1988: Gwydir River (NSW). Catfish residues. Pesticide: Endosulfan “Polluter Pays, Myths and Legends” Abstract National Toxics Network Sampling of wild catfish in the Gwydir River NSW demonstrated a significant increase in endosulfan residues and its metabolites, endosulfan sulfate and isomers, in fish livers during summer (147.7 – 307.2 ug/kg) – Residues of Endosulfan in livers of wild catfish from a cotton growing area. Barbara Nowak (unplublished thesis) Uni.of Sydney 1988 http://ntn.org.au/wp/wp-content/uploads/2010/02/polluterpaysmythlegend.pdf