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Histological Comparison of Asteroid Neurosecretory Granules before, during, and after Natural Spawning

David G. Atwood
Transactions of the American Microscopical Society
Vol. 92, No. 2 (Apr., 1973), pp. 277-280
Published by: Wiley on behalf of American Microscopical Society
DOI: 10.2307/3224925
Stable URL: http://www.jstor.org/stable/3224925
Page Count: 4
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Histological Comparison of Asteroid Neurosecretory Granules before, during, and after Natural Spawning
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Abstract

Neurosecretory granules within the motor and sensory regions of the radial nerve complex of Echinaster echinophorus and Patiria miniata were histologically compared before, during, and after natural spawning. Granules (0.5 µ) within the sensory regions of spawning and post spawning animals appeared to decrease in quantity, whereas granules of motor regions increased in size and concentration. No migration of granules either toward the cuticle or the coelom was noted during or after spawning. There was no quantitative difference in granules between nerves fixed during spawning, 1-5 hr, or 1½ days after natural spawning had ceased.

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