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→Relationship with Human Activity
==Relationship with Human Activity==
==Relationship with Human Activity==
For many generations domestic cats have been exposed to a different set of selection pressures related to photoperiodicity of behaviour, the availability of prey and the presence of humans. In these altered environmental conditions cats which continued to follow a pattern of entrainment with greater levels of activity during the twilight period might have have been at a survival disadvantage. Diversity of level of photoperiod entrainment in cats would be expected.
For many generations domestic cats have been exposed to a different set of selection pressures related to photoperiodicity of behaviour, the availability of prey and the presence of humans. In these altered environmental conditions, cats which continued to follow a pattern of entrainment with greater levels of activity during the twilight period might have have been at a survival disadvantage. Diversity of level of photoperiod entrainment in cats would be expected.
The activity of domestic cats is also significantly influenced by human activity. In conditions that more closely resemble an average domestic environment, cats that were more closely involved with their owners showed greater levels of activity during daylight<ref>Piccione, G., Marafioti, S., Giannetto, C., Panzera, M., Fazio, F., (2013) Daily rhythm of total activity pattern in domestic
cats (''Felis silvestris catus'') maintained in two different housing conditions. ''Journal of Veterinary Behavior.'' ePub online.</ref>.
The activity of domestic cats is also significantly influenced by human activity. In conditions that more closely resemble an average domestic environment, cats that were more closely involved with their owners showed greater levels of activity during daylight<ref>Piccione, G., Marafioti, S., Giannetto, C., Panzera, M., Fazio, F., (2013) Daily rhythm of total activity pattern in domestic
cats (''Felis silvestris catus'') maintained in two different housing conditions. ''Journal of Veterinary Behavior.'' ePub online.</ref>.