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Converting of juvenile zander (Sander lucioperca) to artificial diet (preliminary results)
Baránek, V. ; Mareš, J. ; Prokeš, Miroslav ; Jirásek, J. ; Spurný, P.
Weaning success of pond-reared zander (Zander lucioperca) fry was evaluated using three different converting methods: direct converting to dry feed (Bio-Optimal Start 0.5-0.8 mm) – variant A, three– day application of semi-moist feeding mixture on the base of fish – variant B and three-day application of semi-moist mixture + three-day co-feeding of semi-moist mixture and dry feed. These methods were evaluated regarding specific growth rate (SGR), Fulton´s factor of weight condition (FWC), survival and cannibalism. The average onset total length of fish was 35.22 ± 2.15 mm and the average individual weight was 0.31 ± 0.05 g. There were 600 individuals in each circular tank. The initial stock density was 0.62 g.l-1 (2 fish.l-1). The water temperature during this experiment fluctuated in intervals 22 – 24oC. Fish survival during a 14-day period of rearing ranged from 34.33% [C] to 50.33% [A]. Variant A and B were achieved better weaning performance than variant C regarding all parameters.
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Several biological characteristic of Carassius auratus
Vetešník, Lukáš ; Lusk, Stanislav ; Spurný, P.
Based on realized research it was found that the present population of Carassius auratus occurred in the lower reach of the river Dyje does not have any significant differences in plastic and meristic characters when compared to the individuals occupying this area 27 years ago. The growth depends on the living conditions of studied individuals. The growth of 2n males was significantly slower comparing to 3n females.
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Growth of the sterlet (Acipenser ruthenus) under conditions of Pohořelice Pond Fisheries
Baránek, V. ; Prokeš, Miroslav ; Baruš, Vlastimil ; Peňáz, Milan ; Mareš, J. ; Spurný, P. ; Němec, R.
Growth results of the sterlet (Acipenser ruthenus) reared at the Pohořelice Pond Fisheries were observed in 2003 and 2004 and subsequently analysed. During the period 28 July ů 2 September 2003 a feeding experiment (sterlet of age 1+ and 4+, 5+) was performed in which very good growth parameters were achieved: In the age category 1+ (initial mean weight of 99,5; 71,2 and 53,8 g) using DFR 1,6; 1,7; 2,1 % respectively, SWGR 1,02; 1,36; 0,91 %.d-1 , respectively and FCR 1,45; 1,10 and 2,38, respectively. In the age category 4+, 5+ (initial mean weight of 316,9; 375,0 and 478,85 g) using DFR 1,3; 1,1 and 0,9 %, respectively, SWGR 0,88; 0,73 and 0,59 %.d-1 , respectively and FCR 1,35; 1,39 and 1,42, respectively. On the basis of these results, sterlet may be considered to be an appropriate fish for intensive aquaculture and, as a native species for the Czech Republic, also for stocking into Czech running waters.
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Rearing of the zander (Sander lucioperca) stock material under controlled conditions (preliminary results)
Baránek, V. ; Mareš, J. ; Spurný, P. ; Prokeš, Miroslav ; Baruš, Vlastimil ; Němec, M.
The aim of this study was to check the possibilities of exploitation of summer zander (Sander lucioperca) fry for production of stock material under controlled conditions. Two groups of these fish were converted from natural diet to artificial diet using the semi-moist feeding mixtures (variant A) and trout feed (Dan-Ex 1352 - variant B). The average total length of imported fish was 44,3 mm and the average idividual weight was 0,606 g. There were 255 individuals in each tank. The initial stock density was 2,34 g.l-1 (3,86 ks.l-1). The water temperarute during this experiment fluctuated in intervals 21 ů 23 oC. Our simple experiment confirmed possibility of exploitation of summer zander fry to intensive rearing of stock material.
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Technologies for storing and processing of extremely large volumes of data in the ORACLE
Spurný, Petr ; Macák, Petr (advisor) ; Krch, David (referee)
The aim of the Bachelor's thesis is to provide an overview and description of such technologies in the Oracle database, which can be used for work with extremely large volumes of data and to verify the benefits of some of these technologies in practice. At the beginning, the work deals with problems of large amounts of data in general and seeks to define the size of data in the database systems. In the theoretical part, several different technologies will be introduced. The greatest emphasis is placed on various forms of partitioning. The practical part contains a proposal for the implementation of tests, building automated test procedures, and for the execution of these tests. The work can be used as a quick guide in case of dealing with performance issues with large volumes of data. Making any changes for the particular case is easy according to examples given in the text. Last, but not least, the work may help with automatic testing procedures, which can be used with a slight adjustment for a wide range of test cases.
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