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Assessment on the Ephemeroptera distribution (Insecta) in relation with aquatic parameters in different rivers from Aninei Mountains (SW Romania)

Author(s): Cristina-Constantina Eftenoiu | Milca Petrovici | Lucian Pârvulescu

Journal: Aquaculture, Aquarium, Conservation & Legislation
ISSN 1844-8143

Volume: 4;
Issue: 1;
Start page: 27;
Date: 2011;
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Keywords: Ephemeroptera | diversity | Aninei Mountains | Bârzava | Nera | Caraș

The wide distribution and high tolerance to physical and chemical factors makes it possible forEphemeroptera to be used as a bioindicators. The objective of this paper was to bring some new informationregarding the distribution of the ephemera species in western Romania, together with the analysis of speciesdistribution in relation to certain physical-chemical parameters. The samples were taken from the three riverbasins of the Aninei Mountains (Bârzava, Caraș and Nera), totalizing a number of 27 sites located on thetributary and on the main course of the rivers. We identified a number of 14 species, the most commonbeing Ecdyonurus venosus, Ecdyonurus torrentis, Bäetis rhodani and Serratella ignita. The statisticalinterpretation, related to physicochemical factors showed a decisive effect of the water temperature, ofdissolved oxygen, magnesium, nitrate and cyanide, concerning the distribution of some common species ofmayflies.
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