Marine Biology

, Volume 24, Issue 2, pp 97–107 | Cite as

The nesting of the Pacific ridley turtle Lepidochelys olivacea on Playa Nancite, Costa Rica

  • D. A. Hughes
  • J. D. Richard


A study of the nesting of the Pacific ridley turtle Lepidochelys olivacea was undertaken in Costa Rica on Playa Nancite — one of two beaches on which the authors had, the previous year, discovered large nesting aggregations of this species. During the 3 1/2-month period of this study, approximately 288,000 turtles nested on the 1300 m-long beach. About 99% of these nested during 3 periods of mass-nesting (arribadas). The predictability of the arribadas was investigated by observing and recording environmental parameters with which they may be correlated. The mass-nesting phenomenon, aspects of nesting behavior, and the adaptive advantages of mass-nesting are discussed. During the period of study, nearly 2,000 turtles were tagged, 102 of which were subsequently recovered. Carapace lengths and widths of 251 tagged turtles were measured. The emergence of hatchlings was recorded daily and, from these data, the incubation period and an indication of egg and hatchling survival was obtained. The activities of the various predators on eggs, hatchlings, and adults are described.


Beach Incubation Period Environmental Parameter Carapace Length Adaptive Advantage 
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.


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Literature Cited

  1. Caldwell, D. K.: A nesting report on the American ridley. Int., Turtle Tort. Soc. J. 1, 10–13 (1966).Google Scholar
  2. — and R. S. Casebeer: A note on the nesting of the East Pacific ridley sea turtle, Lepidochelys olivacea. Herpetologica 20, p. 213 (1964).Google Scholar
  3. Carr, A. F.: Handbook of turtles, 542 pp. Ithaca, New York: Comstock Publ. Ass. 1952.Google Scholar
  4. —: The riddle of the ridley. Anim. Kingd. 58, 148–156 (1955).Google Scholar
  5. —: The windward road, 258 pp. New York: Alfred Knopf 1956.Google Scholar
  6. —: Panspecific reproductive convergence in Lepidochelys kempi. Ergebn. Biol. 26, 297–303 (1963).Google Scholar
  7. —: So excellent a fish, 248 pp. New York: Natural History Press 1967.Google Scholar
  8. —: Great reptiles, great engimas. Audubon Mag. 74, 24–34 (1972).Google Scholar
  9. — and D. K. Caldwell: The problem of the Atlantic ridley turtle (Lepidochelys kempi) in 1958. Revta Biol. trop. 6 245–262 (1958).Google Scholar
  10. Hildebrand, H.: Hallazgo del area de anidacion de la tortuga marina “lora”, Lepicochelys kempi (Garman), en la costa occidental del golfo de Mexico. Ciencia, Méx. 22, 101–104 (1963).Google Scholar
  11. Pritchard, P. C. H.: Sea turtles of the Guianas. Bull. Fla St.Google Scholar
  12. —: The survival status of ridley sea-turtles in American waters. Biol. Conserv. 2, 13–17 (1969b).Google Scholar
  13. Richard, J. D. and D. A. Hughes: Some observations of sea turtle nesting activity in Costa Rica. Marine Biology 16, 297–309 (1972).Google Scholar
  14. Schultz, J. P.: Zeeschildpaddem, deel II Zeeschildpadden in Suriname. Dienst Landsbosbeheer Suriname. Paramaribo 1–44 (1964).Google Scholar
  15. Werler, J.: Miscellaneous notes on the eggs and young of Texan and Mexican reptiles. Zoologica, N.Y. 36 (3), 37–48 (1951).Google Scholar

Copyright information

© Springer-Verlag 1974

Authors and Affiliations

  • D. A. Hughes
    • 1
  • J. D. Richard
    • 1
  1. 1.Rosenstiel School of Marine and Atmospheric ScienceUniversity of MiamiMiamiUSA

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