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Changes in marsh nekton communities along the salinity gradient of the Schelde river, Belgium and The Netherlands
Hampel, H.; Cattrijsse, A.; Mees, J. (2004). Changes in marsh nekton communities along the salinity gradient of the Schelde river, Belgium and The Netherlands. Hydrobiologia 515(1-3): 137-146. https://dx.doi.org/10.1023/b:hydr.0000027325.16156.6c
In: Hydrobiologia. Springer: The Hague. ISSN 0018-8158; e-ISSN 1573-5117, meer
Peer reviewed article  
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Trefwoorden
    ANE, Netherlands, Westerschelde
    Aquatic communities > Nekton
    Belgium, Het Zwin natuurreservaat
    Belgium, Schelde R.
    Gradients > Salinity gradients
    Nets
    Water bodies > Inland waters > Wetlands > Marshes
    Schelde R. [Marine Regions]; Westerschelde [Marine Regions]; Zwin [Marine Regions]
    Marien/Kust; Brak water
Author keywords
    marsh habitat types; salinity gradient; nekton; Schelde
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Abstract
    Nekton was sampled in five marshes along the salinity gradient of the Schelde River. The utilisation of three different habitats (large and small creek, marsh pond) by fish and macrocrustacean species was compared among the five sampling sites. In the larger channels fyke nets were deployed to capture fish and macrocrustaceans leaving the marsh at ebb while block nets were set in smaller intertidal creeks. Fish traps passively sampled fish and shrimp in the marsh ponds. The tidal freshwater marsh had a species poor fauna and only a low number of fish was caught. Besides some freshwater species (Alburnoides bipunctatus, Carassius carassius) the European eel, Anguilla anguilla was still present. The four other marshes had a similar community structure although Platichthys flesus was absent from the euhaline area. Among fish species, dominance of Dicentrarchus labrax, Platichthys flesus and Pomatoschistus microps was observed. Carcinus maenas and Palaemonetes varians were the most abundant macrocrustacean species in every marsh. Between the large and small intertidal creeks there was no difference in nekton species composition. The main species used both habitats. Marsh ponds were utilized intensively only by two species, Pomatoschistus microps and Palaemonetes varians in every marsh.
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