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National Repository of Grey Literature 2 records found  Search took 0.00 seconds. 
The use of artificial and semi-artificial spawning in the present breeding of common carp
 MARKOVÁ, Aneta
This thesis is focused on the use of artificial and semi-artificial spawning substrates in the current breeding of common carp (Cyprinus carpio, L.) a literature review of this species was processed in relation to reproduction, as well as of the spawning methods (natural, semi-artificial, artificial). Results are drawn from the experimental part (2 spawns: a semi-artificial spawn in the institution for experiments at the Fishery School in Vodňany and an artificial spawn in the fish hatchery at the Research Institute of Fish Culture and Hydrobiology in Vodňany). In both spawns, hormonal stimulation of brood stock was carried out. In the artificial spawning the amount of obtained sex products of individual breeds was assessed. At the same time, a questionnaire survey was conducted at 11 fish-breeding companies engaged in their own production of yolk sac fry. The responses obtained from the survey and findings from the experimental part of spawnings were compared with bibliographic sources which the following conclusions were reached from. It was confirmed that at present a massive carp fingerling production from artificial spawn ensuring optimized conditions dominates over the Dubravius method of semi-artificial spawning which is used only rarely. The production of mirror carp is currently higher than the production of scaly carp. Among the bred mirror breeds the Hungarian mirror carp (M2) prevails, nonetheless it depends on the individual fishery company which form of carp they choose to satisfy the market demand.
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Artificial spawning and semiartificial spawning of pikeperch (Stizostedion lucoperca) in controled conditions for fish farming
 BLECHA, Miroslav
Pikeperch (Stizostedion lucioperca), along with pike (Esox lucius), the main types of supplementary fish reared in pond aquaculture. For its very high quality meat and fish species used by the catering trade. To ensure supply of quality embrií hatching and fish for the needs of fish farmers need to master, and where artificial spawning semiartificiale.
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