The Conversation (EUA)
Em 2020: 4 notícias
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Culverts – the major threat to fish you've probably never heard of

Publicado em 06 agosto 2020
You probably cross rivers every day without realising it. Beneath the concrete underfoot are culverts – tunnels installed under roads and railways that allow rivers to pass from one side to the other. Like bridges, culverts allow people to cross rivers, but unlike bridges, culverts often don’t allow the fishes living in those rivers to cross roads. Why worry about fishes crossing roads? A recent study found that, on average, the abundance of 247 migratory fish species has fallen by [...]