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No bullheads, no Barbel, no roach no nothing. The importance of protecting the species lower down the food chain cannot be ignored.Apparently yes, bullheads are listed as a protected species. On the Wensum, I'd suggest that there are hundreds of them for every single roach and barbel, but according to the habitats directive it's the bullheads that need special protection. Pity they don't grow big enough to gulp down stray canoeists I say.
No bullheads, no Barbel, no roach no nothing. The importance of protecting the species lower down the food chain cannot be ignored.
Some species act as indicator species, in that when they decline everything else will. Insect life is the quickest to be effected by problems, hence fly life monitoring being the best way of seeing quickly any changes to a rivers condition. By the time a species such as Roach is noticed to be in decline it often may be too late to do anything about it. The fact that Bullheads have declined in nearly every water in the country and fly life is even worse, mainly since the change in agricultural practises in the 1940's is what has lead to a steady decline in everything else.
Get the insect life back and everything will follow. Not a nice quick solution like stocking with fish, but long term problems require long term solutions.