Authors: P Berrebi D Jesenšek A J Crivelli
Publish Date: 2016/08/12
Volume: 785, Issue: 1, Pages: 277-291
Abstract
The endemic marble trout Salmo trutta marmoratus suffered massive stocking with brown trout in Slovenia and Italy In the Soča River Slovenia longterm surveys have evidenced Danubian and Atlantic introgressions The observation of discrepancies between introgression frequencies when using morphology mitochondrial sequences allozymes or microsatellites markers led to reanalyze the hybrid population of the Soča River New analyses on diachronic samples of the Soča hybrid populations was performed genotyping partly the same individuals on one diagnostic allozyme LDHC1 eight microsatellite and one mitochondrial loci The confirmed discrepancies led to interpret the anomaly as the consequence of ancient natural immigration of Danubian trout by rivers captures together with stocking with Atlantic domestic trout Management consequences are discussed because the natural Soča inhabitant which was thought to be a pure marble trout should be now changed into a natural hybrid lineage accepting few Danubian allelesThe authors are grateful to Simona Sušnik Bajec who provided the two Danubian river samples They also thank Bernard Lasserre Sophie Dubois Zhaojun Shao for their technical help in microsatellite genotyping as well as Corinne Cherbonnel and David Schikorski Genindexe private company for producing a part of the microsatellite genotypes The enzymatic genotypes were produced by Ghislaine CattaneoBerrebi The fish sampling was undertaken by the team of the Tolmin Angling Association all of them are warmly thanked for their work
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