Admixture and Selection Driven by El Niño–Southern Oscillation Events Shape the Genetic Structure of Octopus mimus–O. hubbsorum Complex Across the Humboldt and South Equatorial Current Transition Zone
Jackeline Ruiz‐Mendoza, Vanessa C. Bieker, Jaime G. Morin‐Lagos, Franz Cardoso, Ximena Vélez‐Zuazo, Joanna Alfaro‐Shigueto, Marcial Arellano‐Martínez, Raquel Siccha‐Ramirez, Michael D. Martin, Jorge L. Ramirez · 2026
Read Admixture and Selection Driven by El Niño–Southern Oscillation Events Shape the Genetic Structure of Octopus mimus–O. hubbsorum Complex Across the Humboldt and South Equatorial Current Transition Zone by Jackeline Ruiz‐Mendoza, Vanessa C. Bieker, Jaime G. Morin‐Lagos, Franz Cardoso, Ximena Vélez‐Zuazo, Joanna Alfaro‐Shigueto, Marcial Arellano‐Martínez, Raquel Siccha‐Ramirez, Michael D. Martin, Jorge L. Ramirez (2026) in the Tower of Babel, a free online library of public-domain works preserved in clean, searchable text. No sign-up. The full text is served as a plain-text file at a predictable URL, where text is present: https://antarctic-labs.com/tower-of-babel/pmc-13539069.txt.
Description
Jackeline Ruiz-Mendoza and co-authors study octopus genetics along Pacific currents in a 2026 paper. Two octopus lineages meet off western South America: a warm-water northern form and a cold-water southern form, where the Humboldt and South Equatorial currents cross. Such transition zones act as natural labs for mixing and early species splitting.
Whole-genome data from 67 animals between Mexico and Peru showed the same two-way split in both small and main genomes, plus a broad mixing zone with two admixed groups. The authors link mixing bouts to El Niño events, when ocean barriers relax and the lineages meet again. Which mixed animals survive then depends on their gene mix and local conditions. Gene outlier tests support that story.
Catalog record
| CREATOR | Jackeline Ruiz‐Mendoza, Vanessa C. Bieker, Jaime G. Morin‐Lagos, Franz Cardoso, Ximena Vélez‐Zuazo, Joanna Alfaro‐Shigueto, Marcial Arellano‐Martínez, Raquel Siccha‐Ramirez, Michael D. Martin, Jorge L. Ramirez |
|---|---|
| YEAR | 2026 |
| COLLECTION | PAPERS |
| FORMAT | TXT |
| FILE SIZE | 40 KB |
| VERSION | 1.0 |
| LICENSE | CC BY 4.0 |
| RIGHTS | CC BY |
| SOURCE | Europe PMC |