Document Type
Article
Publication Date
5-1-2024
Journal / Book Title
ICES Journal of Marine Science
Abstract
Hybridization and introgression are recognized as mechanisms promoting genetic variability during evolutionary radiations. We examined the impact of introgression in the process of speciation, focusing on the Antarctic icefish genus Chionodraco. Our analyses confirmed that the three Chionodraco species (Chionodraco hamatus, Chionodraco myersi, and Chionodraco rastrospinosus) were genetically distinctive, despite signals of past interspecific gene flow between C. hamatus and C. myersi that likely occurred during interglacial periods. However, in this study, no recent hybrids were identified. The lack of contemporary hybridization may be due to life-history traits and the type of marker used in the analysis. Our study emphasizes the importance of genomic approaches to detect subtle patterns of past hybridization accurately and highlights the significance of historical climate events in the demographic and evolutionary history of Antarctic notothenioids. Polar regions, and especially the Antarctic Peninsula, are now experiencing the fastest climate changes due to global warming. Understanding the impact of past climate events is fundamental to trace current modifications in species' genetic variability and distributions and predict future evolutionary trajectories. This knowledge is also vital for conservation efforts, including the implementation of marine protected areas.
DOI
10.1093/icesjms/fsae019
Journal ISSN / Book ISBN
85194948388 (Scopus)
Montclair State University Digital Commons Citation
Schiavon, Luca; Ceballos, Santiago G.; Matschiner, Michael; Trucchi, Emiliano; La Mesa, Mario; Riginella, Emilio; Lucassen, Magnus; Mark, Felix C.; Bilyk, Kevin; Franch, Rafaella; Wallberg, Andreas; Boscari, Elisa; Zane, Lorenzo; and Papetti, Chiara, "Limited interspecific gene flow in the evolutionary history of the icefish genus Chionodraco" (2024). Department of Biology Faculty Scholarship and Creative Works. 472.
https://digitalcommons.montclair.edu/biology-facpubs/472
Published Citation
Luca Schiavon, Santiago G Ceballos, Michael Matschiner, Emiliano Trucchi, Mario La Mesa, Emilio Riginella, Magnus Lucassen, Felix C Mark, Kevin Bilyk, Rafaella Franch, Andreas Wallberg, Elisa Boscari, Lorenzo Zane, Chiara Papetti, Limited interspecific gene flow in the evolutionary history of the icefish genus Chionodraco, ICES Journal of Marine Science, Volume 81, Issue 4, May 2024, Pages 676–686, https://doi.org/10.1093/icesjms/fsae019