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Science 27 October 1972:
Vol. 178. no. 4059, pp. 423 - 424
DOI: 10.1126/science.178.4059.423
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Articles

Echinoid Spawning Induced by a Radial Nerve Factor

Roger C. Cochran 1 and Franz Engelmann 1

1 Department of Biology, University of California, Los Angeles 90024

An extract of radial nerves of the sea urchin. Strongylocentrotus purpuratus, induces spawning within 1 minute in this species as well as in other echinoids, but a delayed spawning in several asteroid species. The concentration of the spawn-inducing factor in the radial nerves fluctuates annually correlated with the reproductive season of this species along the coast of southern California.

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Science. ISSN 0036-8075 (print), 1095-9203 (online)