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Conservation Genetics

, Volume 16, Issue 3, pp 717–727 | Cite as

Detecting natural hybridization between two vulnerable Andean pupfishes (Orestias agassizii and O. luteus) representative of the Altiplano endemic fisheries

  • Yareli Esquer-Garrigos
  • Bernard Hugueny
  • Carla Ibañez
  • Claudia Zepita
  • Kellie Koerner
  • Josie Lambourdière
  • Arnaud Couloux
  • Philippe Gaubert
Research Article

Abstract

The detection of hybridization among freshwater fish species is of main concern for conservation programs and fish farming. We assessed the incidence of natural hybridization between two vulnerable species of Andean pupfishes (Cyprinodontidae; Orestias agassizii and O. luteus) that represent an important component of local fisheries. We combined mitochondrial and nuclear DNA sequencing, microsatellites genotyping and morphometrics to characterize hybridization patterns between the two species in lakes Titicaca and Uru Uru (N = 175). The clustering analysis of 10 microsatellite loci together with heterozygosity distribution at seven species-specific diagnostic sites in rhodopsin (nuclear DNA) proved to be a robust diagnostic tool to detect F1 and potential backcross hybrids. For the first time on a genetic basis, we confirmed the incidence of natural hybridization between the two Andean pupfishes, at frequency rates reaching almost 10 %. The morphological intermediacy criterion (relative to parental species) did not apply in hybrids, since the latter (i) deviated through their larger caudal peduncle height, and (ii) had greater, overlapping ranges in their morphometric ratios. Although viable F1 and F2 hybrids between O. agassizii and O. luteus had been reported under controlled conditions, the ecological and/or demographic factors facilitating interspecific gene flow in the wild remain speculative. We recommend that regional fish farming and restocking programs targeting O. agassizii and O. luteus call on the genetic diagnosis of hybrids to avoid the potentially deleterious impacts of releasing hybrid populations in the wild.

Keywords

Andean pupfishes Conservation genetics Hybridization Morphology Orestias agassizii Orestias luteus 

Notes

Acknowledgments

We gratefully acknowledge Alexander Flores, Kelvin Herbas and Ramón Catari for field assistance (UMSA), Claude Ferrara (Direction des Collections, MNHN) for taking photographs of Orestias, and Thierry Oberdorff (UMR BOREA, MNHN) for early stage project management. This research was funded by the program “Action initiative 2008: Diversité des poisons-n°45/Radiation adaptative des Orestias dans les lacs andins”, from the Département Ressources Vivantes-Institut de Recherche pour le Développement, and Agence Nationale de la Recherche (Project “FISHLOSS-ANR-09-PEXT-008). This publication was made possible through support provided by the Institut de Recherche pour le Développement-Département Soutien et Formation to YEG. We thank three anonymous reviewers for their useful comments on an earlier version of this draft. This is publication ISEM 2014-225.

Supplementary material

10592_2015_695_MOESM1_ESM.pdf (10 mb)
Supplementary material 1 (PDF 10190 kb)

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Copyright information

© Springer Science+Business Media Dordrecht 2015

Authors and Affiliations

  • Yareli Esquer-Garrigos
    • 1
  • Bernard Hugueny
    • 1
  • Carla Ibañez
    • 1
    • 2
  • Claudia Zepita
    • 2
  • Kellie Koerner
    • 3
  • Josie Lambourdière
    • 4
  • Arnaud Couloux
    • 5
  • Philippe Gaubert
    • 1
    • 6
  1. 1.UMR BOREA, Département Milieux et Peuplements Aquatiques, MNHN-CNRS 7208-IRD 207-UPMCMuséum National d’Histoire NaturelleParisFrance
  2. 2.Instituto de Ecología-Unidad de LimnologíaUniversidad Mayor de San AndrésLa PazBolivia
  3. 3.LafayetteUSA
  4. 4.Département Systématique et Evolution, SSM-IFR 101Muséum National d’Histoire NaturelleParisFrance
  5. 5.GenoscopeCentre National de SéquençageEvry CedexFrance
  6. 6.Institut des Sciences de l’Evolution de Montpellier (ISEM) - UM2-CNRS-IRDUniversité de MontpellierMontpellier Cedex 05France

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