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Marine Biology

, Volume 161, Issue 9, pp 2167–2178 | Cite as

Hitchhikers reveal cryptic host behavior: new insights from the association between Planes major and sea turtles in the Pacific Ocean

  • Joseph B. Pfaller
  • Joanna Alfaro-Shigueto
  • George H. Balazs
  • Takashi Ishihara
  • Kerry Kopitsky
  • Jeffrey C. Mangel
  • S. Hoyt Peckham
  • Alan B. Bolten
  • Karen A. Bjorndal
Original Paper

Abstract

Studies that incorporate information from habitat-specific ecological interactions (e.g., epibiotic associations) can reveal valuable insights into the cryptic habitat-use patterns and behavior of marine vertebrates. Sea turtles, like other large, highly mobile marine vertebrates, are inherently difficult to study, and such information can inform the implementation of conservation measures. The presence of epipelagic epibionts, such as the flotsam crab Planes major, on sea turtles strongly suggests that neritic turtles have recently occupied epipelagic habitats (upper 200 m in areas with >200 m depth) and that epipelagic turtles spend time at or near the surface. We quantified the effects of turtle species, turtle size, and habitat (neritic or epipelagic) on the frequency of epibiosis (F 0) by P. major on sea turtles in the Pacific Ocean. In neritic habitats, we found that loggerhead (F 0 = 27.6 %) and olive ridley turtles (F 0 = 26.2 %) host crabs frequently across a wide range of body sizes, and green turtles almost never host crabs (F 0 = 0.7 %). These results suggest that loggerheads and olive ridleys display variable/flexible epipelagic-neritic transitions, while green turtles tend to transition unidirectionally at small body sizes. In epipelagic habitats, we found that loggerheads host crabs (F 0 = 92.9 %) more frequently than olive ridleys (F 0 = 50 %) and green turtles (F 0 = 38.5 %). These results suggest that epipelagic loggerheads tend to spend more time at or near the surface than epipelagic olive ridleys and green turtles. Results of this study reveal new insights into habitat-use patterns and behavior of sea turtles and display how epibiont data can supplement data from more advanced technologies to gain a better understanding of the ecology of marine vertebrates during cryptic life stages.

Keywords

Peru Green Turtle Loggerhead Turtle Turtle Species Baja California Peninsula 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgments

We thank all organizations and people that either supported or participated in crab collections in Japan (Sea Turtle Association of Japan, H Fukuie, S Watanabe, K Kawano, K Saito, M Hara, S Yamashita, K Hashimoto, K Ebisui, and Y Yasuoka), Hawaii (USGS National Wildlife Health Center, Honolulu Field Station, T Work), Samoa, Baja California Sur, México (David & Lucille Packard Foundation, US Fish & Wildlife Service, ProPeninsula, The Ocean Foundation, Equipo ProCaguama, Grupo Tortuguero V de la Toba, J Lucero, JM Rodríguez Barón), Mexico and Central America in 2003 (NMFS Southwest Fisheries Science Center and NOAA, and all scientific and support personnel working on cruises), and Peru (Darwin Sustainable Artisanal Fisheries Initiative—Peru). We also thank J Ferguson (University of Florida, Department of Biology) for statistical advice, and J Houghton and two anonymous reviewers for their valuable scientific and editorial comments.

Supplementary material

227_2014_2498_MOESM1_ESM.docx (78 kb)
Supplementary material 1 (DOCX 77 kb)

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Copyright information

© Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  • Joseph B. Pfaller
    • 1
    • 2
  • Joanna Alfaro-Shigueto
    • 3
    • 4
  • George H. Balazs
    • 5
  • Takashi Ishihara
    • 6
    • 7
  • Kerry Kopitsky
    • 8
  • Jeffrey C. Mangel
    • 3
    • 4
  • S. Hoyt Peckham
    • 9
  • Alan B. Bolten
    • 1
  • Karen A. Bjorndal
    • 1
  1. 1.Archie Carr Center for Sea Turtle Research, Department of BiologyUniversity of FloridaGainesvilleUSA
  2. 2.Caretta Research ProjectSavannahUSA
  3. 3.ProDelphinusLima 18Peru
  4. 4.Centre for Ecology and ConservationUniversity of ExeterPenrynUK
  5. 5.Marine Turtle Research Program, National Ocean and Atmospheric Administration, National Marine Fisheries ServicePacific Islands Fisheries Science CenterHonoluluUSA
  6. 6.Sea Turtle Association of JapanOsakaJapan
  7. 7.Suma Aqualife ParkHyogoJapan
  8. 8.Rising Tides RestorationDoverUSA
  9. 9.Center for Ocean SolutionsStanford UniversityPacific GroveUSA

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