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Nicolae Bălcescu, Romania

Nistor C.,Dunarea Of Josuniversity | Muntean M.-C.,Dunarea Of Josuniversity | Nistor R.,Dunarea Of Josuniversity
Proceedings of the International Conference on Risk Management, Assessment and Mitigation, RIMA '10 | Year: 2010

Any activity or economic effort is based on a number of unknown and uncertain factors or opportunities simply because its subject is located in the future. All decisions or actions that will lead to a production process or act of foreign trade is inevitably initiated or taken in circumstances of uncertainty and risk. There are sometimes situations where the uncertainty is too high, making it virtually impossible because a decision or goal in itself or the way that it can achieve are not sufficiently defined, or that risks could be totally destructive. In normal economic life, we don't have to choose between risky situations and certain situations, but between different degrees of risk and different outcomes.

Mihalache A.,Dunarea Of Josuniversity | Oprea L.,Dunarea Of Josuniversity | Dediu L.,Dunarea Of Josuniversity | Cristea V.,Dunarea Of Josuniversity | And 3 more authors.
Journal of Environmental Protection and Ecology | Year: 2011

The aim of the experiment was to determine the growth performance of the Japanese ornamental carp fry. They were reared under controlled conditions in a recirculating aquaculture system (RAS) and fed with pellets. The fish were divided into 2 experimental variants, with repetition, at the following densities: variant V1 (B 1 and B2) -150 fish/unit (0.4 g/fish); variant V2 (B3 and B4) - 300 fish/unit (0.4 g/fish). The rearing period was 30 days. The final mean body weight was 1.06 g/fish in variant A and 0.93 g/fish in variant B, while total losses were 14.16 and 16.33%, respectively. The data were statistically analysed with ANOVA test. The condition state of the ornamental carp fry, as evidenced by the allometric factor analysis, was better in the first variant, where a low stocking density was maintained. Also, feeding efficiency was superior in this variant, as confirmed by lower values of the feed conversion ratio.

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