In the long history past, prior to the 1960s and in the 1960s, as I understand it, some cull programs were tried. I don't have all the data of those programs in the distant past.
I think the most recent example would be from 1997 to 1998. There was a cull of 55 seals in the Puntledge River, which was conducted by the department. It looked at seals that were consuming salmon in that area.