Changes in the fish fauna and fisheries in the Slovak section of the Danube River: a review

Holčík, Juraj

doi:10.1051/limn/2003015

Cited by 40 publications

(25 citation statements)

References 25 publications

(16 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For example, the migration of particular fish coincide with spring and summer Danube floods. According to Holčík (2003), the optimal situation should be that both floods cover the entire floodplain. The commencement, culmination, and fading away of floods should simulate the situation which existed before the construction of river dikes.…”

Section: Introductionmentioning

confidence: 99%

Identification of long-term high-flow regime changes in selected stations along the Danube River

Pekárová

Pramuk

Halmová

et al. 2016

Journal of Hydrology and Hydromechanics

View full text Add to dashboard Cite

Abstract:The aim of the paper is to study spatial and temporal changes in the magnitude, duration and frequency of high flows in the Danube basin. A hydrological series of the mean daily discharges from 20 gauging stations (operated minimally since 1930) were used for the analysis of changes in the daily discharges. The high flow events were classified into three classes: high flow pulses, small floods, and large floods. For each year and for each class, the means of the peak discharges, the number and duration of events, and the rate of changes of the rising and falling limbs of the waves were determined. The long-term trends of the annual time series obtained were analyzed and statistically evaluated.The long-term high flow changes were found to be different in three individual high flow classes. The duration of the category of high flow pulses is decreasing at 19 stations on the Danube and is statistically significant at the Linz, Vienna, Bratislava and Orsova stations. The frequency of the high flow pulses is increasing in all 20 stations. Also, the rising and falling rates of the high flow pulse category are increasing at the majority of the stations. The long-term trends of the selected characteristics of the small floods are very similar to the trends of the high flow pulses, i.e., the duration of small floods is decreasing, and their mean number per year is increasing. In the category of large floods the changes were not proved.

show abstract

Section: Introductionmentioning

confidence: 99%

Identification of long-term high-flow regime changes in selected stations along the Danube River

Pekárová

Pramuk

Halmová

et al. 2016

Journal of Hydrology and Hydromechanics

View full text Add to dashboard Cite

show abstract

“…Understanding the patterns of geographic variation in the structure of fish assemblages is therefore of crucial importance to develop a comprehensive assessment of stream conditions. The number of fish species occurring in a given area is related to numerous local factors (OBERDORFF et al, 1993;HOLCÍK, 2003;KRUK and PENCZAK, 2003), and species richness patterns are important biodiversity indicators (GASTON, 1996). Specifically, in the River Garonne drainage basin (S. W. France), MASTRORILLO et al (1996) observed that there were natural differences in the spatial distribution of fish species richness, but did not assess the influence of environmental factors on the observed patterns.…”

Section: Introductionmentioning

confidence: 99%

Environmental Factors Influencing Local Fish Species Richness and Differences between Hydroregions in South‐Western France

Santoul¹,

Soulard

Figuerola

et al. 2004

International Review of Hydrobiology

View full text Add to dashboard Cite

The aim of this study was to investigate the influence of 5 typological variables on the spatial distribution patterns of fish species richness in south-western France, and, subsequently, to analyse differences in the number of species occurring in 6 major hydroregions located within the overall study area. The data were collected at 329 sampling sites. General Linear Modelling was used to assess the influence of each typological variable on local fish species richness, and to determine the differences in local fish species richness between the 6 hydroregions. Local species richness was significantly influenced by altitude, slope and catchment area, whereas distance from the source and stream width showed no significant relations with local richness. The Côteaux de Gascogne hydroregion had a significantly lower species richness, whereas no significant differences occurred among other neighbouring hydroregions. These results were congruent with the spatial distribution patterns of freshwater invertebrate species richness in the area, which were analysed in previous studies. At such a regional scale, we suggest that congruent patterns between fish and invertebrate species richness are almost certainly a result of similar responses by different taxa to environmental conditions, rather than to biotic interactions.

show abstract

“…Other species such as, Lepomis gibbosus (L., 1758) (Balon & Mišík 1956), Carassius auratus (L., 1758), Carassius gibelio (Bloch, 1782) (Balon 1962), Gasterosteus aculeatus (L., 1758) (Balon 1967) and Pseudorasbora parva (Temminck & Schlegel, 1846) (Žitňan & Holčík 1975) spread spontaneously from adjacent countries. The occurrence of Micropterus salmoides (Lacepède, 1802) -only one specimen (Mišík 1958) and Coregonus renke (Schrank, 1783) -four specimens was accidental (Holčík 2003), and the distribution area of three ornamental species Poecilia reticulata Peters, 1859, Poecilia sphaenops (Valenciennes, 1846), Xiphophorus helleri Heckel, 1848 was limited to the thermal brook near the spa in Bojnice town (Hensel & Brtek 1971).…”

Section: Resultsmentioning

confidence: 99%

“…The origin of translocated coregonids is Russia (Coregonus albula, Coregonus peled), Poland (Coregonus maraena), Alpine lakes (Coregonus renke) (Holčík 2003) and only once, the fertilized eggs of Coregonus wartmanni from Switzerland were transferred.…”

Section: Origin Of Non-native Speciesmentioning

confidence: 99%

Non-native fish species in Slovak waters: origins and present status

et al. 2010

View full text Add to dashboard Cite

Abstract: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 20 th 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 the present time, 76 fish species in total form populations in Slovakia. There are 54 autochthonous and 22 allochthonous species, 14 of them are exotic fishes. The invasive characters in 13 fish species were considered, the recent native/total fish ratio is 0.71.

show abstract

Changes in the fish fauna and fisheries in the Slovak section of the Danube River: a review

Cited by 40 publications

References 25 publications

Identification of long-term high-flow regime changes in selected stations along the Danube River

Identification of long-term high-flow regime changes in selected stations along the Danube River

Environmental Factors Influencing Local Fish Species Richness and Differences between Hydroregions in South‐Western France

Non-native fish species in Slovak waters: origins and present status

Contact Info

Product

Resources

About