Coarse Lakes Update November 2019
The club’s coarse lake’s sub group met on 14th November. We heard updates on the work at Petersfinger, Steeple Langford and the smaller lakes.
Petersfinger; Things have not settled with time, fish are continuing to die. Plants have been added and will be developing and helping things but water quality monitoring and fish health checks have shown that we still have problems. The lake bed silt is highly organic and is producing detectable levels of lethal toxins, ammonia and nitrite. Fish sampling has shown good gill health but with excessive mucus present and poor internal organ health. Winter months will see increased toxin levels as plants stop utilising the excess nutrients. Problems are greater In Clark’s Lake than in Hand’s. Although the levels of toxins do not generally reach the lethal levels experienced during mass fish kills in the early season their fluctuations alongside other variables such as PH(acidity/alkalinity), oxygen level and temperature cause ongoing stress to the stock and make them more vulnerable to the toxins produced when algal blooms crash overnight.
Examination of the options with various experts has led us to the conclusion that physical de-silting of the lakes would be prohibitively expensive and impractical on a site adjacent to an SSSI and SAC and within the flood zone. The costs of such an exercise would be many hundreds of thousands of pounds way beyond any reserve held by the club and not realistically recoverable from the membership over time.
An alternative plan has been developed and will be put to committee for approval. It is at a manageable cost and has every chance of recovering the fisheries to satisfactory condition for stock to be reassessed and established in the next season in Hand’s lake […]