Complementarity and discriminatory power of genotype and otolith shape in describing the fine-scale population structure of an exploited fish, the common sole of the Eastern English Channel

16833 7 92097 2 267025 document 92097 journal.pone.0241429.pdf application/pdf b560ce355d2dbcf27c59ef6a7ff62de4 MD5 1356448 2020-11-09 15:22:35 https://pure.iiasa.ac.at/id/eprint/16833/1/journal.pone.0241429.pdf 16833 1 1 application/pdf text en public cc_by_4

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http://eprints.org/relation/isVersionOf https://pure.iiasa.ac.at/id/document/92097 http://eprints.org/relation/isVolatileVersionOf https://pure.iiasa.ac.at/id/document/92097 http://eprints.org/relation/issmallThumbnailVersionOf https://pure.iiasa.ac.at/id/document/92097 archive 353 disk0/00/01/68/33 2020-11-09 15:25:02 2021-08-27 17:33:50 2020-11-09 15:25:02 article show Mourier J. Randon M. Le Pape O. Ernande B. 7797 Mahé K. Volckaert F.A.M. Petit E.J. Lassalle G. Le Berre T. Réveillac E. Complementarity and discriminatory power of genotype and otolith shape in describing the fine-scale population structure of an exploited fish, the common sole of the Eastern English Channel pub prog_eep Marine organisms show population structure at a relatively fine spatial scale, even in open habitats. The tools commonly used to assess subtle patterns of connectivity have diverse levels of resolution and can complement each other to inform on population structure. We assessed and compared the discriminatory power of genetic markers and otolith shape to reveal the population structure on evolutionary and ecological time scales of the common sole (Solea solea), living in the Eastern English Channel (EEC) stock off France and the UK. First, we genotyped fish with Single Nucleotide Polymorphisms to assess population structure at an evolutionary scale. Then, we tested for spatial segregation of the subunits using otolith shape as an integrative tracer of life history. Finally, a supervised machine learning framework was applied to genotypes and otolith phenotypes to probabilistically assign adults to subunits and assess the discriminatory power of each approach. Low but significant genetic differentiation was found among subunits. Moreover, otolith shape appeared to vary spatially, suggesting spatial population structure at fine spatial scale. However, results of the supervised discriminant analyses failed to discriminate among subunits, especially for otolith shape. We suggest that the degree of population segregation may not be strong enough to allow for robust fish assignments. Finally, this study revealed a weak yet existing metapopulation structure of common sole at the fine spatial scale of the EEC based on genotypes and otolith shape, with one subunit being more isolated. Our study argues for the use of complementary tracers to investigate marine population structure. 2020-11-05 published Public Library of Science (PLoS) 10.1371/journal.pone.0241429 1238 public PLoS ONE 15 11 e0241429 TRUE 1932-6203 FALSE no info:eu-repo/semantics/article