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determine elk productivity. Calving home ranges were determined using Mohr's (1947) minimum convex polygon method. Calving home range fidelity was compared by examining amount of overlap between home ranges in consecutive years and by comparing distance between year to year calving home range activity centers ("arithmetic mean center", Dixon and Chapman, 1980; "geometric center", VanWinkle, 1975). Habitat utilization was determined by calculating the percentage of transmittered elk locations within each vegetation type. Details for all of the above methods are given in the 1985 Completion Report. ' RESULTS ' Trapping Elk trapping was conducted from July 31 to October 25, 1985. A list of all captures is given in Table 1 (Elk Trapping Results). A summary of trap success is given in Table 2 (Summary of Elk Trapping). 246 trap nights yielded 39 captures. Calves and bulls were released untagged. Thirteen new transmitters were placed on cow elk. Nine transmitters were placed on previously untagged elk. Two new transmitters were placed on elk which had old transmitters. One transmitter was placed on a cow which had been previously ear tagged as a calf and one transmitter was used to replace a conventional collar on a cow that had been previously tagged. No trap mortalities or significant injuries occurred during trapping. ' Monitoring 1 1 1 Monitoring between August 1, 1985 and July 31, 1986 of 29 transmittered elk yielded 375 locations (Table 3, Monthly Summary of Transmittered Elk Locations, and Table 4, Yearly Summary of Transmittered Elk Locations). Locations of 18 of these elk have been mapped (Tables 17 - 34 and associated maps). Eleven elk with transmitters were not mapped due to early mortality or transmitter failure (Table 16). There were also nineteen locations of conventionally collared, ear tagged and previously failed transmitter collared elk (Tables 15 and 16). Mortality During the current reporting period (August 1, 1985 to July 31, 1986) thirteen transmitters were last or failed. Four of these are attributed to mortalities and nine to transmitter failure or loss (Table 5, Mortality and Fate of Radio Transmittered Cow Elk). Three transmittered elk were harvested and one was lost as a result of wounding. Although no illegal harvest was documented, only three of the eight transmitter failures have been confirmed. However, four of the unconfirmed failures exceeded the guaranteed battery life of the transmitter so were anticipated transmitter failures. Returned collars were also received from two conventionally collared cow elk which were harvested (Table 6, Elk Harvested in 1985). -2-