Early life stage toxicity of extracts from the African fish poison plants Tephrosia vogelii Hook. f. and Asystasia vogeliana Benth. on zebrafish embryos
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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fish poison plants;
Document Type: Regular Paper
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
Publication date: 2004-08-01