New Zealand is an extremely sensitive country ecologically. The natural balance there is more fragile than most other (more environmentally established) countries on the planet. Who knows what the implications would be?

I'll go on to say also that no way on Earth should barbel be put in any of their river systems. It's sick how popular the fish is here and how much disrepect is had for the river habitat at the expense of some recapturing glory hunting.

I would feel desperately sorry for NZ if they had to experience modern day barbel anglers. It would destroy the best trout fishery on Earth.

Thankfully it aint ever gonna happen.

One thing we must be aware of is that Salmonids (rainbow, brown and brook trout) are not native to New Zealand either, but they are there and now well established. The problem with certain Cyprinids such as carp in particular is that they are bottom grubbers and create turbidity in the rivers, thus affecting good trout habitat.

New Zealand's trout fishing is world famous and attracts many tourists. Destroy that by introducing Cyprinids such as carp and barbel and there could well be a major environmental catastrophy.