Hi, as already mentioned watch out for the natives, also be a bit carefull how you go about trapping them, two guys local to me were in court not so long back for trapping signals without a licence, would think the ea would be quite happy for folk to catch them considering the damage they are doing, but i think they are been cautious for the white claws, you can get a licence for nothing but it aint exactly made easy.
Having said all this, i have not had much success with them as a bait but they eat ok if you can be bothered lol.
Rob.