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Natural and synthetic zeolites are widely used in animal nutrition as performance promoters, and their use also exerts a variety of favourable effects on the prevention or treatment of certain animal diseases in the farm. Natural zeolites provide the necessary macro and trace elements for animals, and stimulate their health and production (Quote Garcia-Lopez et al., 1992; Nikkhah et al., 2001; Sadeghia si Shawrangb, 2008; Dschaak et al., 2010; Deniz Alic Ural, 2014; Panagiotis et al., 2016). Thus the present paper has proposed the characterization of tuff in terms of its nutrient content and the study of the effects of its use in cows feeding on milk quality. Tuff has 90.49g% dry matter, 1.63g% calcium, 0.09g% phosphorus, 1793.18ppm iron. The raw ingredients used in the diets of dairy cows were: a mixture of barley and corn with a content of 87.52g% of dry matter, 9.61g% crude protein, 1.39g% ether extractives; corn cob + beans with 39.21% dry matter, 3.68g% crude protein, 1.36g% ether extractives; corn silage with a content of 28.71 g% dry matter, 1.47 g% crude protein, 0.54 g% ether extractives, and alfalfa hay with 88.87 g% dry matter, 17.23 g% crude protein, 0.92 g% ether extractives. Cow's milk had 13.51g% dry matter, 2.62 g% protein, 0.11g% calcium, 0.08g% phosphorus, 1.63 ppm iron. [ABSTRACT FROM AUTHOR]

According to the Regulation (EC) No 178/2002, food business operators are responsible to achieve the relevant requirements for food safety. Aquaculture, fishery, processing and distribution of fish and fishery products should be carried out respecting and ensuring food safety and quality conditions. Implementing a traceability system significantly reduces the exposure to the economic food chain, guarantees food safety, transparency and increase consumer confidence. In this regard, the study was undertaken based on the questionnaires applied to aquaculture operators and future specialists in the field. According to the results, the main benefits that the company may achieve by implementing a system of traceability of quality are: improving management quality and safety of production, improving company's image and increasing the company's role in the supply chain (100% totally agree). The main barriers of a traceability system for aquaculture are considered to be the high cost and the lack of policy encouraging (87.50% strongly agree). According to the future specialists in the field, the decision to buy fishery products (agree, strongly agree) is less influenced by price (50.89%) and more by storage conditions (86.61%). The results of this study may serve as information material for fishery product traceability system. [ABSTRACT FROM AUTHOR]