Introduced European carp now outnumber native fish in the rivers of New South
Wales, a two-year study has found. Some reaches of the Murray-Darling river
system contain one carp per square metre. And although some 55 000 fish were
sampled, 16 native species were not detected at all. 51¶¯Âþs with the New
South Wales Fisheries Research Institute say that dams and irrigation projects
have altered river flows, favouring the carp.
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