The following are the biggest percentage gainers on the TSX Venture Exchange in mid afternoon trading with their price movements THE CANADIAN BIOCEUTICAL (BCC.V), $0.18, +0.06, +45.83% NORTHERN VERTEX MINING (NEE.V), $0.25, +0.06, +31.58% DOLLY VARDEN SILVER (DV.V), $0.1850,