Well we have to take into account that the EA have stocked over the last 10 years about 400,000 (or maybe more) Calverton mini barbel into the Trent catchment, this includes rivers like the Dove, the Derwent, the Anchor, The Mease, the Tame, the Soar and the Trent its self, the river at high tide will be brackish below Collingham, mitten crabs during their baby and peeler stages will be very nutritional food source for the barbel as will the huge runs of Lampreys the river gets, being tidal the river will be full of nutrients that the big females will thrive off as the river ebbs and flows, not forgetting the HNV baits that go into the river, the Trent as an inland waterway runs warmer than a spate river like the Wye or Severn, I have noted 2c or 3c higher in the winter months, may be barbel feed for longer periods because of this, the tidal Trent is a very unnatural barbel environment, its numbers of huge female barbel confirm this, my view is that it wont last forever as nothing does, the lower Trent as a barbel fishery is a phenomenon and its barbel are phenomenal...