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Urine marking is thought to play a pivotal role in territory demarcation by red foxes (Vulpes vulpes (L., 1758)), but little is known about how individuals respond to alien scent marks, and
whether there are sex-related differences in territorial defense. We radio-tracked dominant male and female urban foxes before and after synthetic fox urine was applied to approximately a third of their territories and compared spatial and behavioral reactions both before and after scent application
and with foxes on territories where no urine was applied. Home-range boundaries of male foxes shifted towards the scent-marked area, but this change did not affect the total territory size. Larger males shifted their home ranges to a greater degree than small males. Scent application did not
affect total activity, but males spent more time in the scent-marked area. Behaviors such as distance moved per night and speed of movement did not differ before and after application, but foxes searched a greater percentage of their home range each night following scent marking. Females showed
no significant spatial or behavioral response to the synthetic scent marks. Overall, responses of foxes to synthetic scent marks were male-biased and related to changes in space use rather than movement behaviors.
Published since 1929, this monthly journal reports on primary research contributed by respected international scientists in the broad field of zoology, including behaviour, biochemistry and physiology, developmental biology, ecology, genetics, morphology and ultrastructure, parasitology and pathology, and systematics and evolution. It also invites experts to submit review articles on topics of current interest.