Molecular phylogenetics reveals the evolutionary history of marine fishes (Actinopterygii) endemic to the subtropical islands of the Southwest Pacific

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dc.citation.volume176
dc.contributor.authorSamayoa AP
dc.contributor.authorStruthers CD
dc.contributor.authorTrnski T
dc.contributor.authorRoberts CD
dc.contributor.authorLiggins L
dc.coverage.spatialUnited States
dc.date.accessioned2023-12-15T01:34:18Z
dc.date.accessioned2024-07-25T06:36:54Z
dc.date.available2022-07-14
dc.date.available2023-12-15T01:34:18Z
dc.date.available2024-07-25T06:36:54Z
dc.date.issued2022-11
dc.description.abstractRemote oceanic islands of the Pacific host elevated levels of actinopterygian (ray-finned fishes) endemism. Characterizing the evolutionary histories of these endemics has provided insight into the generation and maintenance of marine biodiversity in many regions. The subtropical islands of Lord Howe, Norfolk, and Rangitāhua (Kermadec) in the Southwest Pacific are yet to be comprehensively studied. Here, we characterize the spatio-temporal diversification of marine fishes endemic to these Southwest Pacific islands by combining molecular phylogenies and the geographic distribution of species. We built Bayesian ultrametric trees based on open-access and newly generated sequences for five mitochondrial and ten nuclear loci, and using fossil data for time calibration. We present the most comprehensive phylogenies to date for marine ray-finned fish genera, comprising 34 species endemic to the islands, including the first phylogenetic placements for 11 endemics. Overall, our topologies confirm the species status of all endemics, including three undescribed taxa. Our phylogenies highlight the predominant affinity of these endemics with the Australian fish fauna (53%), followed by the East Pacific (15%), and individual cases where the closest sister taxon of our endemic is found in the Northwest Pacific and wider Indo-Pacific. Nonetheless, for a quarter of our focal endemics, their geographic affinity remains unresolved due to sampling gaps within their genera. Our divergence time estimates reveal that the majority of endemic lineages (67.6%) diverged after the emergence of Lord Howe (6.92 Ma), the oldest subtropical island in the Southwest Pacific, suggesting that these islands have promoted diversification. However, divergence ages of some endemics pre-date the emergence of the islands, suggesting they may have originated outside of these islands, or, in some cases, ages may be overestimated due to unsampled taxa. To fully understand the role of the Southwest Pacific subtropical islands as a 'cradle' for diversification, our study advocates for further regional surveys focused on tissue collection for DNA analysis.
dc.description.confidentialfalse
dc.edition.editionNovember 2022
dc.format.pagination107584-
dc.identifier.author-urlhttps://www.ncbi.nlm.nih.gov/pubmed/35843570
dc.identifier.citationSamayoa AP, Struthers CD, Trnski T, Roberts CD, Liggins L. (2022). Molecular phylogenetics reveals the evolutionary history of marine fishes (Actinopterygii) endemic to the subtropical islands of the Southwest Pacific.. Mol Phylogenet Evol. 176. (pp. 107584-).
dc.identifier.doi10.1016/j.ympev.2022.107584
dc.identifier.eissn1095-9513
dc.identifier.elements-typejournal-article
dc.identifier.issn1055-7903
dc.identifier.number107584
dc.identifier.piiS1055-7903(22)00197-X
dc.identifier.urihttps://mro.massey.ac.nz/handle/10179/70544
dc.languageeng
dc.publisherElsevier Inc
dc.publisher.urihttps://www.sciencedirect.com/science/article/pii/S105579032200197X
dc.relation.isPartOfMol Phylogenet Evol
dc.rights(c) The author/sen
dc.rights.licenseCC BY-NC-NDen
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/4.0/en
dc.subjectEndemism
dc.subjectMulti-locus data
dc.subjectOceanic islands
dc.subjectRay-finned fishes
dc.subjectSouthwest Pacific
dc.subjectTime-calibrated phylogeny
dc.subjectAnimals
dc.subjectAustralia
dc.subjectBayes Theorem
dc.subjectBiodiversity
dc.subjectFishes
dc.subjectPhylogeny
dc.titleMolecular phylogenetics reveals the evolutionary history of marine fishes (Actinopterygii) endemic to the subtropical islands of the Southwest Pacific
dc.typeJournal article
pubs.elements-id454957
pubs.organisational-groupOther
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