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National Repository of Grey Literature 2 records found  Search took 0.00 seconds. 
Impact of nutrition and rearing technology on the changes of the quality of common tench (Tinca tinca) meat
 PŘÍBORSKÝ, Josef
The aim of the study was to determine the impact of diet (natural and formulated feed) on the chemical composition and fatty acids profile of the harvested fish. The content of dry matter in fish flesh resulting from the formulated diet was higher vs. the natural diet (23.94?1.24 % vs. 19.66?0.82 %) with nitrogenous compounds (60.24?2.82 % vs. 72.12?1.75 %), total fat content (24.81?4.51 % vs. 6.14?2.85 %) and ash (7.55?1.28 % vs. 10.54?1.53 %) respectively. The spectrum of fatty acids was determined by gas chromatography using Varian 3800 equipment. Tench fed on a formulated diet in the recirculating system had a significantly higher content (P< 0.05) of monounsaturated fatty acid (MUFA = 43.04?1.68 %) and n-6 polyunsaturated fatty acids (PUFA = 15.47?1.07 %) in their flesh compared to the flesh of fish reared in earth ponds on a natural diet - MUFA (32?5.29 %) and n-6 PUFA (13.6?1.66 %). Tench fed on a natural diet in earth ponds proved to have a significantly higher content (P< 0.05) of n-3 PUFA (16.8?4.38 %) and ? PUFA (30.3 ? 5.3 %) than tench reared in the recirculating system - PUFA n-3 (10.05?0.85 %) and ? PUFA (25.52?1.07%). The ratio n-3/n-6 for fish from earth ponds was 1.2; for fish from the recirculating system the ratio was 0.65. The results show a significantly higher composition of n-3 PUFA in flesh of tench from earth pond with natural food compared to fish on an intensive feeding diet in the recirculating system which showed a higher content of n-6 PUFA.
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Exercise aquaculture production in the Czech Republic
 PŘÍBORSKÝ, Josef
This work evaluate dynamic properties of production of Czech market fish in the last decade of twenties century and the beginning of twentyonce century first together. Then separately by several fish species, by using of them (home trade and export, sale in vivo or processed) and evaluate causes of these changes. It uses resources mainly from the Czech Fish Union in České Budějovice, from customs statistics and Czech Ministry of Agriculture. Carp is the most breeded fish, in the market dominate the native fish. In term of consumption is trout the second most significant fish. Without carp are stocked also less amount of supplementary fish. Freshwater fish, by results, stabilize their own position on the Czech market. Also important is export into other European countries, where successfully compete especially by quality of carp meet.
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7 Příborský, Jan
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