous and nonindigenous species. Prirodné podmienky Zakarpatia, nízká miera antropickej záťaže, vyplývajúca z charakteru osídlenia a stupňa industrializácie, vytvára předpoklady pře výskyt relativné póvodných ichtyoccnóz. Rybám tejto oblasti věnoval pozornost' známy ichtyolog Vladykov (1926, 1931), neskór sa ichtyofaune Zakarpatia věnovali Kol'jusev (l 949,1959) Vlasová (l 956,1959) z Užhorodskej národnej univerzity a tiež Danko (1957), Poliščuk a Harasevič (1986) a i.. V posledných desiatich rokoch zhmul poznatky o ichtyofaune Zakar...
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During studies of ichthyofauna of Transcarpathian Ukraine 46 species and 14 families were caught. It is the result of high diversity of topic conditions and low human impacts. Comparison of the results of present studies with former data... more
During studies of ichthyofauna of Transcarpathian Ukraine 46 species and 14 families were caught. It is the result of high diversity of topic conditions and low human impacts. Comparison of the results of present studies with former data revealed that the species composition of ichthyofauna was not changes. Only negative influences of ilegal fishing were recorded. Key words: species richness, mountain and suhmountain rivers, natural assets, indigenous and nonindigenous species. Prirodné podmienky Zakarpatia, nízká miera antropickej záťaže, vyplývajúca z charakteru osídlenia a stupňa industrializácie, vytvára předpoklady pře výskyt relativné póvodných ichtyoccnóz. Rybám tejto oblasti věnoval pozornost' známy ichtyolog Vladykov (1926, 1931), neskór sa ichtyofaune Zakarpatia věnovali Kol'jusev (l 949,1959) Vlasová (l 956,1959) z Užhorodskej národnej univerzity a tiež Danko (1957), Poliščuk a Harasevič (1986) a i.. V posledných desiatich rokoch zhmul poznatky o ichtyofaune Zakar...
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Freshwater fishes recorded in the territory of Slovakia include 95 fish species. As many as one third of these are allochthonous fish species belonging to 14 families, among which several have not occurred in Slovakia recently.... more
Freshwater fishes recorded in the territory of Slovakia include 95 fish species. As many as one third of these are allochthonous fish species belonging to 14 families, among which several have not occurred in Slovakia recently. Historically, there were three main periods of introduction: the first is the beginning of the 20th century, the second includes two decades between 1955 and 1975 and the third period is from the year 1990 up to the present time. The origins of the exotic species seen in Slovakia are the four continents — Africa (3), North America (7), Central America (3), and Asia (13) and ten of them are from different regions in Europe. The purpose of intentional introductions of non-native species was to occupy vacant ecological niches in the ecosystems reshaped by human activities, fish stocking, angling or fish farming. Some of these species spread from their original ranges or they penetrated spontaneously from the adjacent countries via the river network system. At th...
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In July 2005 the fish communities inhabiting 6 artificial pools were investigated in the floodplain along the lower reaches of the River Latorica between Beša and Čičarovce villages. The pools were rather shallow with submersed... more
In July 2005 the fish communities inhabiting 6 artificial pools were investigated in the floodplain along the lower reaches of the River Latorica between Beša and Čičarovce villages. The pools were rather shallow with submersed macrophytes. The macroinvertebrate communities represent the good trophical base for the most of fish species. In the habitats under study, evidence has been obtained of the occurrence of 18 fish species, belonging to 8 families. Rutilus rutilus (Linnaeus, 1758), Scardinius erythrophthalmus (Lin- naeus, 1758), Esox lucius Linnaeus, 1758 and Perccottus glenii Dybowski, 1877 obtained the highest level of frequency. These species and Misgurnus fossilis (Linnaeus, 1758), Aspius aspius (Linnaeus, 1758), and Perca fluviatilis Linnaeus, 1758 were evaluated as the characteristic component of fish com- munities inhabiting aquatic habitats in the floodplain along the lower reaches of the River Latorica. The previous keystone species Ameiurus nebulosus (Lesueur, 1819) h...
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In July 2005 the fish communities inhabiting 6 artificial pools were investigated in the floodplain along the lower reaches of the River Latorica between Beša and Čičarovce villages. The pools were rather shallow with submersed... more
In July 2005 the fish communities inhabiting 6 artificial pools were investigated in the floodplain along the lower reaches of the River Latorica between Beša and Čičarovce villages. The pools were rather shallow with submersed macrophytes. The macroinvertebrate communities represent the good trophical base for the most of fish species. In the habitats under study, evidence has been obtained of the occurrence of 18 fish species, belonging to 8 families. Rutilus rutilus (Linnaeus, 1758), Scardinius erythrophthalmus (Lin- naeus, 1758), Esox lucius Linnaeus, 1758 and Perccottus glenii Dybowski, 1877 obtained the highest level of frequency. These species and Misgurnus fossilis (Linnaeus, 1758), Aspius aspius (Linnaeus, 1758), and Perca fluviatilis Linnaeus, 1758 were evaluated as the characteristic component of fish com- munities inhabiting aquatic habitats in the floodplain along the lower reaches of the River Latorica. The previous keystone species Ameiurus nebulosus (Lesueur, 1819) h...
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Freshwater fishes recorded in the territory of Slovakia include 95 fish species. As many as one third of these are allochthonous fish species belonging to 14 families, among which several have not occurred in Slovakia recently.... more
Freshwater fishes recorded in the territory of Slovakia include 95 fish species. As many as one third of these are allochthonous fish species belonging to 14 families, among which several have not occurred in Slovakia recently. Historically, there were three main periods of introduction: the first is the beginning of the 20th century, the second includes two decades between 1955 and 1975 and the third period is from the year 1990 up to the present time. The origins of the exotic species seen in Slovakia are the four continents — Africa (3), North America (7), Central America (3), and Asia (13) and ten of them are from different regions in Europe. The purpose of intentional introductions of non-native species was to occupy vacant ecological niches in the ecosystems reshaped by human activities, fish stocking, angling or fish farming. Some of these species spread from their original ranges or they penetrated spontaneously from the adjacent countries via the river network system. At th...
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Freshwater fishes recorded in the territory of Slovakia include 95 fish species. As many as one third of these are allochthonous fish species belonging to 14 families, among which several have not occurred in Slovakia recently.... more
Freshwater fishes recorded in the territory of Slovakia include 95 fish species. As many as one third of these are allochthonous fish species belonging to 14 families, among which several have not occurred in Slovakia recently. Historically, there were three main periods of introduction: the first is the beginning of the 20th century, the second includes two decades between 1955 and 1975 and the third period is from the year 1990 up to the present time. The origins of the exotic species seen in Slovakia are the four continents — Africa (3), North America (7), Central America (3), and Asia (13) and ten of them are from different regions in Europe. The purpose of intentional introductions of non-native species was to occupy vacant ecological niches in the ecosystems reshaped by human activities, fish stocking, angling or fish farming. Some of these species spread from their original ranges or they penetrated spontaneously from the adjacent countries via the river network system. At th...
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Six non-native invasive fish species from the Slovak part of the Tisa River basin, namely Carassius gibelio, Pseudorasbora parva, Ameiurus melas, A. nebulosus, Lepomis gibbosus, Perccottus glenii, and three gobiid species from the Danube... more
Six non-native invasive fish species from the Slovak part of the Tisa River basin, namely Carassius gibelio, Pseudorasbora parva, Ameiurus melas, A. nebulosus, Lepomis gibbosus, Perccottus glenii, and three gobiid species from the Danube River, namely Neogobius melanostomus, N. fluviatilis and N. kessleri, were investigated for endohelminth parasites. The expanding Asian cestode Nippotaenia mogurndae (syn. Amurotaenia perccotti) (Nippotaeniidea) has been introduced to Europe with its invasive host P. glenii. Pumpkinseed, Lepomis gibbosus, is a new definitive host of Proteocephalus percae and it is reported as the second intermediate host of the bothriocephalidean cestode Triaenophorus nodulosus in Slovakia.
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Six non-native invasive fish species from the Slovak part of the Tisa River basin, namely Carassius gibelio, Pseudorasbora parva, Ameiurus melas, A. nebulosus, Lepomis gibbosus, Perccottus glenii, and three gobiid species from the Danube... more
Six non-native invasive fish species from the Slovak part of the Tisa River basin, namely Carassius gibelio, Pseudorasbora parva, Ameiurus melas, A. nebulosus, Lepomis gibbosus, Perccottus glenii, and three gobiid species from the Danube River, namely Neogobius melanostomus, N. fluviatilis and N. kessleri, were investigated for endohelminth parasites. The expanding Asian cestode Nippotaenia mogurndae (syn. Amurotaenia perccotti) (Nippotaeniidea) has been introduced to Europe with its invasive host P. glenii. Pumpkinseed, Lepomis gibbosus, is a new definitive host of Proteocephalus percae and it is reported as the second intermediate host of the bothriocephalidean cestode Triaenophorus nodulosus in Slovakia.
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Six non-native invasive fish species from the Slovak part of the Tisa River basin, namely Carassius gibelio, Pseudorasbora parva, Ameiurus melas, A. nebulosus, Lepomis gibbosus, Perccottus glenii, and three gobiid species from the Danube... more
Six non-native invasive fish species from the Slovak part of the Tisa River basin, namely Carassius gibelio, Pseudorasbora parva, Ameiurus melas, A. nebulosus, Lepomis gibbosus, Perccottus glenii, and three gobiid species from the Danube River, namely Neogobius melanostomus, N. fluviatilis and N. kessleri, were investigated for endohelminth parasites. The expanding Asian cestode Nippotaenia mogurndae (syn. Amurotaenia perccotti) (Nippotaeniidea) has been introduced to Europe with its invasive host P. glenii. Pumpkinseed, Lepomis gibbosus, is a new definitive host of Proteocephalus percae and it is reported as the second intermediate host of the bothriocephalidean cestode Triaenophorus nodulosus in Slovakia.
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During studies of ichthyofauna of Transcarpathian Ukraine 46 species and 14 families were caught. It is the result of high diversity of topic conditions and low human impacts. Comparison of the results of present studies with former data... more
During studies of ichthyofauna of Transcarpathian Ukraine 46 species and 14 families were caught. It is the result of high diversity of topic conditions and low human impacts. Comparison of the results of present studies with former data revealed that the species composition of ichthyofauna was not changes. Only negative influences of ilegal fishing were recorded. Key words: species richness, mountain and suhmountain rivers, natural assets, indigenous and nonindigenous species. Prirodné podmienky Zakarpatia, nízká miera antropickej záťaže, vyplývajúca z charakteru osídlenia a stupňa industrializácie, vytvára předpoklady pře výskyt relativné póvodných ichtyoccnóz. Rybám tejto oblasti věnoval pozornost' známy ichtyolog Vladykov (1926, 1931), neskór sa ichtyofaune Zakarpatia věnovali Kol'jusev (l 949,1959) Vlasová (l 956,1959) z Užhorodskej národnej univerzity a tiež Danko (1957), Poliščuk a Harasevič (1986) a i.. V posledných desiatich rokoch zhmul poznatky o ichtyofaune Zakar...
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In July 2005 the fish communities inhabiting 6 artificial pools were investigated in the floodplain along the lower reaches of the River Latorica between Beša and Čičarovce villages. The pools were rather shallow with submersed... more
In July 2005 the fish communities inhabiting 6 artificial pools were investigated in the floodplain along the lower reaches of the River Latorica between Beša and Čičarovce villages. The pools were rather shallow with submersed macrophytes. The macroinvertebrate communities represent the good trophical base for the most of fish species. In the habitats under study, evidence has been obtained of the occurrence of 18 fish species, belonging to 8 families. Rutilus rutilus (Linnaeus, 1758), Scardinius erythrophthalmus (Lin- naeus, 1758), Esox lucius Linnaeus, 1758 and Perccottus glenii Dybowski, 1877 obtained the highest level of frequency. These species and Misgurnus fossilis (Linnaeus, 1758), Aspius aspius (Linnaeus, 1758), and Perca fluviatilis Linnaeus, 1758 were evaluated as the characteristic component of fish com- munities inhabiting aquatic habitats in the floodplain along the lower reaches of the River Latorica. The previous keystone species Ameiurus nebulosus (Lesueur, 1819) h...
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Freshwater fishes recorded in the territory of Slovakia include 95 fish species. As many as one third of these are allochthonous fish species belonging to 14 families, among which several have not occurred in Slovakia recently.... more
Freshwater fishes recorded in the territory of Slovakia include 95 fish species. As many as one third of these are allochthonous fish species belonging to 14 families, among which several have not occurred in Slovakia recently. Historically, there were three main periods of introduction: the first is the beginning of the 20th century, the second includes two decades between 1955 and 1975 and the third period is from the year 1990 up to the present time. The origins of the exotic species seen in Slovakia are the four continents — Africa (3), North America (7), Central America (3), and Asia (13) and ten of them are from different regions in Europe. The purpose of intentional introductions of non-native species was to occupy vacant ecological niches in the ecosystems reshaped by human activities, fish stocking, angling or fish farming. Some of these species spread from their original ranges or they penetrated spontaneously from the adjacent countries via the river network system. At th...
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Six non-native invasive fish species from the Slovak part of the Tisa River basin, namely Carassius gibelio, Pseudorasbora parva, Ameiurus melas, A. nebulosus, Lepomis gibbosus, Perccottus glenii, and three gobiid species from the Danube... more
Six non-native invasive fish species from the Slovak part of the Tisa River basin, namely Carassius gibelio, Pseudorasbora parva, Ameiurus melas, A. nebulosus, Lepomis gibbosus, Perccottus glenii, and three gobiid species from the Danube River, namely Neogobius melanostomus, N. fluviatilis and N. kessleri, were investigated for endohelminth parasites. The expanding Asian cestode Nippotaenia mogurndae (syn. Amurotaenia perccotti) (Nippotaeniidea) has been introduced to Europe with its invasive host P. glenii. Pumpkinseed, Lepomis gibbosus, is a new definitive host of Proteocephalus percae and it is reported as the second intermediate host of the bothriocephalidean cestode Triaenophorus nodulosus in Slovakia.
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three species of the eurasian family Cobitidae are distributed in Slovakia. in the present paper, we describe the coenological affinity of Cobitis elongatoides, Sabanejewia balcanica and Misgurnus fossilis in two distinct zoogeographical... more
three species of the eurasian family Cobitidae are distributed in Slovakia. in the present paper, we describe the coenological affinity of Cobitis elongatoides, Sabanejewia balcanica and Misgurnus fossilis in two distinct zoogeographical regions, Slovak tisza and Danube basins and discuss possible differences of their biotop affinity and habitat preferences. the occurrence of S. balcanica is restricted to primary biotopes with harder substratum particles. typical species assemblages for the rheophilic C. elongatoides are eurytopic and limnophilous species. C. elongatoides is mostly distributed in primary biotopes, such as rivers and channels. it also occurs in secondary biotopes (drainage canal or pit). is distributed mostly in the secondary biotopes, but it is also found in the primary biotopes. Both species prefer fine substratum, but spatial distribution of the two species is different. C. elongatoides prefers harder substratum of sandy particles mixed with mud or detritus and living vegetation, whereas M. fossilis prefers muddy substratum mixed with detritus and dead vegetation.
three species of the eurasian family Cobitidae are distributed in Slovakia. in the present paper, we describe the coenological affinity of Cobitis elongatoides, Sabanejewia balcanica and Misgurnus fossilis in two distinct zoogeographical... more
three species of the eurasian family Cobitidae are distributed in Slovakia. in the present paper, we describe the coenological affinity of Cobitis elongatoides, Sabanejewia balcanica and Misgurnus fossilis in two distinct zoogeographical regions, Slovak tisza and Danube basins and discuss possible differences of their biotop affinity and habitat preferences. the occurrence of S. balcanica is restricted to primary biotopes with harder substratum particles. typical species assemblages for the rheophilic C. elongatoides are eurytopic and limnophilous species. C. elongatoides is mostly distributed in primary biotopes, such as rivers and channels. it also occurs in secondary biotopes (drainage canal or pit). is distributed mostly in the secondary biotopes, but it is also found in the primary biotopes. Both species prefer fine substratum, but spatial distribution of the two species is different. C. elongatoides prefers harder substratum of sandy particles mixed with mud or detritus and living vegetation, whereas M. fossilis prefers muddy substratum mixed with detritus and dead vegetation.