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Biol Bull 156: 62-75. (February 1979)
© 1979 Marine Biological Laboratory
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REPRODUCTION AND DEVELOPMENT OF HALICHONDRIA SP. IN THE MYSTIC ESTUARY, CONNECTICUT

PAUL E. FELL 1 and WILLIAM F. JACOB 1

1 Department of Zoology, Connecticut College, New London, Connecticut 06320

1. A description of gametogenesis and embryonic development in Halichondria sp. is presented.

2. Halichondria sp. exhibits an incomplete gonochorism in which some specimens produce either eggs or sperm and others produce both. When the sexes are separate, the sex ratio is about 1 : 1:

3. In the Mystic Estuary, Connecticut, the reproductive period of postdormant specimens extends from May into July, while the reproductive period of postlarval specimens begins in July and continues at least into October. Since the reproductive periods of postdormant and postlarval specimens are separated, it appears that reproduction is, to a large extent, under endogenous control.






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Copyright © 1979 by the Marine Biological Laboratory.