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Sea Urchin Recruitment: Effect of Substrate Selection on Juvenile Distribution

Cameron, R. A. and Schroeter, S. C. (1980) Sea Urchin Recruitment: Effect of Substrate Selection on Juvenile Distribution. Marine Ecology - Progress Series, 2 (3). pp. 243-247. ISSN 0171-8630. http://resolver.caltech.edu/CaltechAUTHORS:20121025-161631820

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Abstract

Intertidal field observations have shown that juvenile purple sea urchins Strongylocentwtus purpuratus are found in higher densities near adults . The same is true for subtidal populations of juvenile red sea urchins 5. franciscanus. These distribution patterns could be influenced by any of three elements: substrate selection, early juvenile mortality or juvenile migration. Using laboratory-reared larvae, we conducted experiments designed to gauge the effect of substrate selection on juvenile distributions of these two sea urchin species. In both laboratory and field experiments, larval sea urchins showed no enhanced settlement in the presence of adults or adult-associated substrates. These results imply that early juvenile mortality or migration provide the greater influence on juvenile distributions.


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Additional Information:© 1980 Inter-Research. This paper was presented by Professor J. S. Pearse; it was accepted for printing on December 11, 1979. We would like to thank Dr. Henry Offen, Director, Marine Science Institute, University of California, Santa Barbara and Dr. William Doyle, Director, Center for Coastal Marine Studies, University of California, Santa Cruz, for generously providing facilities in support of this effort. Dr. E. L. Triplett. University of California, Santa Barbara, kindly provided coldroom space and supplies. Jerry Wellington and Peter Steinberg helped with the diving. We are also indebted to Drs John Pearse and Mia Tegner for thoughtful criticism of the manuscript.
Record Number:CaltechAUTHORS:20121025-161631820
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Deposited By: Aucoeur Ngo
Deposited On:26 Oct 2012 14:49
Last Modified:27 Dec 2012 02:55

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