Abstract
The ability of nonhuman animals to project individual actions into the future is a hotly debated topic. We describe the caching behaviour of tayras (Eira barbara) based on direct observations in the field, pictures from camera traps and radio telemetry, providing evidence that these mustelids pick and cache unripe fruit for future consumption. This is the first reported case of harvesting of unripe fruits by a nonhuman animal. Ripe fruits are readily taken by a variety of animals, and tayras might benefit by securing a food source before strong competition takes place. Unripe climacteric fruits need to be harvested when mature to ensure that they continue their ripening process, and tayras accurately choose mature stages of these fruits for caching. Tayras cache both native (sapote) and non-native (plantain) fruits that differ in morphology and developmental timeframes, showing sophisticated cognitive ability that might involve highly developed learning abilities and/or prospective thinking.
Similar content being viewed by others
References
Arenas-Ocampo ML, Evangelista-Lozano S, Arana-Errasquin R, Jiménez-Aparicio A, Dávila-Ortíz G (2003) Softening and biochemical changes of sapote mamey fruit (Pouteria sapota) at different development and ripening stages. J Food Biochem 27:91–107
Armstrong SJ, Botzler RG (2003) The animal ethics reader. Routledge, Taylor and Francis, London
Bezerra BM, Barnett AA, Souto A, Jones G (2009) Predation by the tayra on the common marmoset and the pale-throated three-toed sloth. J Ethol 27:91–96
Bisbal FJ (1986) Food habits of some neotropical carnivores in Venezuela (Mammalia, Carnivora). Mammalia 50:329–340
Clayton NS, Dickinson A (1998) Episodic-like memory during cache recovery by scrub jays. Nature 395:272–274
Correia SPC, Dickinson A, Clayton NS (2007) Western scrub-jays anticipate future needs independently of their current motivational state. Curr Biol 17:856–861
Dally JM, Emery NJ, Clayton NS (2006) Food-caching western scrub-jays keep track of who was watching when. Science 312:1662–1665
Dearing MD (1997) The manipulation of plant toxins by a food-hoarding herbivore, Ochotona princeps. Ecology 78:774–781
Dennet DC (1997) Kinds of minds: towards an understanding of consciousness. Basic, New York, USA
Descartes R (1998) Meditations on first philosophy. In: Cress DA (ed) Discourse on method and meditations on first philosophy, 4th edn. Hackett, Indianapolis
Dukas R (1998) Cognitive ecology: the evolutionary ecology of information processing and decision making. The University of Chicago Press, USA
Emery NJ, Clayton NS (2001) Effects of experience and social context on prospective caching strategies in scrub jays. Nature 414:443–446
Guiracocha G, Harvey C, Somarriba E, Krauss U, Carillo E (2001) Conservación de la biodiversidad en sistemas agroforestales con cacao y banano en Talamanca, Costa Rica. Agroforestería en las Américas 8:7–11
Heyes CM (1993) Anecdotes, training, trapping and triangulating: do animals attribute mental states? Anim Behav 46:177–188
Janzen D (1983) Eira barbara (Tolomuco, Tayra). In: Janzen DH (ed) Costa Rican natural history. The University of Chicago Press, Chicago
Leaver LA, Hopewell L, Caldwell C, Mallarky L (2007) Audience effects on food caching in grey squirrels (Sciurus carolinensis): evidence for pilferage avoidance strategies. Anim Cogn 10:23–27
McDade LA, Bawa KS, Hespenheide HA, Hartshorn GS (1994) La Selva: ecology and natural history of a neotropical rain forest. University of Chicago Press, USA
Mulcahy NJ, Call J (2006) Apes save tools for future use. Science 312:1038–1040
Offem JO, Njoku PC (1993) Mineral distribution in the fruits of the plantain plant (Musa paradisiaca) in relation to mode and degree of maturation. Food Chem 48:63–68
Osvath M (2009) Spontaneous planning for future stone throwing by a male chimpanzee. Curr Biol 19:R190–R191
Osvath M, Osvath H (2008) Chimpanzee (Pan troglodytes) and orangutan (Pongo abelii) forethought: self-control and pre-experience in the face of future tool use. Anim Cogn 11:661–674
Presley SJ (2000) Eira barbara. Mamm Spec 636:1–6
Raby CR, Clayton NS (2009) Prospective cognition in animals. Behav Process 80:314–324
Raby CR, Alexis DM, Dickinson A, Clayton NS (2007) Planning for the future by western scrub-jays. Nature 445:919–921
Reid FA (1997) A field guide to the mammals of Central America and southeast Mexico. Oxford University Press, New York
Shettleworth SJ (2001) Animal cognition and animal behaviour. Anim Behav 61:277–286
Smith CC, Reichman OJ (1984) The evolution of food caching by birds and mammals. Ann Rev Ecol Syst 15:329–351
Stevens CE, Hume ID (1998) Contributions of microbes in vertebrate gastrointestinal tract to production and conservation of nutrients. Physiol Rev 78:393–427
Suddendorf T (2006) Foresight and evolution of the human mind. Science 312:1006–1007
Suddendorf T, Corballis MC (2008) New evidence for animal foresight? Anim Behav 75:e1–e3
Verhoog H, Visser T (1997) A view of intrinsic value not based on animal consciousness. In: Dol M, Kasanmoentalib S, Lijmbach S, Rivas E, van den Bos R (eds) Animal consciousness and animal ethics, perspectives from the Netherlands. Van Gorcum, The Netherlands, pp 223–232
Acknowledgements
CR-USA Foundation and the Organization for Tropical Studies provided funding for this study. We are very grateful to Johanna Hurtado, members of TEAM Project at La Selva, Johel Cháves-Campos and Elizabeth Congdon, for loan of equipment and assistance with logistics. We also thank Orlando Vargas and Ricardo Bedoya for plant identification. William Eberhard, Gilbert Barrantes and Joel Alvarado provided valuable feedback during the course of this study. Previous versions of the manuscript were improved by comments from Ximena Nelson, Martin Whiting and three anonymous reviewers.
Author information
Authors and Affiliations
Corresponding author
Additional information
Communicated by: Sven Thatje
Electronic supplementary material
Below is the link to the electronic supplementary material.
ESM 1
(PDF 11550 kb)
Rights and permissions
About this article
Cite this article
Soley, F.G., Alvarado-Díaz, I. Prospective thinking in a mustelid? Eira barbara (Carnivora) cache unripe fruits to consume them once ripened. Naturwissenschaften 98, 693–698 (2011). https://doi.org/10.1007/s00114-011-0821-0
Received:
Revised:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s00114-011-0821-0