Barbel (Barbus barbus L.) is autochthonous species with batch-spawning, incident in the whole territory in the Czech republic. Number of this species was decrease markedly at last thirty years ago. Continual fish production is possible obtained to creation breeding under controlled conditions. Aim of thesis was detect basic characteristics of reproduktion under controlled conditions in fish breeding object VÚHR JU Vodňany. Fertilization, hatching performance was detect and quality offspring by osmotic test subsequently. These realized valuables about domesticated barbel were compared with same valuables hormonal induce ovulation adult fish and with valuables in spawning barbel directly in place of catching. The best results fertilization, hatching performance and resistance of larvae were reached in barbel spawning after cathing fish in the river Doubrava (Čáslavsko). After that follows group fish treated by hormonal preparation in the hatchery in Třebíč. Domesticated barbel spawning from January to June in periodic intervals, but their characteristics of reproduction are the worst demonstrably.
| Identifer | oai:union.ndltd.org:nusl.cz/oai:invenio.nusl.cz:48876 |
| Date | January 2008 |
| Creators | VAVREČKA, Antonín |
| Source Sets | Czech ETDs |
| Language | Czech |
| Detected Language | English |
| Type | info:eu-repo/semantics/masterThesis |
| Rights | info:eu-repo/semantics/restrictedAccess |
Page generated in 0.002 seconds