Tufted capuchins (Cebus apella) use weight and sound to choose between full and empty nuts. (Articolo in rivista)

Type
Label
  • Tufted capuchins (Cebus apella) use weight and sound to choose between full and empty nuts. (Articolo in rivista) (literal)
Anno
  • 2003-01-01T00:00:00+01:00 (literal)
Alternative label
  • Visalberghi E., Neel.C. (2003)
    Tufted capuchins (Cebus apella) use weight and sound to choose between full and empty nuts.
    in Ecological psychology
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Visalberghi E., Neel.C. (literal)
Pagina inizio
  • 215 (literal)
Pagina fine
  • 228 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 15 (literal)
Rivista
Note
  • ISI Web of Science (WOS) (literal)
Titolo
  • Tufted capuchins (Cebus apella) use weight and sound to choose between full and empty nuts. (literal)
Abstract
  • Wild capuchins feed on high-energy husked fruits. Field researchers suggested that capuchins select beforehand the fruits which are worthwhile to crack open. We assessed whether captive capuchins use sound and/or weight as proximal causes to infer the fullness of a nut (full nuts are heavier and produce a low pitched frequency sound when tapped). Two subjects had to choose between a nut shell containing food and another nut shell without food differing in weight and sound (phase 1), or weight (phases 2 and 4), or sound (phase 3). Both subjects readily solved phase 1 and 2. The only subject who spontaneously finger-tapped on the nut shells solved phase 3. The minimal difference in weight perceived ranged between 2.1 and 3 g. Therefore, as expected by ecological psychology and optimal foraging theory, data suggest that capuchins seek information to discriminate effectively between full and empty nuts before going through the costly opening process. (literal)
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