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National Repository of Grey Literature 2 records found  Search took 0.00 seconds. 
Adaptibilita lipana podhorního (Thymallus thymallus) po vysazení v závislosti na technologii odchovu
 Pospíšil, Kryštof
The diploma thesis is focused on the adaptation of Europen grayling after stocking. Within of this diploma thesis, 3 different technologies of breeding were compared. The group marked grayling stock was monitored at trout fishing ground the Oslava 6 at 4 locations in 2021-2022. Recapture of marked grayling was carried out using electrofishing and fishing with an artificial fly (fly-fishing). During the catches, were acquired the physical-chemical parameters of the water and the length-weight parameters of the fish caught, for the subsequent determination of the nutrition coefficient according to Fulton and the AT coefficient according to Spurný (2000). The abundance and biomass of the fish community was subsequently determined from the recorded data. As part of electrofishing, zoobenthos was collected from all localities, and after laboratory determination, its abundance and biomass were examined. The degree of adaptation of stocked grayling was assessed from the percentage representation of the food component (natural food) from the stomach contents. Stomach contents were collected by a non-lethal method using a stomach pump or a modified syringe. The results show that the stock from each technology of breeding has adapted to the natural food offer, but the amount of data obtained may distort the results.
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Backflow of catchs on trout district in river - basin of upper Vltava
 ŠMÍD, Pavel
Backflow of catchs on trout district is important indicator of fishing maintenance. On trout district were to be in former times given stool duties betray into order about usage of district. Planned fish stocking has becomingly complete structure of original fish guilds in district with old availability. Objektive of work will be review in agreement with fishing statistician level of maintenance on district by indicator of backflow catch in piece and weight , but also in agreement with structure of valuable and additional, eventually harmful kinds of fishs. Useful information follow also from fishing pressure (visit rate) on fishing district. Important ratings are also segmentation of district, number of migration road-block, flow of water, type of gout near coast, segmentation of stream, bolthole capacity, vegetative company etc . Therefore will serviceable separate up under consideration districts in river - basin of upper Vltava also accordance with these characteristics in mountain and piedmont zone of southern Czech. Conclusion of work will contain draft of measures destined to improvement maintenance of trout districts.
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