The ‘River of Death’ continues to earn its title…
The California Department of Fish and Wildlife’s (CDFW) use of the explanation of ‘gas bubble disease’ to cover the death of the 850,000 fall-run Chinook salmon fry seems questionable in the face the known conditions at Iron Gate Dam (days during & following release from Fall Creek) and the published science, which in summary suggests:
1. A pressure gradient is required; means the water behind the dam…
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2 Comments
The DFW says they tested for O2 and turbidity. How about heavy metals. Here is a paper on the effect of chromium on freshwater fish. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5977408/
thanks for the link: another rabbit hole of study.. I found this interesting “After 96 h of exposure, fingerlings have been found to face the problem of imbalance in all the test concentrations. Mucus secretion rate has been found to increase in all concentrations after 96 h of exposure [14].
then in the table 1: fry was 7.6 mg/l which is much higher than the river is showing but lower doses longer periods of time could equate?