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    Coral reef fish populations can persist without immigration

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    Type
    Article
    Authors
    Salles, Océane C.
    Maynard, Jeffrey A.
    Joannides, Marc
    Barbu, Corentin M.
    Saenz-Agudelo, Pablo
    Almany, Glenn R. cc
    Berumen, Michael L. cc
    Thorrold, Simon R. cc
    Jones, Geoffrey P.
    Planes, Serge
    KAUST Department
    Biological and Environmental Sciences and Engineering (BESE) Division
    Marine Science Program
    Red Sea Research Center (RSRC)
    Date
    2015-11-18
    Online Publication Date
    2015-11-18
    Print Publication Date
    2015-11-22
    Permanent link to this record
    http://hdl.handle.net/10754/595317
    
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    Abstract
    Determining the conditions under which populations may persist requires accurate estimates of demographic parameters, including immigration, local reproductive success, and mortality rates. In marine populations, empirical estimates of these parameters are rare, due at least in part to the pelagic dispersal stage common to most marine organisms. Here, we evaluate population persistence and turnover for a population of orange clownfish, Amphiprion percula, at Kimbe Island in Papua New Guinea. All fish in the population were sampled and genotyped on five occasions at 2-year intervals spanning eight years. The genetic data enabled estimates of reproductive success retained in the same population (reproductive success to self-recruitment), reproductive success exported to other subpopulations (reproductive success to local connectivity), and immigration and mortality rates of sub-adults and adults. Approximately 50% of the recruits were assigned to parents from the Kimbe Island population and this was stable through the sampling period. Stability in the proportion of local and immigrant settlers is likely due to: low annual mortality rates and stable egg production rates, and the short larval stages and sensory capacities of reef fish larvae. Biannual mortality rates ranged from 0.09 to 0.55 and varied significantly spatially. We used these data to parametrize a model that estimated the probability of the Kimbe Island population persisting in the absence of immigration. The Kimbe Island population was found to persist without significant immigration. Model results suggest the island population persists because the largest of the subpopulations are maintained due to having low mortality and high self-recruitment rates. Our results enable managers to appropriately target and scale actions to maximize persistence likelihood as disturbance frequencies increase.
    Citation
    Coral reef fish populations can persist without immigration 2015, 282 (1819):20151311 Proceedings of the Royal Society B: Biological Sciences
    Publisher
    The Royal Society
    Journal
    Proceedings of the Royal Society B: Biological Sciences
    DOI
    10.1098/rspb.2015.1311
    PubMed ID
    26582017
    Additional Links
    http://rspb.royalsocietypublishing.org/lookup/doi/10.1098/rspb.2015.1311
    ae974a485f413a2113503eed53cd6c53
    10.1098/rspb.2015.1311
    Scopus Count
    Collections
    Articles; Biological and Environmental Sciences and Engineering (BESE) Division; Red Sea Research Center (RSRC); Marine Science Program

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