Unusual synchronization of Red Sea fish energy expenditures

Authors

  • Lewi Stone,

    Corresponding author
    1. Biomathematics Unit, Tel Aviv University, Ramat Aviv 69978, Israel
    2. Department of Zoology, Tel Aviv University, Ramat Aviv 69978, Israel
      *Correspondence: E-mail: lewi@lanina.tau.ac.il
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  • DaiHai He,

    1. Biomathematics Unit, Tel Aviv University, Ramat Aviv 69978, Israel
    2. Department of Zoology, Tel Aviv University, Ramat Aviv 69978, Israel
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  • K. Becker,

    1. University of Honeheim, Institute for Animal Production in the Tropics and Subtropics (480), Department of Aquaculture Systems and Animal Nutrition, D-70599 Stuttgart, Germany
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  • Lev Fishelson

    1. Department of Zoology, Tel Aviv University, Ramat Aviv 69978, Israel
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*Correspondence: E-mail: lewi@lanina.tau.ac.il

Abstract

The highly gregarious goat fish Parupeneus forskalii found in the Red Sea at Eilat, Israel exhibit highly synchronous swimming and feeding activity. Five fish were studied under controlled conditions and highly resolved time-series of their energy expenditures were measured. All fish demonstrated strong phase synchronization in that their activity levels, although erratic in time and intensity, were collectively coordinated and peaked simultaneously together. The synchronization of these wildly varying, and possibly chaotic signals of energy expenditures, were quantified using phase analysis. We suggest that, ecologically, this collective synchronization is a strategy that increases food-catch.

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