Marine Biology

, Volume 39, Issue 1, pp 25–30 | Cite as

Movement and feeding activity of red sea urchins (Strongylocentrotus franciscanus) adjacent to a kelp forest

  • J. E. Mattison
  • J. D. Trent
  • A. L. Shanks
  • T. B. Akin
  • J. S. Pearse


Movement and feeding were studied in a population of red sea urchins, Strongylocentrotus franciscanus (Agassiz, 1863), found within and immediately seaward of a kelp forest offshore from Santa Cruz, California, USA. Mean sea urchin movements varied from 7.5 cm/day inside the kelp forest to over 50 cm/day at 15 and 100 m outside the kelp forest. The percentage of sea urchins feeding decreased from 66% inside the kelp forest to 16 and 15% at 15 and 100 m outside the kelp forest. These data indicate that movement by these sea urchins is a response to a low food supply.


Food Supply Kelp Forest Strongylocentrotus Franciscanus Urchin Movement 
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Copyright information

© Springer-Verlag 1977

Authors and Affiliations

  • J. E. Mattison
    • 1
    • 2
  • J. D. Trent
    • 1
  • A. L. Shanks
    • 1
  • T. B. Akin
    • 1
  • J. S. Pearse
    • 1
  1. 1.Coastal Marine StudiesUniversity of CaliforniaSanta CruzUSA
  2. 2.SalinasUSA

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