Echinoid Spawning Induced by a Radial Nerve Factor

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Science  27 Oct 1972:
Vol. 178, Issue 4059, pp. 423-424
DOI: 10.1126/science.178.4059.423


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.