Nearly a quarter of freshwater animal ... and dams which also block fish migrations, while overfishing and the introduction of invasive non-native species are particularly driving extinctions.

Freshwater pearls are still cultured by inserting small pieces of native mussel shell into oysters ... quality and separated mussels from the host fish on which their survival depends. Thirty-five ...

Potential threats to native fish populations in Bhutan’s major river basins include the construction of dams, artificial noise, heavy metals pollution, the introduction of non-native fishes, and micro ...

But the angling industry relies on healthy freshwater ecosystems to support thriving populations of fish. Recreational fishing has to be well managed to avoid issues such as the introduction of ...