Complex patterns of genetic population structure in the mouthbrooding marine catfish, Bagre marinus , in the Gulf of Mexico and U.S. Atlantic.

Autor: Portnoy DS; Marine Genomics Laboratory, Department of Life Sciences Texas A&M University - Corpus Christi Corpus Christi Texas USA., O'Leary SJ; Department of Biological Sciences Saint Anselm College Manchester New Hampshire USA., Fields AT; Marine Genomics Laboratory, Department of Life Sciences Texas A&M University - Corpus Christi Corpus Christi Texas USA., Hollenbeck CM; Marine Genomics Laboratory, Department of Life Sciences Texas A&M University - Corpus Christi Corpus Christi Texas USA., Grubbs RD; Florida State University Coastal and Marine Laboratory St. Teresa Florida USA., Peterson CT; Florida State University Coastal and Marine Laboratory St. Teresa Florida USA., Gardiner JM; New College of Florida Sarasota Florida USA., Adams DH; Florida Fish and Wildlife Conservation Commission Fish and Wildlife Research Institute, Indian River Field Lab Melbourne Florida USA., Falterman B; Fisheries Research Support Mandeville Louisiana USA., Drymon JM; Mississippi State University Coastal Research and Extension Center Biloxi Mississippi USA.; Mississippi-Alabama Sea Grant Consortium Ocean Springs Mississippi USA., Higgs JM; Center for Fisheries Research and Development The University of Southern Mississippi Ocean Springs Mississippi USA., Pulster EL; U.S. Geological Survey, Columbia Environmental Research Center Columbia Missouri USA.; College of Marine Science University of South Florida St. Petersburg Florida USA., Wiley TR; Havenworth Coastal Conservation Palmetto Florida USA., Murawski SA; College of Marine Science University of South Florida St. Petersburg Florida USA.
Jazyk: angličtina
Zdroj: Ecology and evolution [Ecol Evol] 2024 Jun 09; Vol. 14 (6), pp. e11514. Date of Electronic Publication: 2024 Jun 09 (Print Publication: 2024).
DOI: 10.1002/ece3.11514
Abstrakt: Patterns of genetic variation reflect interactions among microevolutionary forces that vary in strength with changing demography. Here, patterns of variation within and among samples of the mouthbrooding gafftopsail catfish ( Bagre marinus , Family Ariidae) captured in the U.S. Atlantic and throughout the Gulf of Mexico were analyzed using genomics to generate neutral and non-neutral SNP data sets. Because genomic resources are lacking for ariids, linkage disequilibrium network analysis was used to examine patterns of putatively adaptive variation. Finally, historical demographic parameters were estimated from site frequency spectra. The results show four differentiated groups, corresponding to the (1) U.S. Atlantic, and the (2) northeastern, (3) northwestern, and (4) southern Gulf of Mexico. The non-neutral data presented two contrasting signals of structure, one due to increases in diversity moving west to east and north to south, and another to increased heterozygosity in the Atlantic. Demographic analysis suggested that recently reduced long-term effective population size in the Atlantic is likely an important driver of patterns of genetic variation and is consistent with a known reduction in population size potentially due to an epizootic. Overall, patterns of genetic variation resemble that of other fishes that use the same estuarine habitats as nurseries, regardless of the presence/absence of a larval phase, supporting the idea that adult/juvenile behavior and habitat are important predictors of contemporary patterns of genetic structure.
Competing Interests: The authors have no conflict of interest to declare.
(© 2024 The Author(s). Ecology and Evolution published by John Wiley & Sons Ltd.)
Databáze: MEDLINE
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