Pujol Benoit

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  • Article
    Rank change and growth within social hierarchies of the orange clownfish, Amphiprion percula
    (Springer, 2022-10-05) Fitzgerald, Lucy M. ; Harrison, Hugo B. ; Coker, Darren J. ; Sáenz-Agudelo, Pablo ; Srinivasan, Maya ; Majoris, John E. ; Boström Einarsson, Lisa ; Pujol, Benoit ; Bennett-Smith, Morgan ; Thorrold, Simon R. ; Planes, Serge ; Jones, Geoffrey P. ; Berumen, Michale L.
    Social hierarchies within groups define the distribution of resources and provide benefits that support the collective group or favor dominant members. The progression of individuals through social hierarchies is a valuable characteristic for quantifying population dynamics. On coral reefs, some clownfish maintain size-based hierarchical communities where individuals queue through social ranks. The cost of waiting in a lower-ranked position is outweighed by the reduced risk of eviction and mortality. The orange clownfish,Amphiprion percula, maintains stable social groups with subordinate individuals queuing to be part of the dominant breeding pair. Strong association with their host anemone, complex social interactions, and relatively low predation rates make them ideal model organisms to assess changes in group dynamics through time in their natural environment. Here, we investigate the rank changes and isometric growth rates ofA. percula from 247 naturally occurring social groups in Kimbe Island, Papua New Guinea (5° 12′ 13.54″ S, 150° 22′ 32.69″ E). We used DNA profiling to assign and track individuals over eight years between 2011 and 2019. Over half of the individuals survived alongside two or three members of their original social group, with twelve breeding pairs persisting over the study period. Half of the surviving individuals increased in rank and experienced double the growth rate of those that maintained their rank. Examining rank change in a wild fish population provides new insights into the complex social hierarchies of reef fishes and their role in social evolution.
  • Preprint
    First genealogy for a wild marine fish population reveals multi-generational philopatry
    ( 2016-10) Salles, Océane C. ; Pujol, Benoit ; Maynard, Jeffrey A. ; Almany, Glenn R. ; Berumen, Michael L. ; Jones, Geoffrey P. ; Saenz-Agudelo, Pablo ; Srinivasan, Maya ; Thorrold, Simon R. ; Planes, Serge
    Natal philopatry — the return of individuals to their natal area for reproduction — has advantages and disadvantages for animal populations. Natal philopatry may generate local genetic adaptation but may also increase the probability of inbreeding that can compromise persistence. While natal philopatry is well documented in anadromous fishes, marine fish may also return to their birth site to spawn. How philopatry shapes wild fish populations is, however, unclear because it requires constructing multi-generational pedigrees that are currently lacking for marine fishes. Here we present the first multi-generational pedigree for a marine fish population by repeatedly genotyping all individuals in a population of the orange clownfish (Amphiprion percula) at Kimbe Island (Papua New Guinea) over a 10-year period. Based on 2927 individuals, our pedigree analysis revealed that longitudinal philopatry was recurrent over five generations. Progeny tended to settle close to their parents, with related individuals often sharing the same colony. However, successful inbreeding was rare and genetic diversity remained high, suggesting occasional inbreeding does not impair local population persistence. Local reproductive success was dependent on the habitat larvae settled into, rather than the habitat they came from. Our study suggests that longitudinal philopatry can influence both population replenishment and local adaptation of marine fishes. Resolving multi-generational pedigrees over a relatively short time period, as we present here, provides a framework for assessing the ability of marine populations to persist and adapt to accelerating climate change.