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Invasive aquatic species

Dagsetning: 
Þriðjudagur, September 5, 2017 -
12:30 to 14:00
Nánari staðsetning: 
N - 131

Two scientists from Poland present their research on invasive aquatic species:

1. DNA barcoding in fish species identification and protection - Remigiuzs Panicz, PhD, Eng, West Pomeranian University of Technology, Szczecin

Reliable database of genetic profiles is a critical issue towards accurate identification of fish species. Within last decade several national and international programs have been launched and repositories developed. The most widely appreciated initiative, The Fish Barcode of Life, dedicated to catalogue fish species based on sequencing of COI region and miscellaneous information (e.g.: geographic position, photography, biometry). Other projects aimed at mainly developed as a tool to support fish identification and monitor trade within European Union. Each database that collects fish DNA barcodes, whether was developed to support identification of mislabeling in supply chain, also provides unlimited opportunities for protection of natural fish assemblages. However to characterize population structure or identify cryptic species database should contain appropriate number of samples collected for each species randomly selected across distribution area. Development of next generation sequencing (NGS) techniques pave the way for the next stage of fish barcoding technology, which provides huge amounts of sequential data generated on DNA isolates from environmental tests basis. The result of fusion between the High Throughput DNA Sequencing and barcoding (metabarcoding) has revolutionized DNA-based species identification, including identification based on the environmental DNA.

 

2. Problem of invasive crayfish species in Poland and active protection of the native noble crayfish Astacus astacus - Prof. Przemysław Śmietana, PhD, Eng. - Institute for Research on Biodiversity, University of Szczecin

Noble crayfish (Astacus astacus L.) was a common and widespread freshwater crustacean species in Poland in beginning of XX century. Since this time a relatively rapid decreasing of noble crayfish abundance has been reported. Nowadays, A. astacus has status of critically endangered species, with only 27 wild populations survived in the Pomerania region (NW Poland). As a result, it can be concluded that it is too late to only protect the species, which needs to be rescued now. For this reason, the method utilising a breeding restocking material was elaborated at the Institute for Research on Biodiversity of the University of Szczecin in Poland.The method allows to increases the crayfish survival rate during the first year of life (YOY) from 5% (in the wild) to 95% (under the breeding conditions). The surplus of YOY is designed for restocking purposes. About 7000 individuals of A. astacus bred in this way are released to the Pomeranian lakes (3-5) annually to restore its wild populations.

 

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