Morphometric and genetic evidence for cryptic diversity in Gyrodactylus (Monogenea) infecting non-native European populations of Ameiurus nebulosus and A. melas

Parasitology ◽  
2020 ◽  
Vol 147 (14) ◽  
pp. 1700-1711
Author(s):  
Markéta Ondračková ◽  
Mária Seifertová ◽  
Anna Bryjová ◽  
Eric Leis ◽  
Pavel Jurajda
Keyword(s):  
North American ◽  
Elbe River ◽  
Ameiurus Nebulosus ◽  
Native Populations ◽  
Elbe River Basin ◽  
Morphological Differences ◽  
The Elbe River ◽  
Hard Structures ◽  
Fish Hosts ◽  
Ameiurus Melas

AbstractGyrodactylid parasites were observed on non-native populations of North-American freshwater catfishes, Ameiurus nebulosus and Ameiurus melas (Siluriformes: Ictaluridae), at several sites in the Elbe River basin, Czech Republic, Europe. Using a combination of morphological and genetic analyses, the parasites infecting A. nebulosus were determined to be Gyrodactylus nebulosus, a North American parasite co-introduced to Europe along with its Ameiurus fish hosts. Subtle morphometrical differences, as well as seasonal variations, were observed among parasites collected from A. nebulosus and A. melas. The host-related variation was further supported through genetic analysis of the partial 18S rDNA, ITS1-5.8S-ITS2 and COI, showing 0.2, 3.0 and 4.8% divergence, respectively. Consistent genetic differences indicated there were two distinct genotypes. Subtle morphological differences associated with the shape of sickle toe, anchor root and ventral bar membrane, according to host species, also supported the description of a new cryptic species, Gyrodactylus melas n. sp., infecting A. melas. Multivariate morphometrical analysis of haptoral hard parts showed significant differences between the anchor lengths of G. nebulosus and G. melas n. sp. However, the measurements of the haptoral hard structures partially overlapped between species, limiting the usage of these parameters for species delineation.

scholarly journals Expected changes in water resources availability and water quality with respect to climate change in the Elbe River basin (Germany)

2005 ◽  
Vol 36 (4-5) ◽  
pp. 321-333 ◽  
Author(s):  
Valentina Krysanova ◽  
Fred Hattermann ◽  
Anja Habeck
Keyword(s):  
Climate Change ◽  
Water Quality ◽  
River Basin ◽  
Hydrological Cycle ◽  
Water Discharge ◽  
Regional Scale ◽  
Elbe River ◽  
Elbe River Basin ◽  
The Mean ◽  
The Elbe River

Reliable modelling of climate–water interactions at the river basin and regional scale requires development of advanced modelling approaches at scales relevant for assessing the potential effects of climate change on the hydrological cycle. These approaches should represent the atmospheric, surface and subsurface hydrological processes and take into account their characteristic temporal and spatial scales of occurrence. The paper presents a climate change impact assessment performed for the Elbe River basin in Germany (about 100 000 km2). The method used for the study combines: (a) a statistical downscaling method driven by GCM-predicted temperature trend for producing climate scenarios, and (b) a simulation technique based on an ecohydrological semi-distributed river basin model, which was thoroughly validated in advance. The overall result of the climate impact study for the basin is that the mean water discharge and the mean groundwater recharge in the Elbe basin will be most likely decreased under the expected climate change and diffuse source pollution will be diminished. Our study confirms that the uncertainty in hydrological and water quality responses to changing climate is generally higher than the uncertainty in climate input. The method is transferable to other basins in the temperate zone.

scholarly journals Dioxin in the Elbe river basin: policy and science under the water framework directive 2000–2015 and toward 2021

2016 ◽  
Vol 28 (1) ◽  
Author(s):  
Ulrich Förstner ◽  
Henner Hollert ◽  
Markus Brinkmann ◽  
Kathrin Eichbaum ◽  
Roland Weber ◽  
...  
Keyword(s):  
Water Framework Directive ◽  
River Basin ◽  
Elbe River ◽  
Elbe River Basin ◽  
The Elbe River ◽  
Policy And Science

scholarly journals Nález severoamerického druhu Menetus dilatatus (Mollusca: Gastropoda) v jižních Čechách (Česká republika) [Record of Menetus dilatatus (Mollusca: Gastropoda) in the Southern Bohemia (Czech Republic)]

2003 ◽  
Vol 2 ◽  
pp. 1-2 ◽  
Author(s):  
Luboš Beran
Keyword(s):  
Czech Republic ◽  
Water Depth ◽  
North American ◽  
Elbe River ◽  
The North ◽  
Grid Mapping ◽  
The Elbe River

The record of the North-American gastropod Menetus dilatatus in the Southern Bohemia is mentioned in this paper. This finding is more than 80 km distant from known localities in the Elbe River Lowland and is the first one in the Southern Bohemia. This species was found in the mapping field for faunistic grid mapping No. 6551 (see Fig. 1) in the Otava River in the Orlík Dam Lake by diving in the water depth of ca. 2 m.

scholarly journals Nález severoamerického druhu Menetus dilatatus (Mollusca: Gastropoda) v jižních Čechách (Česká republika) [Record of Menetus dilatatus (Mollusca: Gastropoda) in the Southern Bohemia (Czech Republic)]

2003 ◽  
Vol 2 ◽  
pp. 1-2
Author(s):  
Luboš Beran
Keyword(s):  
Czech Republic ◽  
Water Depth ◽  
North American ◽  
Elbe River ◽  
The North ◽  
Grid Mapping ◽  
The Elbe River

The record of the North-American gastropod Menetus dilatatus in the Southern Bohemia is mentioned in this paper. This finding is more than 80 km distant from known localities in the Elbe River Lowland and is the first one in the Southern Bohemia. This species was found in the mapping field for faunistic grid mapping No. 6551 (see Fig. 1) in the Otava River in the Orlík Dam Lake by diving in the water depth of ca. 2 m.

scholarly journals Historical occurrence and extinction of Atlantic salmon in the River Elbe from the fourteenth to the twentieth centuries

2015 ◽  
Vol 23 (1) ◽  
pp. 3-16
Author(s):  
Jan Andreska ◽  
Lubomír Hanel
Keyword(s):  
Atlantic Salmon ◽  
River Basin ◽  
Central Europe ◽  
Legal Protection ◽  
Historical Background ◽  
Elbe River ◽  
River Elbe ◽  
Elbe River Basin ◽  
The Elbe River ◽  
Historical Methods

Abstract Data on the occurrence, biology, and historical background of the Atlantic salmon, Salmo salar L., (Pisces, Salmoniformes) in the Elbe river basin (Europe, North Sea drainage area) with a focus on Bohemian territory (Central Europe) from the fourteenth to twentieth centuries are summarized in this paper. Historical methods of salmon fishing in Central Europe and historical legal protection of salmon in Bohemia are presented. The salmon is a model example of species which was extirpated as a result of anthropogenic changes in the landscape and rivers in some water systems. The human activities, such as stream bed regulation, dam system construction, other migration barriers, water pollution, fisheries exploitation, that led to the extirpation of Atlantic salmon in the Elbe river basin (are discussed. The last sporadic migrating native salmon were registered in the Bohemian section of the Elbe river basin in the mid twentieth century.

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