Arsenic is a toxic metalloid existing widely in the environment, and its removal from contaminated water has become a global challenge. The use of bacteria in this regard finds a promising solution. In the present study, Exiguobacterium sp. As-9, which is an arsenic resistant bacterium, was selected with respect to its arsenic removal efficiency. Quantification of arsenic in the water treated w...

We studied the ecological effects of mining-derived metals on riffle-dwelling benthic fishes at 16 sites in the Viburnum Trend lead-zinc mining district of southeast Missouri. Fish community attributes were compared to watershed features and to physical and chemical variables including metal concentrations in sediment pore water and fish. Ozark sculpin (Cottus hypselurus), rainbow darter (Etheo...

b a ckground: west nile virus (wnv) and rift valley fever virus (rvfv) are mosquito-borne viral diseases. the objective of this study was to investigate the rvfv and wnv infections as serologically in different mammalian species (cattle, horse, goat, sheep and water buffalo) in the northern turkey. m e t hods: blood samples randomly collected from 70 each cattle, horse, sheep, goat and water bu...

[1] Surface temperatures were extracted from nighttime thermal infrared imagery of 167 large inland water bodies distributed worldwide beginning in 1985 for the months July through September and January through March. Results indicate that the mean nighttime surface water temperature has been rapidly warming for the period 1985–2009 with an average rate of 0.045 ± 0.011°C yr and rates as high a...

the native fishes of springs, ghanats and caves of iran are uniquely significant, since they are rear and, because of pollution, dryness, . purposeful or accidental introduction of exotic species and over all, because of industrialization are in danger. the stock of valuable fishes of iran are declining while they have not been completely identified. the stock of these fishes, particularly thos...

The ability of some fishes to live in both sea water and fresh water has attracted a great deal of interest. Many euryhaline fishes are difficult to rear in laboratory conditions ; some do not survive in completely fresh water, and migratory fishes are often euryhaline for only limited periods during their life-history. Species of the genus Tilapia have none of these disadvantages; they are eas...

primary objectives of this research included 1) develop models relating occurrence of two threatened inland salmonid fishes to stream temperature regimes; 2) develop a comprehensive protocol for sampling stream temperatures using digital data loggers. The two species of interest were bull trout (Salvelinus confluentus) and Lahontan cutthroat trout (Oncorhynchus clarki henshawi). The distributio...

this study evaluates the influence of yanã½klar creek on the water quality of fethiye gulf. accordingly, this study demonstrates (i) change in the water quality of fethiye gulf from 2006 to 2007; (ii) the water quality classification of the yanã½klar creek feeding fethiye gulf; and (iii) how land-based fish farm influences yanã½klar creek water quality in a fethiye-gã¶cek specially protected ar...