National Repository of Grey Literature 5 records found  Search took 0.00 seconds. 
Vliv vybraných těžkých kovů na fyziologii ryb
Šanda, Radek
The study aims on effects of mercury on haematological and biochemical parameters in blood plasma on common carp (Cyprinus carpio L.). The theoretical part of study is focused on phenomenon of occurrence of mercury and its forms in aquatic environment and fish. Practical portion of study includes the effects of administration to mercury and also the effects of co-administration of sodium chloride. In the first experiment we carried out the exposure of Cyprinus carpio L. by selected mercury concentrations for 5, 10 and 15 days. In the second experiments were carps exposed to 1.5 micro g.l-1 mercury with the addition of various concentrations of sodium chloride (29 mg.l-1, 300 mg.l-1 and 1000 mg.l-1) for 72 h. For the evaluation of haematological and biochemical biomarkers in blood plasma of carps, we exploited the Konelab T 20xt and Easy Lyte machines. The obtained data were statistically processed and evaluated.
Phylogeography and dispersal routes of the Proasellus coxalis s.l. (Crustacea: Isopoda)
Koprnická, Markéta ; Sacherová, Veronika (advisor) ; Šanda, Radek (referee)
Dispersal of freshwater invertebrates is affected by many factors. Recently, human activities played a very important role in their dispersal. Among others, constructions of new shipping canals damages natural boundaries and the species can spread into new areas. This Master thesis deal with non-indigenous species P. coxalis s.l. On the genetic bases assess a possible dispersal routes into the Central Europe (and the Czech Republic), and phylogeography of this species in the Czech Republic. I amplified and sequenced DNA of the mitochondrial cytochrome oxidase subunit I (COI) gene and 28S nuclear rDNA gene. 96 individuals from 27 localities in the Czech Republic were analyzed. I also included 40 sequences of the COI gene and 7 of the 28S gene from the GenBank database. In the Czech Republic, there are two different genealogic lineages of P. coxalis (with 6% genetic distance between sequences of the COI gene). The first lineage comes from recent invasion of this species from Mediterranean area (through Western invasion corridor and other shipping canals). The second lineage is probably indigenous in the area and it can probably be assigned to the subspecies P. coxalis septentrionalis. The results are discussed. Keywords: Proasellus coxalis s.l., COI, dispersal routes, phylogeography
Studium vlivu těžkých kovů na biochemický profil u vodních živočichů
Šanda, Radek
This work deals with study of thiol compounds (metallothionein) and the determination of its quantity in the tissues of rainbow trout (Oncorhynchus mykiss). This tissues of the fish were exposed to several concentrations of arsenic. Concentration of metallothionein was measured elektrochemically by using differential pulse voltametry (DPV) by using Brdička's reaction. Metallothionein, which is among the low molecular weight thiols has very strong detoxication effects. Determining of the concentration of this protein could be used to determine the quality and also the health of fish meat.

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