. The Canadian field-naturalist. 446 The Canadian Field-Naturalist Vol. 96. Figure 5. Simultaneous Marten movements. Male 12 (foraging area in centre) and Male 13 (foraging area at bottom right) for three successive days, 31 July to 2 August. niques this change in home range is not picked up so quickly. Also, from the analysis of two adjacent Marten home ranges, it is apparent that they do not overlap temporally and a mutual avoidance appears to be practised. A similar situation was shown by King (1975) for weasels. Because some Marten appear to be conditioned to traps and to use them as a sou
. The Canadian field-naturalist. 446 The Canadian Field-Naturalist Vol. 96. Figure 5. Simultaneous Marten movements. Male 12 (foraging area in centre) and Male 13 (foraging area at bottom right) for three successive days, 31 July to 2 August. niques this change in home range is not picked up so quickly. Also, from the analysis of two adjacent Marten home ranges, it is apparent that they do not overlap temporally and a mutual avoidance appears to be practised. A similar situation was shown by King (1975) for weasels. Because some Marten appear to be conditioned to traps and to use them as a source of food, the use of trapping for home-range studies may be of limited value. The movements of an individual Marten are proba- bly related to its hunting success, and this may explain the differences between the different Marten in this study. Some individuals may patrol and mark their foraging areas with scats when the population density of Marten is high, though this might not be necessary under low population densities. Until further work is done on the behaviour of Marten under different population densities, considering both females and males and the effect of transients upon the resident Martens, these questions cannot be answered. Radio- telemetry is a useful technique in studying Marten in the wild, particularly for habitat utilization in hetero- geneous habitats and for behavioural studies. For basic work on home ranges, however, it is probably best to use trapping and retrapping, since the results seem to be similar. Acknowledgments This research was made possible by a National Research Council Grant A9623 and grants from the Faculty of Science and the Faculty of Environmental Studies, York University. Assistance was also pro- vided by the Ontario Ministry of Natural Resources without which this work would not have been possi- ble. Thanks are due to the many people who helped, particularly to M. Crombie, S. Mihok, S. Pitch, and G. Rother. We would also like to than
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