Read more about the article Water canals as invasion highways for alien fish species
The Sundays Valley water-transfer canal, which distributes water and fishes from the Orange-Fish-Sundays Inter-Basin Water Transfer Scheme to hundreds of irrigation ponds used for citrus farming.

Water canals as invasion highways for alien fish species

Freshwater fish invasions are a major source of environmental homogenisation around the world; unique species assemblages are increasingly being overwhelmed by large numbers of introduced species. While active human-mediated introductions contribute to this process, there are also many passive pathways of fish introductions.

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