UDTR — Radar mondial des droits de la Nature

Homoploid Hybrid Speciation in a Marine Pelagic Fish

Identification

Clé publique

radar:r-b2bd77ac149647848d57097fd039f44e

Auteurs

Nozomu Muto · Yong‐Chao Su · Harutaka Hata · Nguyen Van Quan · Veera Vilasri · Mazlan Abd. Ghaffar · Ricardo P. Babaran

Année déclarée

2025

Langue déclarée

en

Type source

article

Première détection

2026-11-14T02:14:29.366806+00:00

Dernière observation des métadonnées

2026-11-14T02:14:29.366806+00:00

Dernière vérification HTTP

Non effectuée

Institutions déclarées par la source

Kitasato University · Kaohsiung Medical University · Smithsonian Institution · Okinawa Institute of Science and Technology Graduate University · Vietnam Academy of Science and Technology · Universiti Malaysia Terengganu · University of the Philippines Visayas

Pays d’affiliation déclarés

JP · MY · PH · TW · US · VN

Résumé documentaire — langue originale

Homoploid hybrid speciation (HHS) is an enigmatic evolutionary process where new species arise through hybridisation of divergent lineages without changes in chromosome number. Although increasingly documented in various taxa and ecosystems, convincing cases of HHS in marine fishes have been lacking. This study presents a possible case of HHS in a pelagic marine fish based on comprehensive genomic, morphological, and ecological analyses. Population genomics, species tree estimation, and tests of introgression and admixture identified three sympatric clusters in Megalaspis cordyla in the western Pacific and the admixed nature of one cluster between the others. Moreover, model-based demographic inference favoured a hybrid speciation scenario over introgression for the origin of the admixed cluster. While contemporary gene flow suggested partial reproductive isolation, examination of occurrence data and ecologically relevant morphological characters suggested ecological differences between the clusters, potentially contributing to the reproductive isolation and niche partitioning in sympatry. The clusters are also morphologically distinguishable and thus can be taxonomically recognised as separate species. The hybrid cluster is restricted to the coasts of Taiwan and Japan, where all three clusters coexist. The parental clusters are additionally found in lower latitudes, where they display non-overlapping distributions. Given the geographical distributions, estimated times of species formation, and patterns of historical demographic changes, we propose that the Pleistocene glacial cycles were the primary driver of HHS in this system. We also develop an ecogeographic model of HHS in marine coastal ecosystems, including a novel hypothesis to explain the initial stages of HHS.

Identifiants

OPENALEX

https://openalex.org/W4414357897

DOI

10.1111/mec.70112

PMID

https://pubmed.ncbi.nlm.nih.gov/40970348

Repères documentaires

Famille documentaire

article

Types déclarés par les sources

article

Éditeurs

Wiley

Les mentions d’entités ne constituent pas une preuve de reconnaissance juridique. La juridiction étudiée est distincte du pays d’affiliation des auteurs.

Sources

OpenAlex · Document 1

• Document · https://doi.org/10.1111/mec.70112

Statut documentaire

Pertinence à examiner

Bibliothèque

Cette identité n’est pas encore intégrée à la Bibliothèque juridique.