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A netful of silver darlings from Frosty
In more misogynistic times it was said ‘give a man a fish and he’ll eat for a day. Teach him to fish and he’ll eat for life’ — PETER FROST proposes a new version: teach a family to fish and they will eat well. At least until pollution, plastic debris, global warming, floods, droughts and overfishing end it all
Salvelinus alpinus, better known as the Arctic char [Nils Rinaldi/CC]

LET’S start with some good news. I have written many times about the demise of our native white-clawed chalk stream crayfish (Austropotamobius pallipes). These had been forced out of their habitat by American Red Signal crayfish (Pacifastacus leniusculus). These invaders had escaped from commercial crayfish farms.    

Worse, these unwelcome US critters also carried a fatal crayfish pox that killed our natives but to which they were immune.   

Recent surveys and river counts however, have shown that populations of native white-claws are doing much better, whereas the numbers of non-native crayfish are falling fast.   

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