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    Anisotropic larval connectivity and metapopulation structure driven by directional oceanic currents in a marine fish targeted by small-scale fisheries

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    Munguia-VegaETAL2018.pdf
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    Description:
    Final Accepted Manuscript
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    Author
    Munguia-Vega, Adrian
    Marinone, S. Guido
    Paz-Garcia, David A.
    Giron-Nava, Alfredo
    Plomozo-Lugo, Tomas
    Gonzalez-Cuellar, Ollin
    Weaver, Amy Hudson
    García-Rodriguez, Francisco J.
    Reyes-Bonilla, Hector
    Affiliation
    Univ Arizona, Sch Nat Resources & Environm, Conservat Genet Lab
    Issue Date
    2018-01
    
    Metadata
    Show full item record
    Publisher
    SPRINGER HEIDELBERG
    Citation
    Munguia-Vega, A., Marinone, S.G., Paz-Garcia, D.A. et al. Mar Biol (2018) 165: 16. https://doi.org/10.1007/s00227-017-3267-x
    Journal
    MARINE BIOLOGY
    Rights
    © Springer-Verlag GmbH Germany, part of Springer Nature 2017.
    Collection Information
    This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.
    Abstract
    The dispersal during the planktonic larval period is a key feature to understand the metapopulation structure of marine fishes, and is commonly described by four general models: (1) lack of population structure due to extensive larval dispersal; (2) isolation by geographic distance, where larval connectivity decreases with increasing distance between sites in all directions (isotropy); (3) population structure without any clear geographic trend (chaotic); and (4) population structure explained by seascape approaches that explicitly incorporate the spatial and temporal variations in the direction and strength of oceanic currents via oceanographic modeling. We tested the four models in the Pacific red snapper Lutjanus peru, a key commercial species in the Gulf of California (GC), Mexico. We genotyped 15 microsatellite loci in 225 samples collected during 20152016 from 8 sites, and contrasted the observed empirical genetic patterns against predictions from each model. We found low but significant levels of population structure among sites. Only the seascape approach was able to significantly explain levels of genetic structure and diversity, but exclusively within spring and summer, suggesting that this period represents the spawning season for L. peru. We showed that in the GC, the strong asymmetry in the oceanic currents causes larval connectivity to show different values when measured in distinct directions (anisotropy). Management tools, including marine reserves, could be more effective if placed upstream of the predominant flow. Managers should consider that oceanographic distances describing the direction and intensity of currents during the spawning period are significant predictors of larval connectivity between sites, as opposed to geographic distances.
    Note
    12 month embargo; published online: 22 November 2017
    ISSN
    0025-3162
    1432-1793
    DOI
    10.1007/s00227-017-3267-x
    Version
    Final accepted manuscript
    Sponsors
    CONACYT fellowship [250126]; Walton Family Foundation [2011-1235]; David and Lucile Packard Foundation [2013-39359, 2013-39400, 2015-62798]; Fondo Institucional CONACYT-Fronteras de la Ciencia [26/2016]
    Additional Links
    http://link.springer.com/10.1007/s00227-017-3267-x
    ae974a485f413a2113503eed53cd6c53
    10.1007/s00227-017-3267-x
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    UA Faculty Publications

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