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No Population Genetic Structure of Skipjack Tuna (Katsuwonus pelamis) in the Tropical Western and Central Pacific Assessed Using Single Nucleotide Polymorphisms1.90 MB
Published VersionCC BY V4.0, Open Access
Journal article
No Population Genetic Structure of Skipjack Tuna (Katsuwonus pelamis) in the Tropical Western and Central Pacific Assessed Using Single Nucleotide Polymorphisms
Frontiers in Marine Science, Vol.7, pp.1-16
2020
Abstract
Skipjack tuna (Katsuwonus pelamis) has historically been considered panmictic at the ocean basin scale because of the species’ life history and substantial absolute population size. However, recent advances in population genomics have enabled scientists to demonstrate population structure in other species that were likewise traditionally assumed to be panmictic. Accordingly, we used DArTseq, a proprietary platform of reduced-representation genome sequencing developed by Diversity Arrays Technology (DArTech) to genotype 222 skipjack tuna from 9 sample groups collected across 6 exclusive economic zones (EEZs) and over 6 years in the tropical Western and Central Pacific Ocean. This is one of the most fine-scale population genetics assessments of skipjack tuna to date. We found several statistically significant pairwise FST comparisons using purportedly neutral loci, but very little indication of structure based on observed and expected heterozygosity, effective population size, a Mantel test, AMOVA, numerous genetic clustering and population assignment tests, and exploration of correlation with oceanographic features. Significant pairwise FST values were often shallow and resulted in uncertainty about their biological significance. Furthermore, a test of the hypothesis that the geographic and temporal distribution of the potentially adaptive genetic diversity may depict cryptic fine scale structure using two different outlier detection methods, could not reject panmixia based on estimates of fixation indices and two clustering software. Our results support the presence of a single population of skipjack tuna in the tropical Western and Central Pacific Ocean, but highly recommend the expansion of the study area, in latitude, longitude, and seasonality, before drawing any global conclusions.
Details
- Title
- No Population Genetic Structure of Skipjack Tuna (Katsuwonus pelamis) in the Tropical Western and Central Pacific Assessed Using Single Nucleotide Polymorphisms
- Authors
- Giulia Anderson (Author) - University of the South PacificMonal Lal (Author) - University of the Sunshine Coast, Queensland, School of Science and Engineering - LegacyBrian Stockwell (Author) - University of the South PacificJohn Hampton (Author) - Oceanic Fisheries Programme (OFP), Pacific Community, Nouméa, New CaledoniaNeville Smith (Author) - Oceanic Fisheries Programme (OFP), Pacific Community, Nouméa, New CaledoniaSimon Nicol (Author) - Oceanic Fisheries Programme (OFP), Pacific Community, Nouméa, New CaledoniaCiro Rico (Author) - University of the South Pacific
- Publication details
- Frontiers in Marine Science, Vol.7, pp.1-16
- Publisher
- Frontiers Media S.A
- Date published
- 2020
- DOI
- 10.3389/fmars.2020.570760
- ISSN
- 2296-7745
- Copyright note
- Copyright © 2020 Anderson, Lal, Stockwell, Hampton, Smith, Nicol and Rico. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
- Organisation Unit
- School of Science and Engineering - Legacy; Australian Centre for Pacific Islands Research; University of the Sunshine Coast, Queensland; School of Science, Technology and Engineering
- Language
- English
- Record Identifier
- 99502308602621
- Output Type
- Journal article
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- Collaboration types
- Domestic collaboration
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- Web Of Science research areas
- Environmental Sciences
- Marine & Freshwater Biology