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The effects of low metal levels on a clonal hydroid
Stebbing, A.R.D. (1976). The effects of low metal levels on a clonal hydroid. J. Mar. Biol. Ass. U.K. 56(4): 977-994
In: Journal of the Marine Biological Association of the United Kingdom. Cambridge University Press/Marine Biological Association of the United Kingdom: Cambridge. ISSN 0025-3154, more
Peer reviewed article  

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Keywords
    Bioassays; Cadmium; Copper; Growth; Heavy metals; Mercury; Toxicity; Campanularia flexuosa (Alder, 1857) [WoRMS]; Marine

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  • Stebbing, A.R.D.

Abstract
    A sensitive and precise bioassay has been developed, using the colonial hydroid Campanularia flexuosa, for measuring the sublethal effects of marine contaminants in terms of the inhibition of colonial growth rate. A single clone can be cultured simply in the lab for indefinite periods. Thresholds of sensitivity to 3 metals in 11-day experiments were Hg2+ 1.6-1.7 {mu}/l, Cu2+ 10-13 {mu}g/l, Cd2+ 110-280 {mu}g/l. Observations on the development of the hydroid's response with time shows that sensitivity increases linearly at first, but during the 2nd week the metals have a transitory stimulatory effect on colonial growth rate which is known as the Arndt-Schulz Effect.

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