Recent studies have shown that archaea which were always thought to live under strict anoxic or extreme environmental conditions are also present in cold, oxygenated seawater, soils, the digestive tract of a holothurian deep-sea-deposit feeder, and a marine sponge. In this study, we show, by using PCR-mediated screening in other marine eukaryotes, that marine archaea are also present in the dig...

in this study, heavy metals such as al, cr, cu, zn, cd, hg, pb etc. content in liver, muscle and gill of three economical marine species [striped seabream (lithognathus mormyrus linneaus, 1758), two-band bream (diplodus vulgaris geoffroy saint-hilaire, 1817) and common pandora (pagellus erythrinus linneaus, 1758)] obtained from 4 stations (fethiye, bodrum, datça, marmaris) in south aegean coast...

Oil spills are the significant sources of hydrocarbons entering in the receiving aquatic environment. An efficient method to remove hydrocarbons from water resources is adsorption. In this study, water soluble N,O-carboxymethyl chitosan (NO-CS) was synthesized by carboxymethylation of chitosan in a hydro-alcoholic medium at 50°C by chloroacetic acid. The polymer was characterized through degree...

Geologic and allozyme evidence suggests that threespine sticklebacks (Gasterosteus aculeatus complex) in low-lying southwestern British Columbia lakes were founded during two incursions of marine sticklebacks after the retreat of the Pleistocene glaciers (the double-invasion hypothesis). We used the salinity tolerance of embryos, measured as hatchability in salt water, to establish the relative...

A global crisis in marine fisheries was regarded with scepticism by many fisheries scientists as recently as 10 years ago. Today, however, few dispute worrying trends [Pitcher and Pauly 1998; Pitcher 2001; Pauly et al. 2002; Christensen et al. 2003; Hilborn et al. 2003; Pauly and Maclean 2003; Food and Agriculture Organization (FAO) 2004]. Historical data from marine ecosystems clearly suggest ...

the asmari formation at nil anticline area has been studied in order to determine faunal assemblages, the age and the paleoecology. paleontological and biostratigraphical studies led to the identification of 5 faunal assemblages. as a result, the age of the asmari formation in this section, with 291m thickness, is rupelian/chattian-burdigalian. extension of the large benthic foraminifera sugges...

To explore the variability of bacterial biomass conversion factors in aquatic environments, 5 manne and 5 non-marine bacterial strains were exposed to nutrient deprivation in artificial seawater and physiological (NaC1, 9 g I-') water, respectively. Carbon content per cell (C,) and per volume (C,) were estimated from total cell number, particulate organic carbon and cell volume (V) measurements...

Ships transport about 80 percent of world trade and transfer approximately three to five billion tons of ballast water internationally every year. Due to the likely presence of pollutants, the ballast water discharged by ships can have negative effects on aquatic ecosystems. This study was conducted on 10 ships that entered the Bushehr port to determine the effectiveness of the ballast water ex...

The presence of toxic marine cyanobacteria and secondary metabolites, microcystins, were studied in Thermaikos Gulf in Central Macedonia in Greece, during the period from March 2013 to March 2014. Toxic marine cyanobacteria were isolated in marine agar and identified with PCR using primers based on 16S rDNA. The presence of microcystins in water extraction was detected by immunoassay (competiti...

AIMS Developing a rapid method for detection of faecal pollution is among the critical goals set forth by the Environmental Protection Agency in its revision of water quality criteria. The purpose of this study is to devise and test covalently linked antibody-bead complexes for faecal indicator bacteria (FIB), specifically Escherichia coli or Enterococcus spp., in measuring water quality in fre...