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==Olfactory communication==
 
==Olfactory communication==
 
Apart from providing other cats with information about ownership and usage of territory, scent marks also convey information about the identity of the depositor, its sex, health and reproductive status. This enables more complex social organisation than merely avoidance, with cats choosing to avoid an area or attempt to gain control of it, depending on the threat posed by the current resident and the need to gain access to the resources included in that area.  
 
Apart from providing other cats with information about ownership and usage of territory, scent marks also convey information about the identity of the depositor, its sex, health and reproductive status. This enables more complex social organisation than merely avoidance, with cats choosing to avoid an area or attempt to gain control of it, depending on the threat posed by the current resident and the need to gain access to the resources included in that area.  
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Scent marks are not only a signal to other cats, but also carry meaning for the depositor. In the core territory, cats are more likely to be in a parasympathetic state of arousal, in preparation for activities such as resting, feeding and grooming. Outside the core territory, some degree of sympathetic arousal is always required, as the individual is either vulnerable or engaged in hunting. Facial and flank marks may provide a chemical signal to the cat that favours a parasympathetic state in all individuals that are present, reducing the likelihood of conflict in colonies where several cats share a common core territory.
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