La trota marmorata è stata eletta Pesce dell’anno 2024 dalla Federazione Svizzera della Pesca (FSP). Questa ambasciatrice della “biodiversità unica” dei pesci del sud delle Alpi deve oggi lottare per la sua sopravvivenza.
Perfettamente mimetizzata, la trota marmorata (Salmo marmoratus) ha dominato per migliaia di anni le acque della Svizzera meridionale. Ma oggigiorno è presente solo nel Lago Maggiore e in alcuni corsi d’acqua isolati del Ticino, in Val Bregaglia e Val Poschiavo. Inoltre, molte trote marmorate non sono più geneticamente pure, ma ibridate con trote del ceppo atlantico.
È preoccupante che quasi nessuno riesca più a scorgere una trota marmorata
Roberto Zanetti, Federazione Svizzera di Pesca FSP
Il fatto che questo pesce sia a rischio si deve a pratiche di ripopolamento errate e agli ostacoli alla migrazione dei pesci. La trota marmorata risale i fiumi per diversi chilometri per deporre le uova, ma se la migrazione dei pesci è interrotta da ostacoli, la riproduzione è fortemente limitata.
Notiziario delle 11:00 del 02.01.2024
Notiziario 02.01.2024, 11:30
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