Can wild common marmosets ( Callithrix jacchus ) solve the parallel strings task

摘要: Patterned string tasks are a test of perceptual capacity and the understanding means-end connections. Primates can solve complex forms this task in laboratories. However, may not indicate level such cognition that is commonly employed wild, where decision-making time often short distractions as predator avoidance competition between conspecifics prevalent. The current study tests whether wild common marmosets (Callithrix jacchus) successfully complete simplest form patterned task, parallel strings, while their natural environment. Although 12 out 13 could previous laboratory-based studies on primates, errors at by all primate species tested were consistently lower than present study. This probably explained added difficulties imposed setting study, exemplified significant increase observed vigilance behaviour subject animals prior to attempts unsuccessful. undertaking situ provides more reasonable representation levels cognitive expressed do task.