Study of ichthyofauna from Roşu-Puiu lake-complex

• Main Authors: NĂVODARU Ion, NĂSTASE Aurel, CERNISENCU Irina
• Format: Article
• Language: English
• Published: CITDD Publishing House 2007-10-01
• Series: Scientific Annals of the Danube Delta Institute
• Subjects: species richness; fish communities; ecologic indices; biodiversity; equitability index
• Online Access: http://www.ddni.ro/manager/editor/UserFiles/File/Scientific%20annals/volume/13/12.pdf

The study of ichthyofauna from Rosu-Puiu lake-complex was undertaken in May 2005, using two complementary methods of sampling: electric fishing for shoreline and gillnet fishing for deep water zone. Thepaper presents the actual situation of the fish communities from the Rosu-Puiu lake-complex, part of “marine delta” from Danube delta. In this lake-complex there were catched 29 species of fish (5 exotic species and 24 native species. The most abundant fish species are Alburnus alburnus (bleak), Abramis bjoerkna (silver bream),Clupeonella cultriventris (Black Sea sprat), Carassius gibelio (Prussian carp) and Rutilus rutilus (roach) with slight differences for those two complementary methods of sampling. The biodiversity index and equitability indices were calculated per lake and methods.The lake-complex has a stable ecosystem, with shoreline (1.155 Shanon-Wiener index and 0.437 equitability indices) less stables than open water (1.878 Shanon-Wiener index and 0.576 equitability indices).