The authors present shortly some data regarding the origin and occurrence of species Pseudorasbora parva, then they realise an analysis of the most important papers written by Romanian authors, both in our country and abroad, concerning this species.

Pseudorasbora parva --- Topmouth gudgeon --- Bibliography

The article presents some general facts about omega-3 fatty acids and their role in the treatment and prevention of cardiovascular diseases. Omega-3 fatty acids are essential for the human body. Their beneficial effects in the prevention of cardiovascular disease have been known for decades. Since then, several epidemiological and interventional trials showed the value of omega-3 acids in the treatment of certain diseases. Most of them revealed the protective role of omega-3 fatty acids on heart and cardiac functions. However, some of these studies couldn?t demonstrate a positive association between fish oils and preventing cardiac events. The major cardiologic societies from European Union and United States of America recommend omega-3 fatty acids as supplements for primary and secondary prophylaxis of cardiovascular diseases.

Omega-3 fatty acids --- Cardiovascular diseases --- Protective factor --- Diet recommendations

Chromium may occur in nine different forms of oxidation ranging from ?II to +VI, with forms II, III and VI as the most commonly encountered. In Cluj county, chromium pollution dates well back in time and has caused important dysfunction to the mechanical-biological wastewater purification station of the city of Cluj (Coşier & Diţă 1996). The purpose of this study was to develop one microbial method able to reduce hexavalent chromium (mobile, permeable to cell membrane, carcinogenic and mutagenic) (Ishikawa et al 1994) to the trivalent form (insoluble and an essential element for humans) (Song et al 2006). Different sources of chromium-reducing bacteria and many sources of carbon and energy added to the Kvasnikov mineral basal medium (Komori et al 1990) with increasing amount of chromate (200- 1000 mg/l) were tested. Two bacterial strains, able to reduce even 1000 mg chromate/l, were isolated in pure culture. For one of these bacterial strains, we determined the optimum conditions for the reduction of Cr (VI).

Chromium-reducing bacteria --- Inocula --- Chromate --- Bacterial strain --- Molasses --- Sludge --- Mud --- Wastewater

Concentration of the four heavy metals (Cu, Zn, Pb, Cd) in tissues of the Eurasian minnow Phoxinus phoxinus from Polish part of the Czarna Orawa River system was investigated using the AAS method. Significant differences among sampling sites were recorded, and visible trend was observed, i.e. concentrations of these metals arose from the upper most to the lower most site. Anthropogenic pollution of the river is inferred from these data. Urgent water treatment and prevention are needed to protect environment of this submontane river.

Cadmium --- Copper --- Czarna Orawa --- Lead --- Zinc

The present paper summarizes a large part of the endangered and critically endangered fish species of the world. The list was constructed using the comprehensive IUCN Red List of Threatened Species (available in December 2008) and the well elaborated FISHBASE (available on the official website, in 2008) for taxonomy and accepted scientific names of the species. To these two important sources, many scientific papers and communications were added when recent and useful reports were found. However, there is a long way from the fish species list of this review to the world?s complete list of endangered and critically endangered fish species. In our list were not included subspecies, populations, varieties, or species having a debatable taxonomic status. The scope of this review was not to inventorize all the fishes included in these two categories, but to make possible drawing some general conclusions regarding most important possible causes of fish species extinction and to make suggestions concerning fish species conservation possibilities through aquaculture.

Endangered fish species --- Critically endangered --- Causes --- Population trend