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National Repository of Grey Literature 2 records found  Search took 0.01 seconds. 
Study of the state of wels catfish population and its diet in the Římov reservoir in 2018
 Vejřík, Lukáš
Based on the capture of wels catfish using longlines, the aim of the study was: 1. To estimate the abundance of catfish population, over 70 cm TL (total length), in 2017 and 2018. 2. O compare the abundance of catfish, expressed as catch per unit effort, with the other localities surveyed. 3. To determine the average length and weight of catfish. 4. To determine the proportion of artificially introduced and naturally stocked catfish into the reservoir. 5. To determine the annual growth of catfish on the basis of the catches of stocked pit tagged catfish and the size of the catfish identified in catches in 2017. 6. To evaluate the diet of catfish according to the stomach content analyses for 2017 and 2018.
Detailed record
Survey of the catfish population in the Klíčava reservoir in 2018
 Vejřík, Lukáš
Based on the capture of wels catfish using longlines, the aim of the study was: 1. To estimate the abundance of the catfish population, individuals over 70 cm TL (total length). 2. To compare the abundance and size of catfish, expressed as the catch per unit of effort, with the other reservoirs surveyed under the management of the Vltava River Authority state enterprise (Žlutice and Římov). 3. To determine the average length and weight of catfish. 4. To evaluate the diet of catfish according to the stomach content analyses.
Detailed record

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