Seasonal variation in genetic population structure of sábalo (Prochilodus lineatus) in the Lower Uruguay River

EVA C. RUEDA; PEDRO CARRIQUIRIBORDE; ALEXANDER M. MONZÓN; GUSTAVO M. SOMOZA; GILLERMO ORTÍ

GENETICA

SPRINGER

Lugar: Berlin; Año: 2013 vol. 141 p. 401 - 407

0016-6707

Prochilodus lineatus is a highly migratory fish species that sustains the most importantcommercial fishery of Paraná-Paraguay basin. Migratory patterns are poorly known andonly few population genetic studies are available for this species in the Upper Paraná. Toassess genetic population structure, we genotyped a sample of 93 individuals from theLower Uruguay River close to Gualeguaychú city (Entre Ríos, Argentina) at three differenttimes, July 2008 (Winter), September 2008 (Spring) and May 2009 (Fall). All individualswere genotyped for 12 loci microsatellite loci previously found to be informative to assesspopulations of Prochilodus lineauts. Our results show seasonal variation of the geneticsub-structuring at this locality that may be related to the presence of different migratorystocks throughout the year. The Fall sample includes an additional genetic cluster ofindividuals not detected in Winter and Spring, suggesting that this species should beconsidered a mixed stock fishery.