Early life stage toxicity of extracts from the African fish poison plants Tephrosia vogelii Hook. f. and Asystasia vogeliana Benth. on zebrafish embryos |
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| Authors: | A. P. Ekanem&dagger ,T. Meinelt&Dagger ,W. Kloas&Dagger § , K. Knopf&Dagger |
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| Affiliation: | Institute of Oceanography, University of Calabar, P.M.B. 1115, Calabar, Nigeria,; Department of Inland Fisheries, Leibniz‐Institute of Freshwater Ecology and Inland Fisheries, Müggelseedamm 310, 12587 Berlin, Germany and; Department of Endocrinolgy, Institute for Biology, Humboldt‐University Berlin, 10115 Berlin, Germany |
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| Abstract: | Embryos of Danio rerio are highly susceptible to extracts of the plants Tephrosia vogelii and Asystasia vogeliana . The concentration of the dried extracts at which 50% of the embryos were affected (EC50) after 24 h exposure were 320 and 572 μg l−1, respectively; corresponding 50% mortality (LC50) values after 48 h exposure were 493 and 869 μg l−1. Results indicate that the use of these ichthyotoxic plants might have a severe impact on the survival of fish larvae in the field. |
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| Keywords: | Asystasia vogeliana fish poison plants Tephrosia vogelii toxicity zebrafish |
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