Researches of fish communities from Rosu-Puiu and Matita-Merhei lake-complexes in 2008

• Main Authors: NĂSTASE Aurel, NĂVODARU Ion
• Format: Article
• Language: English
• Published: CITDD Publishing House 2010-09-01
• Series: Scientific Annals of the Danube Delta Institute
• Subjects: ichthyodiversity; fish ecology; lakes; Danube Delta
• Online Access: http://www.ddni.ro/manager/editor/UserFiles/File/Scientific%20annals/volume/16/3.pdf
• ISSN: 1842-614X; 2247-9902

Ichthyofauna from Matita-Merhei and Rosu-Puiu lake-complexes was studied in 2008, using two complementary methods of sampling: electric fishing for shallow border zone and gillnet fishing for deep open water. The paper presents the actual status of the fish communities for two lake-complex from Danube Delta (Romania). InMatita-Merhei lake-complex were captured 31 fish species (3 exotic species and 28 native species). For this complex the most abundant fish species are: Alburnus alburnus, Rhodeus amarus, Rutilus rutilus, Scardinius erythrophthalmus, Perca fluviatilis and Carassius gibelio with differences depending on the sampling methods. In Rosu-Puiu lake-complex were caught 31 fish species, with 4 exotic and 27 native. In this complex the most abundant fish species are Alburnus alburnus, Rutilus rutilus, Rhodeus amarus, Perca fluviatilis, Scardinius erythrophthalmus, Blicca bjoerkna and Gymnocephalus cernuus, with differences depending on the sampling methods. The largest biomass percentage had Carassius gibelio and Blicca bjoerkna for both complexes, but with differences depending on the sampling methods. The biodiversity indices show stable ecosystems and stable ichthyocoenosis, little a more bit stable nerby the shoreline than open water.