Gastropod Species Distribution and its Relation with some Physico-chemical Parameters of the Malatya's Streams (East Anatolia, Turkey)

Abstract

In order to determine the gastropod fauna of Malatya's streams, samplings were made from 15 stations between August 2005 and September 2006. According to our results, gastropod fauna in Malatya's streams samplings involved 5 taxa of Prosobranchia (Theodoxus almond's (Recluz, 1841), Bithynia pseademmerica Leach 1818, Bithynia tentaculata (Linnaeus, 1758), Hydrobiidae Simpson 1865, Viviparus viviparus Cobb, 1920) and species of Pulmonata (Galba truncatula (Linnaeus, 1767), Radix ovata (Draparnaud 1801), Phvsella acuta (Draparnaud 1805), Planorbis planorbis Hoglund, 1947, Planorbis carinatus O.F. Muller, 1774, Planorbarius corneas (Linnaeus 1758), Acroloxus lacustris (Linnaeus 1758)). According to the Shannon-Wiener index, the species diversity in Malatya's streams samplings region had a diversity of 0.774; station O-2 were found to have highest diversity while station Su to have the poorest. According to the Bray-Curtis similarity index station 1 and 8 were found to be most similar to each other for the gastropod species. Also, some physico-chemical parameters of the water (dissolved oxygen, water temperature, NO2--N and NO3--N) were analysed. The abundance of some of the 12 species was correlated positively with temperature (p<0.01).