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Fishfauna from the lowland Mures River (Romania) and the floodplain natural park area (Western Romania)

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Author(s): Ilie Catalin TELCEAN | Diana CUPSA

Journal: Analele Universitatii din Oradea, Fascicula Biologie
ISSN 1224-5119

Volume: TOM XVI;
Issue: 1;
Start page: 132;
Date: 2009;
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Keywords: Fishfauna | Mures Floodplain Natural Park | changes in species range | Romania

ABSTRACT
The lowland Mures river has approximately 120 km in length, thereof more than 80 kilometers are comprised on the Mures Floodplain Natural Park that was established since the year 2007. This river stretch has different biotopes with lotic or lentic semblances with very characteristic and diverse fish fauna. Along the lowland main stream a system of canals, marshes and pools are connected. The results of repeated ichtiological surveys carried out during the years 1998 – 2001 and 2004 reveals that 48 fish species live in this river sector and other 2 species has uncertain presence. Most of the species from the river mainstream has maintain their former abundance (24 species) while other 16 fish species has increased their abundance. The burbot Lota lota and Zingel zingel becomes frequent in the lowland Mures, probably as consequence of their population renewal. The number of fish species that having undergone regression is less (4 species) and the exotic species present here are limited to 8 species. The major threatening factors in the lowland Mures represents the mineral aggregate extractions directly from the riverbed and the waste waters spill. Subsequent, the meanders and backwaters shortening or cutting down has a negative impact on the fish populations.
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