The influence of structural changes and ichtyofauna abundance on the ecological state of the Crisuri Hydrographic Are
Journal Title: Aquaculture, Aquarium, Conservation & Legislation - International Journal of the Bioflux Society - Year 2011, Vol 4, Issue 2
Abstract
The paper presents the research regarding the structure of fish communities with a view to assess the quality of water in the Crişuri Hydrographic Area. It is also a comparative study of the ichtyofauna composition in the ’60s and the 2004-2009 period. In order to inventorize and describe the ichtyofauna of the Crişuri Hydrographic Area, periodical campaigns for fish sample prelevation by means of electric fishing were conducted over a period of six years. This inventory comprises the main Crişuri watercourses and their streams, totalizing a number of 98 prelevation sections. Consequently, 33 fish species were identified, some of which (Thymallus thymallus, Eudontomyzon danfordi) of very low density, some others (Chondrostoma nasus, Squalius cephalus, Barbus barbus, Barbus petenyi) in expansion for mountaineous regions. This upstream re-location of some species was noticed in each hydrographic basin.
Authors and Affiliations
Istvan Gergely, Julieta-Emilia Romocea, Corina Sion (Badalan)
Keywords
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