Assessing Genetic Variation in Wild and Domesticated Pikeperch Populations: Implications for Conservation and Fish...

Area of Science:

• Aquaculture
• Fisheries Science
• Conservation Genetics

Background:

• Pikeperch (Sander lucioperca) is a valuable freshwater/brackish fish species for European aquaculture.
• Wild pikeperch populations are declining due to human activities.
• Understanding genetic status is crucial for establishing effective breeding programs.

Purpose of the Study:

• To assess and compare genetic variability between wild and domesticated pikeperch populations.
• To develop an efficient microsatellite multiplex tool for genotyping.
• To infer phylogeographic relationships using cytochrome b gene sequences.

Main Methods:

• Microsatellite multiplex genotyping of 13 domesticated and 8 wild pikeperch populations.
• Analysis of partial cytochrome b gene sequences.
• Comparative evaluation of genetic diversity and inbreeding levels.

Main Results:

• Domesticated pikeperch populations generally maintain genetic diversity comparable to wild populations and show no significant inbreeding.
• Nuclear data reveal at least two genetically distinct pikeperch groups in Europe: Northern/Baltic and Central European.
• Hungarian populations form a distinct genetic stock within the Central European group.
• Most aquaculture broodstocks originate from a single genetic source.

Conclusions:

• Aquaculture can maintain genetic diversity in pikeperch, but broodstock management needs careful consideration.
• Distinct European genetic groups necessitate tailored conservation and management strategies.
• The genetic distinctiveness of Hungarian pikeperch highlights the need for specific conservation efforts.