Journal or Publishing Institution: The Journal of Toxicological Sciences
Study: https://www.jstage.jst.go.jp/article/jts/39/2/39_211/_article/-char/ja/
Author(s): Mottier, A., Pini, J. and Costil, K.
Article Type: Peer Reviewed Study
Record ID: 1685
Abstract: Surfactants used in herbicide formulations are generally considered inert with no toxic effects on animals. Polyethoxylated tallow amines (POEAs) are non-ionic surfactants used in many herbicide formulations to promote the penetration of the active matter into plant cuticles. The present study aimed to assess the toxicity of a POEA surfactant system, the Genamin T-200®, on two larval stages of the Pacific oyster, Crassostrea gigas. The embryotoxicity of Genamin T-200® was quantified after 36 hr of exposure, considering both arrested development and abnormalities in D-shaped larvae. The ability of pediveliger larvae to metamorphose was studied after 24 hr exposure to Genamin T-200®. According to the European toxicity classification, the present results suggest that Genamin T-200® could be considered very toxic to embryo larval development, with an EC50 of 262 µg/l, and toxic to metamorphosis processes with an EC50 of 3,027 µg/l. The high toxicity of glyphosate-based formulations compared to the active ingredient and its by-product appears to be due primarily to surfactants.
Keywords: Nonionic Surfactants, Pacific Oysters, Development Biology, Herbicides, Ethoxylation, Tallow, Amines; Crassostrea gigas, Embryotoxicity, Metamorphosis, POEA, Surfactant; Animals, Crassostrea, Drug Dose-Response Relationship, Embryonic Development, Larva, Biological Metamorphosis, Surface-Active Agents, Time Factors
Citation: Mottier, A., Pini, J. and Costil, K., 2014. Effects of a POEA surfactant system (Genamin T-200®) on two life stages of the Pacific oyster, Crassostrea gigas. The Journal of Toxicological Sciences, 39(2), pp.211-215.
