Journal
ARCHIVES OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY
Volume 64, Issue 4, Pages 692-700Publisher
SPRINGER
DOI: 10.1007/s00244-012-9871-3
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Funding
- University Cooperation in Development-Interuniversity Council of French Speaking Universities of Belgium
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Acute toxicities of Tihan 175 O-TEQ, as well as its active ingredients flubendiamide and spirotetramat, and of Thionex 350 EC (active compound endosulfan) were measured for embryo-larval and juvenile stages of the African catfish Clarias gariepinus to assess risks of pesticide use in the cotton basin in Benin (West Africa). For embryo-larval stages, Tihan was more toxic (LC50(48h) 20 ppm) than Thionex (LC50(48h) 56 ppm), and flubendiamide was more toxic (LC50(48h) 2.0 ppm) than spirotetramat (LC50(48h) 8.44 ppm). All decreased hatching rates. Tihan and spirotetramat disturbed larval swimming coordination; flubendiamide induced tail cleavage. For juvenile fish, Thionex was more toxic (LC50(96h) 0.22 ppm) than Tihan (LC50(96h) 8.8 ppm), and flubendiamide (LC50(96h) 4.7 ppm) was more toxic than spirotetramat (LC50(96h) 6.0 ppm). Eggs were more resistant than juvenile fish to all tested pesticides except flubendiamide. Although Thionex was more toxic to juvenile fish, replacing Thionex with Tihan may be undesirable for survival of eggs and larvae.
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