sam vimes
Well-known member
Unless we want to be massively pedantic this is proof to me that barbel will not achieve a viable population in a natural pool.
The same can be said for several species, carp being one. They do not occur naturally in the vast majority of waters and rarely breed successfully in the vast majority of UK waters. I also suspect that the idea that fish magically establish populations in previously barren waters is massively overstated.
As I've said before, what difference does it make where the fish come from and how they get into a water, provided they don't suffer and aren't pinched? In addition, it could be argued that barbel will not, and do not, naturally achieve viable populations in plenty of the rivers that they are currently having to supplement stocks.