|
|
Migrace jeseterovitých ryb - přehledová studie
GERŽA, Lukáš
In its introductory part, the review study Sturgeon Fish Migration focuses on the introduction to fish migration as such, the systematic distribution of migrations and the main factors influencing migration. As with other migratory fish, the loss of natural habitats and the impassability of watercourses are the greatest threats to sturgeons. Nowadays, there is a great emphasis on sturgeon conservation and rescue projects, either global or regional in scope, are an integral part of this. These are, among other things, the flagship for improving the situation as far as crossing transverse barriers are concerned, thereby improving, restoring and building new functional fish passes, which are also marginally addressed in this study. For proper design and functionality of fish crossings, knowledge of both the biology and ecology of sturgeon fish is required, which are described in detail in this study. This study provides general information on the characteristics of the sturgeon family and focuses on the two genera belonging to this family, which are sturgeon and otter. A large part of the whole work consists of a selection of 11 species of sturgeons, for which reproductive migration, habitat requirements and specific sites (spawning grounds) where sturgeons have historically or currently still naturally reproduce are described.
|
|
|
The proposal fish ladder
Mašínská, Tereza ; Synáčková, Marcela (advisor) ; Soukupová, Jana (referee)
This graduation theses describes the design of the fish ladder at the dam in Brno (district Přízřenice). In the introduction I mentioned migration patterns of fish. For a better understanding outlined and fish behaviour associated with migration, some fish undertake long voyages others migrate only a few meters. Extremely important is that for most species of fish migration is important for their survival, whether breeding or feeding.
Middle part is focused for water structures and water flow, specifically to the list of dams and their distribution from different perspectives. Nowadays the progress should go ahead with nature and technical buildings. The work also has a list of fish ladders with their description and evaluation of suitability.
The last part is dedicated to the design of fish passage in Přízřenice. The weir has been built on a 35,293 river km river Svratka. In this part of the work is summarized description of the location in which it is proposed fish passage. Furthermore, the list of the most abundant fish stocks at a fishing ground Svratka 3.
|
guest ::
