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Marine Biology

, Volume 127, Issue 1, pp 171–178 | Cite as

Diving behavior of immature hawksbills (Eretmochelys imbricata) in a Caribbean cliff-wall habitat

  • R. P. van Dam
  • C. F. Diez
Article

Abstract

Time-depth recorders were attached to immature hawksbills (Eretmochelys imbricata Linnaeus, 1766) residing at the northwestern cliffs of Mona Island, Puerto Rico. Data on diving profiles obtained from four turtles of 32.0 to 53.4 cm straight carapace length revealed strong similarities in behavioral patterns. During daylight hours, turtles were active an average 8.4 h per day, surfacing 3.6% of the time. Length of foraging dives correlated with turtle size, with mean durations ranging from 8.6 to 14.0 min. Foraging dives, with a mean depth of 4.7 m, were associated with feeding on encrusting sponges. At night, turtles were mostly inactive, surfacing 1.8% of the time and with individual mean submergence intervals of between 30.4 and 37.1 min. From the surfacing behavior of turtles making deep and long dives, it is inferred that dives were aerobic, with the turtles making use of oxygen stores in addition to that of the lung.

Keywords

Oxygen Sponge Behavioral Pattern Strong Similarity Carapace Length 
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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Copyright information

© Springer-Verlag 1996

Authors and Affiliations

  • R. P. van Dam
    • 1
  • C. F. Diez
    • 2
  1. 1.Institute for Systematics and Population BiologyUniversity of AmsterdamAmsterdam
  2. 2.Department of Biological SciencesUniversity of Central FloridaOrlandoUSA

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