Early life stage toxicity of extracts from the African fish poison plants Tephrosia vogelii Hook. f. and Asystasia vogeliana Benth. on zebrafish embryos期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

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Early life stage toxicity of extracts from the African fish poison plants Tephrosia vogelii Hook. f. and Asystasia vogeliana Benth. on zebrafish embryos

Authors:	A P Ekanem† T Meinelt‡ W Kloas‡§ K Knopf‡

Institution:	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

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.

Keywords:	Asystasia vogeliana fish poison plants Tephrosia vogelii toxicity zebrafish