Posted by Kathy White at Facebook
“The Department of Conservation has been giving Pirongia landowners a flier that says “1080 does not kill or harm fish.” This is completely misleading and dangerous for those who eat fish, eels, shellfish and koura. See for yourself what scientists have said in an independent summary of research into 1080 and fish. Quotes: “There are indications of sub-lethal effects on fish among the very limited studies that have been done:“significantly greater weight loss occurred in eels exposed to 1080 compared to those that were not”…”the sub-lethal concentrations of 1080 in the water may have been sufficient to inhibit eel metabolism”…”sub-lethal 1080 exposure presented to eels through ingestion of contaminated possum may have been sufficient to temporarily inhibit eel metabolism” (Lyver et al., 2005)
“96-hour [exposure of Rainbow trout, half of individuals dead at] 54 mg/l, sub-lethal effects on survivors – not specified” (ERMA Agency, Appendix C)”Fish & Game ranger Lawson Davey said the national safety limit of 1080 in any food was 0.001 milligrams per kilogram, but the Cawthron Institute’s October toxicology results of 22 trout fed the poison showed muscle tissue with 1080 levels up to 4.7mg per kg.
Preliminary results of a DoC-commissioned study by the Cawthron Research Institute has shown the flesh of trout that ate mice containing the toxin would have levels of 1080 that exceeded New Zealand Food Safety Authority limits.
The maximum concentrations measured in trout tissue (up to 4.7 mg/kg) were observed at 24 h and 48 h after ingestion. The concentration decreased to close to 2 mg/kg after 84 h. An increase in 1080 concentration in the flesh was observed after 120 h, but the number of replicates at this interval was low (n = 2). Cawthron Institute: 1080 UPTAKE AND ELIMINATION IN RAINBOW TROUT
For more information, click on the link below.
Is 1080 Harmless to Fish? | 1080 Science
The Parliamentary Commissioner for the Environment’s report on 1080 poison (Wright, 2011) claimed that effects of 1080 on populations of eels, koura and bullies had been studied (by Suren & Lambert, 2006) and that no effect on any of the fish was found.