Well consider that there just might have been too many Barbel in the 'Halcyon' days we all look back at, and think well there were more Barbel so it had to be better...or did it?
Personally I am not of the opinion that Rivers such as the Teme that were rammed full of Barbel was good for the balance and the sustainability of the river as far as other equally as important such as the Chub, Dace and so on.
I would much rather see the River with diversity and health rather than a single species river that we judge on it's merits purely as how many Barbel single species anglers can haul out.
I would worry if other species were in decline on the Teme, and they appear not to be, Chub are more evident and even Grayling too, so that has to be good news doesn't it? OK the Barbel are not so prolific, and that has made what we do more of a challenge, so what? How much more satisfying is that when we do catch, I guess if we could all catch 10 barbel every session we would soon find that boring too.
However there is one species that is really in decline,
The Lesser Spotted Guide, in fact they are never spotted now on the Teme, this is the one creature that has suffered the most, and possibly might never recover, although I hear there are still small colonies to be seen on the Wye