The catch per unit effort (CPUE) indices from the squid jig fishery have to date been expressed in terms of catch per man-hour (Roel, 1998). Industry has for many years questioned the use of man-hours as the unit of effort since it is alleged that the information contained in the database regarding the number of hours fished is unreliable. A re-analysis of the jig catch and effort data has therefore been undertaken, with the unit of effort revised to one of man-days, under the assumption (though see further discussion below) that the proportion of a day spent fishing has remained roughly unchanged over time.