This just in to me from the Credit valley Conservation Authority.
[quote]Lampricide Treatment on the Credit River
Public notice from Fisheries and Oceans Canada (DFO) regarding lampricide in the Credit River. The revised treatment section will be from Norval to Port Credit. The river will be a yellowy-green during treatment.
Fisheries and Oceans Canada (DFO) is planning to treat approximately 61 km of the Credit River between Cheltenham and Lake Ontario with the lampricide TFM (3-Trifluoromethyl-4-nitrophenol) to reduce the resident larval Sea lamprey population. Lampricide will be applied for approximately 14 hours from a point on the river near the municipality of Norval, but will take several days to reach Lake Ontario.
Timing of the treatment is dependent upon streamflow and weather conditions, and is tentatively scheduled for the period between June 19-23, 2014.
Lampricide selectively kills Sea Lamprey larvae, but may also result in the death of other fish that are weakened by disease, spawning or other environmental factors. Although lampricide is not harmful to humans or other animals at the concentrations used during treatment, any use of stream water for irrigation and drinking should be suspended for a 24-hour period during the treatment.
The Sea lamprey is an invasive species in the Great Lakes. Since the 1950’s, DFO’s Sea Lamprey Control Centre has worked under an international agreement with the Great Lakes Fishery Commission towards the delivery of effective Sea lamprey control in the Great Lakes.
2011 Photos
https://www.flickr.com/photos/91080279@N05/sets/72157644829329299/
For more information contact:
Sea Lamprey Control Centre
Fisheries and Oceans Canada
1219 Queen St. East, Sault Ste. Marie, ON P6A 2E5
T. 800-553-9091 | Fax. 705-941-3025
Consult the Fisheries and Oceans Canada website at:
www.dfo-mpo.gc.ca/species-especes/lamprey-lamproie-eng.htm[/quote]
Jeff
It is not the first time and I remember many years ago paddling down the river and have the colour change. When it mixes with the air is when you get the wield colours.