More or less: spontaneous quantity discrimination in the domestic cat
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We examined spontaneous quantity discrimination in untrained domestic cats in three food choice experiments. In Experiment 1, we presented the cats with two different quantities of food in eight numerical combinations. Overall, the subjects chose the larger quantity more often than the smaller one, and significantly so when the ratio between the quantities was less than 0.5. In Experiment 2, we presented the cats with two pieces of food in four different size combinations. Again, subjects chose the larger piece above chance, although not in the combination where the largest item was presented. In Experiment 3, a subset of the cats was presented multiple times with two different quantities of food, which were hidden from view. In this case, the cats did not choose the larger quantity more often than the smaller one, suggesting that in the present experiments they mainly used visual cues when comparing quantities. We conclude that domestic cats are capable of spontaneously discriminating quantities when faced with different numbers or sizes of food items, and we suggest why they may not always be motivated to choose the larger quantity. In doing so, we highlight the advantages of testing spontaneous choice behavior, which is more likely to reflect animals’ everyday manner of responding than is the case when training them in order to test their absolute limits of performance which may not always coincide with their daily needs.
KeywordsCognition Number discrimination Size discrimination Spontaneous responding Ecological relevance Felis silvestris catus
Financial support was provided by a research grant from the Universidad Nacional Autónoma de México (DGAPA- IN205513), to O. B. by the Postdoctoral Fellowship Program of the Universidad Nacional Autónoma de México, and to A. U. by a student grant from the Consejo Nacional de Ciencia y Tecnología, Mexico. We thank Carolina Rojas for excellent technical and bibliographical assistance, and cat owners (Rebeca Cruz, Cecilia Echeverría, Marlene Flores, Valeria Flores, Joel Güemez, Vanessa Hernández, Elisa Jacinto, Santiago Ortega, Sofía Ramírez) for allowing us repeated access to their homes and cats. Special thanks to Irene Urrutia for the design of Figure 1.
All applicable international, national, and/or institutional guidelines for the care and use of animals were followed. This article does not contain any studies with human participants performed by any of the authors.
- Akenson JJ, Nowak MC, Henjum MG, Witmer GW (2003) Characteristics of mountain lion bed, cache and kill sites in northeastern Oregon. In: Becker S, Bjornlie D, Linzey F, Moody D (eds) Proceedings of the seventh mountain lion workshop. Wyoming Game and Fish Department, Wyoming, pp 111–118Google Scholar
- Diggle P, Liang K-Y, Zeger S (1994) Analysis of longitudinal data. Oxford University Press, OxfordGoogle Scholar
- Fitzgerald BM, Karl BJ (1986) Home range of feral house cats (Felis catus L.) in forest of the Orongorongo Valley, Wellington, New Zealand. N Z J Ecol 9:71–82Google Scholar
- Flay C, He X, Wang Q (2009) Influence of male density on the courtship and mating duration of male rice weevils, Sitophilus oryzae. N Z Plant Prot 62:76–79Google Scholar
- Hardin JW, Hilbe JM (2012) Generalized estimating equations, 2nd edn. Chapman and Hall, New YorkGoogle Scholar
- Hauser MD, Spelke E (2004) Evolutionary and developmental foundations of human knowledge. In: Gazzaniga MS (ed) The cognitive neurosciences, vol 3. MIT Press, Cambridge, pp 853–864Google Scholar
- IBM SPSS Statistics (2011) 20.0 IBM Corp., Armonk, NYGoogle Scholar
- Laundré JW, Hernández L (2003) Winter hunting habitat of pumas Puma concolor in northwestern Utah and southern Idaho, USA. Wildl Biol 9:123–129Google Scholar
- STATISTICA (data analysis software system) (2011) 10.0 StatSoft Inc., Tulsa, OklahomaGoogle Scholar
- The Humane Society of the United States (2011) U.S. pet ownership statistics. http://www.humanesociety.org/issues/pet_overpopulation/facts/pet_ownership_statistics.html
- Turner DC, Bateson P (2014) The domestic cat: the biology of its behaviour, 3rd edn. Cambridge University Press, Cambridge, UKGoogle Scholar