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Phylogenetic characteristics of selected European huchen (Hucho hucho L.) broodstocks : implication for broodstock management

Kuciński Marcin, Fopp-Bayat Dorota

Oceanological and Hydrobiological Studies

2021

Vol. 50, No. 1

38--46

European huchen (Hucho hucho) is a representative of large and rare migratory salmonid fish, which has become endangered due to extensive anthropogenic changes in freshwater ecosystems. Numerous broodstocks of the European huchen have therefore been established throughout the species’ range in recent years to supplement wild fisheries of this species. Unfortunately, this conservation management strategy entails a number of potential ecological and genetic risks associated with the release of farm-raised fish into wild populations. A comprehensive and feasible genetic monitoring protocol for broodstocks maintained for the production of restocking material is therefore essential in the sustainable management of critically endangered fish species. The current paper presents phylogenetic characteristics of four selected huchen broodstocks across Central and Eastern Europe. Genetic comparisons of the studied broodstocks were based on ten microsatellite DNA markers. The effective population size (Ne), the individual assignment test, the Principal Coordinates Analysis (PCoA), the allele sharing distance (DAS) and the Bayesian clustering analysis were applied in this study. Moreover, five selected fragments of mitochondrial DNA were used for molecular verification of species membership and genetic purity of examined specimens.

Selection of optimal spawner-pairs based on the polymorphism of microsatellite loci in a partially-tetraploid fish species (Coregonus lavaretus)

Kaczmarczyk D., Fopp-Bayat D., Wiśniewska A.

Environmental Biotechnology

2015

Vol. 11, No. 1

20--25

Many species that are in danger of extinction require human support in the form of captive-breeding programs to help maintain their populations in the wild.When breeding in captivity, it is important to select breeding pairs that will create the most genetically diverse progeny. Based on the polymorphism of their microsatellite loci, breeding pairs of diploid land animals have been successfully selected. In this theoretical paper, we asked how to adapt this technique to the selection of spawner pairs for restocking populations of partially tetraploid fish species. To test our calculation techniques, we used actual data on the polymorphism of the loci of captured whitefish (Coregonus lavaretus). The data enabled calculations showing which spawner pairs would create the most genetically diverse cohort of offspring if they were bred. Themethod presented in the paper can be used for breeding fish in aquaculture conditions to help conserve species.