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Hatching and Naupliar Development in Cyclops Vernalis (Crustacea: Copepoda) in Relation to Available Dissolved Oxygen

Please use this identifier to cite or link to this item: http://hdl.handle.net/1811/22879

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Title: Hatching and Naupliar Development in Cyclops Vernalis (Crustacea: Copepoda) in Relation to Available Dissolved Oxygen
Creators: Helm, James G.; Hubschman, Jerry H.
Issue Date: 1982-12
Citation: The Ohio Journal of Science. v82, n5 (December, 1982), 225-229
Abstract: The eggs of Cyclops vernalis were gassed with varying quantities of oxygen and nitrogen, then allowed to hatch and the larvae to develop. A critical threshold of available dissolved oxygen was observed at 1.34 mg O2/l; below this level, hatching dropped to 15%. At 0.38 mg/l hatching did not occur. A similar threshold of survivorship (23%) was observed at 1.34 mg O2/l. Below this level, no organisms reached the first copepodid stage. Survival above 70% required 2.67 mg O2/l dissolved oxygen. Most naupliar mortality occurred at the initiation of ecdysis reflecting the stress imposed by oxygen crisis. A detailed description of the gassing procedure and apparatus is provided.
URI: http://hdl.handle.net/1811/22879
ISSN: 0030-0950
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