The aim of presented work was a study of the effect of temperature on the development of mature oocytes of sterlet during prespawn period. At the turn of 2013 and 2014 was conducted our experiment with females of sterlet. Experimental fish were divided into two main groups. The first group was exposed to the heated water and a second group was kept in natural water temperature. Four biopsies were carried out during attempt. The samples were measured, and then was calculated oocyte polarization index (PI). For more accurate results processing fish were divided into two subgroups within both groups. 1st subgroups had at first biopsy PI 12.5 % and 2 subgroups PI> 12.5 %. In less mature females the effect of temperature was statistically significant (p < 0.05) while in more mature females the opposite was true (p > 0.05). From a total assessment follows that the temperature had no significant importance for the rate of oocytes maturation (p > 0.05). Experimental results indicate that the heating method can be used to accelerate the maturation especially in less mature fish and for synchronization spawning.
| Identifer | oai:union.ndltd.org:nusl.cz/oai:invenio.nusl.cz:252927 |
| Date | January 2016 |
| Creators | MATĚJKOVÁ, Jindřiška |
| Source Sets | Czech ETDs |
| Language | Czech |
| Detected Language | English |
| Type | info:eu-repo/semantics/masterThesis |
| Rights | info:eu-repo/semantics/restrictedAccess |
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