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Turkish Journal of Fisheries and Aquatic Sciences 2012, Vol 12, Num, 3     (Pages: 719-727)

Species Composition and Distribution of Mollusca in Relation to Water Quality

Melek Zeybek 1 ,Hasan Kalyoncu 1 ,Ömer Osman Ertan 2

1 Süleyman Demirel University, Faculty of Science and Art, Department of Biology, 32260 Isparta, Turkey
2 Süleyman Demirel University, Faculty of Aquatic Products Department of Fundamental Sciences, 32500 Eğirdir, Isparta, Turkey
DOI : 10.4194/1303-2712-v12_3_21 Viewed : 2044 - Downloaded : 2447 Lake Eğirdir is an “A class wetland” according to international criteria and in terms of the protection of biological diversity. The lake connects to Lake Kovada via a regulator and channel system. Lake Kovada is one of the important Nature Conservation Areas in Turkey. In this study, the possibility of using Mollusca for assessment of water quality in lakes Eğirdir and Kovada, study-area water quality according to physico-chemical parameters, variety and distribution of Mollusca, and ecological aspects were investigated from July 2010 to June 2011. Mollusk fauna in the working field was represented by 11 taxa of Gastropoda and 2 taxa of Bivalvia. Radix auricularia at E1 station; Theodoxus heldreichi heldreichi, Falsipyrgula pfeiferi, Radix labiata, Planorbis planorbis and Hippeutis complanatus at E2 station; Gyraulus albus at K1 station; Physella acuta at K2 station; Bithynia pseudemmericia and Graecoanatolica lacustristurca at E3 station; Borysthenia naticina at C3 station and Pisidium casertanum at C2 station reached to the highest dominance. Water quality was determined using by physicochemical parameters. Three different classes of water quality were determined. Based on the assessments, the stations on Lake Eğirdir (E1, E2, E3) were unpolluted, those on Kovada channel (C1, C2, C3) moderately polluted, while those on Lake Kovada (K1, K2, K3) slightly polluted. The relationships between the total number of individuals and environmental measurements were determined by Pearson correlation index. The results of analysis suggest a significant correlation between the total number of individuals and some environmental measurements such as dissolved oxygen, pH, total hardness, anions and cations. Additionally, Hippeutis complanatus was firstly recorded from the Lake Eğirdir. Keywords : Environmental parameters, Lake Eğirdir, Lake Kovada