Search

Start Over Creator Lusk, Stanislav Creator Šlechta, Vlastimil Language English Type article

2. Characteristics of the remnant Vimba vimba population in the upper part of the Dyje River

Creator:
Lusk, Stanislav, Lusková, Věra, Halačka, Karel, Šlechtová, Věra, and Šlechta, Vlastimil
Type:
article and TEXT
Subject:
small population and genetic and population characteristics
Language:
English
Description:
The population and genetic profiles of a remnant Vimba vimba population in the upper course of the River Dyje (N=48°53 ́18 ́ ́/ E=15°39 ́29 ́ ́) was carried out to provide a basis for conservation measures. This population is an isolated fragment of a more widespread population in this river system and is now declining. It came into being 60 years ago as a consequence of the construction of the Vranov dam in the middle section of the River Dyje. Over those 60 years V. vimba disappeared from the other localities of the River Dyje basin. In the population under study, vimba is a single-batch spawner involving two age groups of fishes (4 to 5 years of the age). Individuals over six years of age are rare and sporadically occurring fishes of 8 to 10 years are exclusively females. The size of the adult part of population is less than one thousand individuals. The length growth rate is relatively high as compared with other studied populations in the Czech Republic, fishes of five years attain 200 mm of Sl. A very low genetic variability was evidenced in the population (mean number of alleles per locus = 1.30 ± 0.1; percentage of polymorphic loci = 16.7 %; mean observed heterozygosity = 0.022 ± 0.011).
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/

3. Intraspecific allozyme diversity of Gobio gobio in Czech and Slovak rivers

Creator:
Šlechtová, Věra, Lusková, Věra, Šlechta, Vlastimil, Halačka, Karel, Lusk, Stanislav, and Koščo, Ján
Type:
article and TEXT
Subject:
common gudgeon, genetic variability, and population differences
Language:
English
Description:
Sample of Gobio gobio from 30 localities in the Czech Republic and Slovak Republic were studied. Starch gel electrophoresis was used for evaluation of variability of allozyme patterns in 16 active protein systems comprising 26 loci. Products of 17 loci were considered to study the genetic structure of its populations. From this, genetic variability was found in ten loci, occurrence of rare alleles was detected in next four loci. Percentage of polymorphic loci ranged between 6 and 41%; mean occurrence of alleles was between 1.1 and 2.0 per locus; and mean heterozygosity was observed at 0.013 to 0.248. The genetic distances among populations were 0.002 to 0.175 (N e i 1972) and 0.063 to 0.385 (C a v a l l i - S f o r z a & E d w a r d s 1967). Differences in occurrence and frequencies of alleles in some loci among the sea basins were evident. Higher genetic variability identified in populations from the Danube river system (Black See basin) is probably connected with the fact that this basin served as a refuge for ichthyofauna during glaciations.
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/