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National Repository of Grey Literature 2 records found  Search took 0.01 seconds. 
Comparison of survival, growth rate and overall breeding of grass carp (Ctenopharyngodon idella) juveniles in pond and recirculating aquaculture system during winter time.
 PECHER, Petr
The study compared survival and growth rate in grass carp (Ctenopharyngodon idella) juveniles in pond and recirculation aquaculture system (RAS) during winter time. The juveniles of grass carp were stocked to 5 tanks and three ponds during 2013 and 2014. In the RAS, the fish were fed by dry pellets and rearing was in constant temperature. In the pond, the temperature and feeding were only natural. In the RAS, the survival rate was significantly higher 97.79 % 0.52 % compared to 10.94 % 11.42 % in the pond. At the end of experiment, the weight of fish, Specific growth rate (SGR) and Fulton coefficient (FK) was significantly higher in RAS in comparison with the pond. The results showed that the rearing of grass carp is more effective in RAS in comparison with pond during winter time.
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Research January 1947 ÚVVM: Coal-mining, alcoholism, business activities, public holidays, winter time, cinema. B 51, B 51
 Ústav pro výzkum veřejného mínění
Research was initiated by the National cultural court, Association of crafts, Association of Catholics and Planning board. Questions deal with coal-mining problems, alcoholism and abstinence, also with business enterprises, cancellation of public holidays, introduction of winter time and popularity of foreign cinemas.
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