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National Repository of Grey Literature 2 records found  Search took 0.00 seconds. 
Effect of the revitalization adjustments of small stream on fish society
 ANTONÍN, Petr
The objective of my work was to consider the effect of the Mlýnský potok revitalization on its fish society. My work is based on the ichtyological researches made before and after the revitalization. The brook is situated at the Šumava mountain between the Lipno reservoir and the border with Austria. The revitalisation had a positive effect on biodiversity, abundance and fish biomass. At the same time are here described individual requirements for successful revitalization water stream and in particular fisches, to the these streams. In my work compare achieved results of postponements fishes of the three tracked brooks Horský, Bukový and Mlýnský
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Changes in abundance of bullhead (Cottus gobio L.) in the Loučka stream near Skryje in 1968-2004
 Humpl, Martin ; Lusk, Stanislav
In the site of the Loučka R., the long-term (1968-2005) monitoring has been realized, always during the autumn period. A part of the Loučka R. was selected and included in the national list of the „European important localities“ for the bullhead Cottus gobio. In the monitored section of the Loučka R., the fish community of salmonid type occurred with dominance of the species brown trout Salmo trutta m. fario, grayling Thymallus thymallus, Cottus gobio and stone loach Barbatula barbatula. The estimated abundance of the bullhead ranged from 128 to 1778 ind.ha-1, means of 504 ind.ha-1. The abundance fluctuations occurred in 10-years’ cycles. The proportion of the bullhead in the total fish abundance ranged from 4% up to 30%. The positive correlation was found between the bullhead abundance and that of grayling and stone loach. The results obtained signalise the need of care in assessing the bullhead population status in the case of less numerous and unsystematic data on abundance.
Detailed record

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