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Free Content Evaluation of Potential Indicators of Sub-Lethal Toxic Stress on Marine Zooplankton (Feeding, Fecundity, Respiration, and Excretion): Controlled Ecosystem Pollution Experiment

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Fecal pellet and egg production were used as indicators of the condition of small copepods exposed to low levels of copper and mercury in the laboratory. Natural copepod assemblages in three different locations were compared in their sub-lethal responses. Although effects could be demonstrated in the 1-10 μg/l range, many biological and chemical factors combined to make it pointless to specify toxicity levels more precisely, particularly where the aim is to extrapolate data to other situations for regulatory purposes. Species composition, season, temperature, and chemical complexing capacity of the water would all introduce variability. It is suggested that in this concentration range, the kind of metal present may be less important than the total amounts. Respiration and excretion rates of zooplankton were not found to be sensitive indicators of sub-lethal stress.

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Document Type: Research Article

Publication date: 1977-01-01

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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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