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Free Content A Study of the Hatching Process in Aquatic Invertebrates, XXII. Multiple Membrane Shedding in Mysidium Columbiae (Zimmer) (Crustacea: Mysidacea)

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Hatching of Mysidium columbiae was studied at Port Royal, Jamaica. Eggs in the brood pouch of the mother lose two egg membranes. Loss of the second egg membrane results in formation of a nauplius, with three pairs of free appendages. Continued development results in larvae that bear free thoracic legs, as in the adult, but are incapable of extensive movements, and in which the eyes point dorsally instead of laterally. Ecdysis is associated with liberation of the young mysids from the brood pouch. It is estimated that from 48 to 72 hours pass between oviposition and shedding of the second egg membrane, 48 hours between appearance of the free nauplius and shedding of the naupliar membrane, and another 48 hours between shedding of the naupliar membrane and emergence from the brood pouch. The stages in development are figured and described.

Document Type: Research Article

Publication date: March 1, 1966

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  • The Bulletin of Marine Science is dedicated to the dissemination of high quality research from the world's oceans. All aspects of marine science are treated by the Bulletin of Marine Science, including papers in marine biology, biological oceanography, fisheries, marine affairs, applied marine physics, marine geology and geophysics, marine and atmospheric chemistry, and meteorology and physical oceanography.
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