Carp - among 100 "world’s worst" invaders

Authors: Invasive Species Specialist Group of the International Union for Conservation of Nature

The introduction of carp by anglers, for their bit of fun, has caused havoc to native wildlife across the world.

anglers encourage alien fish - carp
"This species has been nominated as among 100 of the "World’s Worst" invaders."

"Carp has been introduced and commonly stocked around the world to support commercial and recreational fisheries."

"Transfer of carp by anglers, either through accident or ignorance, or deliberately to establish new fishing grounds, has been recognised as a major source of invasion into new catchments both in Australia and New Zealand."
Location Specific Impacts
This is an edited-down list from the database.

Argentina
Ecosystem change
Reduction in native biodiversity

Australian Capital Territory
Disease transmission

Azores (Portugal)
Habitat alteration

Canada
Ecosystem change
Reduction in native biodiversity

Chile
Ecosystem change

Central Mexico (Mexico)
Habitat alteration Morocco
Ecosystem change

Congo, Republic of the
Ecosystem change

Costa Rica
Economic/Livelihoods

Cyprus
Economic/Livelihoods
Ecosystem change

Gulf of Mexico US Watershed
Modification of natural benthic communities
Predation

India
Competition
Ecosystem change

Kenya
Ecosystem change

Lake Naivasha (Kenya)
Ecosystem change
Reduction in native biodiversity

Lake Ontario (North America)
Modification of nutrient regime
Reduction in native biodiversity

Lake Utah (United States)
Habitat alteration
Reduction in native biodiversity

Madagascar
Competition
Ecosystem change

Malawi
Ecosystem change

Mexico
Disease transmission
Reduction in native biodiversity
Competition
Habitat alteration
Predation

New South Wales (Australia)
Disease transmission
Ecosystem change
Modification of nutrient regime
Physical disturbance
Predation
Reduction in native biodiversity

New Zealand
Ecosystem change
Reduction in native biodiversity

Pakistan
Reduction in native biodiversity

Papua New Guinea
Competition
Ecosystem change
Reduction in native biodiversity

Poland
Competition
Habitat alteration

Singapore
Ecosystem change

South Africa
Disease transmission

South Australia
Reduction in native biodiversity

Switzerland
Ecosystem change

Tana River (Kenya)
Reduction in native biodiversity

Tunisia
Ecosystem change

Turkmenistan
Hybridisation

United Kingdom
Habitat alteration

Uruguay
Ecosystem change

Venezuela
Reduction in native biodiversity

Xingyun Lake (China)
Competition
Habitat alteration

Fish Pain