Crossing the Pacific: Genomics Reveals the Presence of Japanese Sardine (Sardinops melanosticta) in the California Current Large Marine Ecosystem

ABSTRACT Recent increases in frequency and intensity of warm water anomalies and marine heatwaves have led to shifts in species ranges and assemblages. Genomic tools can be instrumental in detecting such shifts. In the early stages of a project assessing population genetic structure in Pacific Sardi...

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Bibliographic Details
Published in:Molecular ecology 2024-11, Vol.33 (22), p.e17561-n/a
Main Authors: Longo, Gary C., Minich, Jeremiah J., Allsing, Nicholas, James, Kelsey, Adams‐Herrmann, Ella S., Larson, Wes, Hartwick, Nolan, Duong, Tiffany, Muhling, Barbara, Michael, Todd P., Craig, Matthew T.
Format: Article
Language:English
Subjects:
Animals
California
dispersal
DNA, Mitochondrial - genetics
Ecosystem
fisheries
Fishes - genetics
Genetic structure
Genetics, Population
genome
Genomes
Genomics
Heat waves
Interspecific hybridization
Japan
lcWGS
Marine ecosystems
Nucleotide sequence
Pacific Ocean
Pacific Sardine
Polymorphism, Single Nucleotide - genetics
Population genetics
range shift
Sardines
Sardinops melanostictus
Sardinops sagax
Single-nucleotide polymorphism
Warm water
Whole Genome Sequencing
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Summary:ABSTRACT Recent increases in frequency and intensity of warm water anomalies and marine heatwaves have led to shifts in species ranges and assemblages. Genomic tools can be instrumental in detecting such shifts. In the early stages of a project assessing population genetic structure in Pacific Sardine (Sardinops sagax), we detected the presence of Japanese Sardine (Sardinops melanosticta) along the west coast of North America for the first time. We assembled a high quality, chromosome‐scale reference genome of the Pacific Sardine and generated low coverage, whole genome sequence (lcWGS) data for 345 sardine collected in the California Current Large Marine Ecosystem (CCLME) in 2021 and 2022. Fifty individuals sampled in 2022 were identified as Japanese Sardine based on strong differentiation observed in lcWGS SNP and full mitogenome data. Although we detected a single case of mitochondrial introgression, we did not observe evidence for recent hybridization events. These findings change our understanding of Sardinops spp. distribution and dispersal in the Pacific and highlight the importance of long‐term monitoring programs.
ISSN:0962-1083
1365-294X
1365-294X
DOI:10.1111/mec.17561