Developmental Abnormalities Related to Bicarbonate Ion Status during Emergence of Artemia
Emergence of the Artemia prenauplius from its survival cyst after rehydration and the cessation of dormancy is far from being a simple process of passive rupture and it requires metabolic and osmotic activity. An energy requiring mechanism is essential in the events leading up to successful emergence and inhibitors of oxidative metabolism can lead to unsuccessful emergence. Emergence evidently depends on a complete and relatively rapid rupture of all membranes and components of the cyst wall external to the hatching membrane. Partial failure of this sequence is, in effect, total failure of successful emergence. We describe below how further exploitation of this biological assay system, namely incomplete emergence, points to bicarbonate ion as being an essential component in generation of the osmotic potential that energises emergence.
KeywordsZinc Permeability Cadmium Adenosine Chlorine
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