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Hatching and viability of copepod eggs at two stages of embryological development: anoxic/hypoxic effect

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Abstract

The effects of low oxygen concentrations on the hatching and viability of copepod eggs at two stages of embryological development were investigated. Fully developed eggs from Acartia tonsa (Dana) and Labidocera aestiva (Wheeler) collected between July and September 1991 at Turkey Point, Florida, USA, hatched at lower oxygen concentrations than newly spawned eggs given the same incubation periods. Since many of the newly spawned eggs subsequently hatched when exposed to normoxic conditions, it is likely that the exposure to low oxygen delayed embryonic development. At oxygen concentrations where no initial hatching occurred, the subsequent hatching success of fully developed eggs of A. tonsa was higher than that of newly spawned eggs, indicating that newly spawned eggs were more sensitive to low oxygen concentrations. No such difference was observed for the eggs of L. aestiva.

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Communicated by J. P. Grassle, New Brunswick

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Lutz, R.V., Marcus, N.H. & Chanton, J.P. Hatching and viability of copepod eggs at two stages of embryological development: anoxic/hypoxic effect. Marine Biology 119, 199–204 (1994). https://doi.org/10.1007/BF00349557

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  • DOI: https://doi.org/10.1007/BF00349557

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