The scale material of the asp (Leuciscus aspius, L., 1758) collected from the Želivka dam between 1971 and 2012 has been processed and evaluated. The samples gathered between 2008 and 2012 have been used to determine the basic growth and population characteristics. In the first place I focused on the shoal spawning analysis. The age of individuals in this analysis ranged between 3+ to 13+, at the body length ranging between 370 to 690 mm. The length of the fish when the scales begin to appear (SL = 29,7 mm) was determined on the base of correlation between the body length and the scale radius. The growth rate in recent years was defined using the technique of back - calculation from the scales. The body length-weight relationship can be described as W = 0,009 ∙ L3,1 . The difference in the growth speed between males and females was minimal and statistically inconclusive. The growth speed of an asp in the Želivka dam is roughly at the same level as all other water reservoirs in Czech Republic.
| Identifer | oai:union.ndltd.org:nusl.cz/oai:invenio.nusl.cz:323629 |
| Date | January 2013 |
| Creators | Bouše, Eduard |
| Contributors | Švátora, Miroslav, Pivnička, Karel |
| 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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