Scientific article
Open access

A General Model of Distant Hybridization Reveals the Conditions for Extinction in Atlantic Salmon and Brown Trout

Published inPloS one, vol. 9, no. 7, e101736
Publication date2014

Interspecific hybridization is common in nature but can be increased in frequency or even originated by human actions, such as species introduction or habitat modification, which may threaten species persistence. When hybridization occurs between distantly related species, referred to as ‘‘distant hybridization,'' the resulting hybrids are generally infertile or fertile but do not undergo chromosomal recombination during gametogenesis. Here, we present a model describing this frequent but poorly studied interspecific hybridization to assess its consequences on parental species and to anticipate the conditions under which they can reach extinction. Our general model fully incorporates three important processes: densitydependent competition, dominance/recessivity inheritance of traits and assortative mating. We demonstrate its use and flexibility by assessing population extinction risk between Atlantic salmon and brown trout in Norway, whose interbreeding has recently increased due to farmed fish releases into the wild. We identified the set of conditions under which hybridization may threaten salmonid species. Thanks to the flexibility of our model, we evaluated the effect of an additional risk factor, a parasitic disease, and showed that the cumulative effects dramatically increase the extinction risk. The consequences of distant hybridization are not genetically, but demographically mediated. Our general model is useful to better comprehend the evolution of such hybrid systems and we demonstrated its importance in the field of conservat

  • Hybridization
  • Conservation
  • Genetics
  • Salmonid
  • Competition
  • Modelling
  • Autre - CADMOS
  • Autre - iGE3 student salary award
Citation (ISO format)
QUILODRAN, Claudio, CURRAT, Mathias, MONTOYA BURGOS, Juan Ignacio. A General Model of Distant Hybridization Reveals the Conditions for Extinction in Atlantic Salmon and Brown Trout. In: PloS one, 2014, vol. 9, n° 7, p. e101736. doi: 10.1371/journal.pone.0101736
Main files (1)
Article (Published version)
ISSN of the journal1932-6203

Technical informations

Creation07/21/2014 3:08:00 PM
First validation07/21/2014 3:08:00 PM
Update time03/14/2023 9:28:00 PM
Status update03/14/2023 9:28:00 PM
Last indexation10/18/2023 7:38:45 PM
All rights reserved by Archive ouverte UNIGE and the University of GenevaunigeBlack