251. Where electrical methods are used, trout are usually stunned and eviscerated immediately afterwards. This is acceptable as long as the process of evisceration includes removal of the heart. The strength and duration of the current used is important if fish are not to recover consciousness before evisceration. Fish could also be killed by electric current. Various methods are used to stun trout electrically. In the UK electrical stunning is limited at present to small scale operations although it is used on a commercial scale in Denmark and elsewhere.