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L'Ufficio caccia e pesca del cantone censirà i pesci nel fiume Brenno. Ogni anno, infatti, le analisi si svolgono in un corso d'acqua diverso e con una tecnica molto particolare, quella dell'elettropesca.
"È uno dei fiumi più salini del nostro cantone, conduce bene la corrente e quindi la tecnica è particolarmente efficace", ha spiegato Bruno Polli, responsabile dell'ufficio ai microfoni di Francesca Calcagno delle Cronache della Svizzera italiana.
"Attraverso un generatore creiamo un campo nell'acqua che stordisce i pesci. Questi sono poi catturati, misurati e restituiti all'acqua, ovviamente di nuovo svegli come prima".
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