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    What Happened to Nemo: Population Dynamics of the Orange Clownfish, Amphiprion percula Over an Eight-Year Time Gap on Kimbe Island, Papua New Guinea

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    Name:
    MS Thesis_Lucy Fitzgerald_Spring 2020.pdf
    Size:
    1.921Mb
    Format:
    PDF
    Description:
    MS Thesis
    Embargo End Date:
    2021-05-06
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    Type
    Thesis
    Authors
    Fitzgerald, Lucy cc
    Advisors
    Berumen, Michael L. cc
    Committee members
    Benzoni, Francesca
    Coker, Darren
    Harrison, Hugo
    Program
    Marine Science
    KAUST Department
    Biological and Environmental Sciences and Engineering (BESE) Division
    Date
    2020-04
    Embargo End Date
    2021-05-06
    Permanent link to this record
    http://hdl.handle.net/10754/662763
    
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    Show full item record
    Access Restrictions
    At the time of archiving, the student author of this thesis opted to temporarily restrict access to it. The full text of this thesis will become available to the public after the expiration of the embargo on 2021-05-06.
    Abstract
    Long-term studies are important for understanding the intricacies of population dynamics over time. Self-recruitment and social hierarchy are valuable tools to quantify the rates at which populations change. In mutualistic symbiosis, where two species benefit from the relationship, different selective pressures and life histories can have unintended consequences on the population dynamics of both species. Anemonefish live in a sized-based hierarchy where individuals queue to be part of the breeding pair (ranks 1 and 2). They have a mutualistic association with their host anemone; the identity of the anemone can impact their growth and fecundity. However, there is limited knowledge on the anemone lifespan and its site persistence over time. Here, we investigate rank changes and self-recruitment in Amphiprion percula and persistence in a common host anemone, Stichodactyla gigantea, on the remote island of Kimbe Island in Papua New Guinea. The populations of A. percula (n = 1,530) and their local host anemones, S. gigantea (n = 290) and Heteractis magnifica (n = 174), were sampled exhaustively in 2011 and 2019. Using DNA profiling, I determined the fate of individuals between years. We found that 21% of the A. percula population survived over the eight-year time gap compared to the 69% survival of the associated S. gigantea population in a six-year time gap. Half of the surviving A. percula individuals increased in rank and exhibited faster growth rates living on S. gigantea compared to H. magnifica. Self-recruitment was high in both years, 47% in 2011 and 39% in 2019, with one individual returning to its natal anemone. Our findings provide rare insights into one of the most charismatic symbiotic relationships in the marine environment such as the first documentation of longevity in a host anemone.
    Citation
    Fitzgerald, L. (2020). What Happened to Nemo: Population Dynamics of the Orange Clownfish, Amphiprion percula Over an Eight-Year Time Gap on Kimbe Island, Papua New Guinea. KAUST Research Repository. https://doi.org/10.25781/KAUST-E9F9O
    DOI
    10.25781/KAUST-E9F9O
    ae974a485f413a2113503eed53cd6c53
    10.25781/KAUST-E9F9O
    Scopus Count
    Collections
    Biological and Environmental Sciences and Engineering (BESE) Division; Marine Science Program; Theses

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