Fish Poisoning

[Jim Roper]

A further issue:- CEFAS thought they found a couple of Prussian Carp among the dead fish, seems there have been other reports of this invasive species that appears to have very dominant genes that take over from whatever others they hybridize with. The EA are trying to find out where they are coming from. I have never bought any Crucians at all.

[chesters1]

Suppliers seem to be very lax in what they supply and the EA appear not to care going by experience

[Jim Roper]

EA initial test results suggest Golden Algae is to blame, Prymnesium Parvum, very rare but often the cause of deaths in lakes close to the sea.

"We have now received preliminary results from our water quality and algae samples that were taken from the fishery last week. The water quality and chemistry results show nothing out of the ordinary or anything that would suggest that there has been any polluting matter introduced to the lake that could result in a fish mortality.

Analysis of the algal sample found a high algal abundance with some spiky form diatoms present and also golden algae and dinophytes. The latter two have been associated with unexplained fish kills in very low abundance. That coupled with an overall high algal abundance will most likely be causing dissolved oxygen fluctuations which can also result in fish kills occurring.

Our visual checks of the fish also suggest that the most likely cause of the mortality was the algae present in the lake at the time. As we receive final confirmation of all results we will let you know.

Kind regards,"

[chesters1]

Churchill's been vindicated then? Damned nature!

[Jim Roper]

42 minutes ago, chesters1 said:

Churchill's been vindicated then? Damned nature!

As far as I can see, the tests so far are on the water samples. Waiting for test results on the dying fish! They have to be tested while alive. The dead duck was burned, so no post mortem possible.

People who saw the dead fish are sceptical about the initial EA findings.

Not sure if there are likely to be survivors yet.

The lock that was glued up was definitely down to a Churchill operative!

[Jim Roper]

This Golden Algae is sometimes found in estuaries where there is salt water or closed lakes very close to the sea, so it seems.

I wonder if it could be spread by sea birds like Cormorants!!!!!!!!!

I doubt anyone would admit it!!!!!!!!

Edited April 20, 2023 by Jim Roper

[Ken L]

You might want to start purging a few posts that lay the blame at the feet of a person or company - here and elsewhere.

If you get my drift.

[chesters1]

[Jim Roper]

All sorts of reading being done on this. Dangerously high oxygen levels can be the result of too much Hydrogen Peroxide, it seems. When D-DAS tested, the oxygen level in Lavender was a lot higher than the other lakes.

[Jim Roper]

On 4/20/2023 at 9:30 PM, Ken L said:

You might want to start purging a few posts that lay the blame at the feet of a person or company - here and elsewhere.

If you get my drift.

You haven't seen all the evidence! Only a few people have.