Date of Award

Summer 1983

Document Type


Degree Name

Master of Science (MS)


Ocean & Earth Sciences



Committee Director

John R. McConaugha

Committee Member

Anthony J. Provenzano, Jr.

Committee Member

David L. Feigenbaum

Call Number for Print

Special Collections LD4331.O35B87


The caridean shrimp Hippolysmata wurdemanni Gibbes was studied from a histological and a behavioral basis and was found to be a protandric hermaphrodite which later adopts simultaneous functional hermaphroditism. When the animal reaches a certain size, the androgenic gland degenerates, the male secondary sexual characteristics are lost, and vitellogenesis occurs in the anterior portion of the gonad. The animals do not lose the ability to function as males as evidenced by the presence of mature sperm in the gonad and the gonadal lumen of gravid shrimp, and the ability of both members of an isolated pair of shrimp to repeatedly spawn fertile eggs , even after several molts.


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