Ichthyofauna diversity of the Prut River and the major threats

• Main Authors: Bulat, D.E., Булат, Д., Toderaş, I.C., Toderash, I.K., Тодераш, И., Usatîi, M.A., Усатый, М.А., Bileţchi, L.I., Ene, A., Bogdevici, O.P., Bogdevich, O., Богдевич, О., Denga, Y., Деньга, Ю.М.
• Format: Article in Journal/Newspaper
• Language: English
• Published: 2015
• Subjects: Popa; Lota lota; lota
• Online Access: https://ibn.idsi.md/vizualizare_articol/107449

Ichthyological investigations, which have been conducted in the Prut River basin during 2010-2015, established an ichthyofauna composed of 55 fish species, assigned to 11 families and 8 orders: ord. Acipenseriformes, fam. Acipenseridae 1 species; ord. Clupeiformes, fam. Clupeidae 1 species; ord. Esociformes, fam. Esocidae 1 species; ord. Cypriniformes, fam. Cyprinidae 27 species, fam. Balitoridae 1 species, fam. Cobitidae 5 species; ord. Siluriformes, fam. Siluridae 1 species; ord. Gadiformes, fam. Lotidae 1 species; ord. Gasterosteiformes, fam. Gasterosteidae 2 species; ord. Sygnathiformes, fam Sygnathidae 1 species; ord. Perciformes, fam. Percidae 6 species, fam. Gobiidae 5 species, fam. Centrarchidae 1 species, fam. Odontobutidae 1 species. The number of identified species has undergone insignificant changes Popa, 1977-56 species; Bulat et al., 2015-55 species, but the qualitative components of ichthyocenosis and taxon share in captures have changed essentially. A continuous substitution of large size native species with small or medium size allogenic species or opportunist intervenients is observed, which recently demonstrated a significant expansion rate. However, some representatives of community importance are still quite common in captures e.g. Alosa tanaica Beleu lake in the spring, Barbus barbus riverbed, Chondrostoma nasus riverbed, Vimba vimba riverbed and the Costestindash;Stanca lake, Ballerus sapa riverbed and Costestindash;Stanca lake, Pelecus cultratus lower sector, Leuciscus idus lower sector, Alburnoides bipunctatus medial sector of riverbed, Sabanejewia balcanica riverbed, Lota lota medial sector of riverbed, Gymnocephalus baloni lower sector, Zingel zingel some habitats in the lower river sector, etc. Among the fish species that currently show an obvious biological progression and hold the largest share in the captures of the Prut River basin within the borders of the Republic of Moldova there are: Carassius auratus s. lato in all biotopes, Blicca bjoerkna lower sector, Rutilus rutilus in ...