Tracking and determining the amount and types of urban sewage that is being releasing to the environment is important in planning for wastewater treatment systems and water quality control. In this research, in four stations of Anzali Lagoon, (by means of a gas chromatograph device with mass detector spectrometer) wastewater pollution has been measured and evaluated with molecular indicator Lin...

Though Ukraine is one of the countries with insufficient water supply, northern region central Polissia has a dense river network. The region’s major rivers – Teteriv, Sluch, Ubort, and Uzh have undergone significant anthropogenic change. Water pollution adversely affected their fauna, including Unionidae (Mollusca: Bivalvia). This study monitored these changes, was conducted in two stages. A t...

1. The rate of heart beat increased with temperature and was three times as high in the active as in the inactive animal. 2. The rate of shell valve movement rose and the rate of heart beat fell when the foot was extended. 3. The rates of heart beat and shell valve movement decreased when the water was saturated with carbon dioxide. This heart response remained when the visceral ganglion was de...

During 2009–2011, 50 points of the Daube River Basin were surveyed. In 23 them, seven species Unionidae recorded: U. pictorum, tumidus, crassus sensu lato, A. anatina, cygnea, P. ?omplanat? and S. woodiana, which is an invasive species. Th e index occurrence freshwater mussels in general was 100 % Lower Danube (5 study areas), 42 Tisa (31 33.3 Seret (3 36 Prut (11 areas). rather low: 24 22 cras...