Genomics-enabled mixed-stock analysis uncovers intraspecific migratory complexity and detects unsampled populations in a harvested fish

Population contributions to annual harvests provide key insights to conservation, especially in migratory species that return to specific reproductive areas and may establish genetically distinct populations. In this context, genetic stock identification (GSI) requires reference samples from source populations, yet sampling might be challenging as reproductive areas could be remote and/or unknown. To investigate intraspecific variation in walleye (Sander vitreus) populations harvested in two large lakes in northern Quebec, we used genotyping-by-sequencing data to develop a panel of 336 single nucleotide polymorphisms. We then genotyped 1465 fish and assessed individual migration distances from GPS records. Samples were assigned to a source population using two methods, one requiring allele frequencies of known populations (RUBIAS) and the other without prior knowledge (STRUCTURE). Individual assignments to a known population reached 93% consistency between both methods in the main lake ..., , , # Genomics-enabled mixed-stock analysis uncovers intraspecific migratory complexity and detects unsampled populations in a harvested fish

[https://doi.org/10.5061/dryad.f1vhhmh62](https://doi.org/10.5061/dryad.f1vhhmh62)

## Description of the data and file structure

| file | Column nb | variable | variable\_type | description |
| :--------------------------------------------- | :-------- | :------------------------------- | :--------------------------- | :-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------...