252. Percussive killing using a priest (a small club) is highly effective, when properly carried out, in bringing about insensibility until death supervenes. However, the strength of the blow must be sufficient to ensure the fish does not recover. The efficiency of the percussive kill could be reduced if large numbers of fish were being killed and it is therefore important that those undertaking any such operation are adequately trained in its technique and are rested before they become tired and inefficient.