Evidence of non-circadian timing in a low response-cost daily Time-Place Learning task with pigeons Columba Livia.

Evidence of non-circadian timing in a low response-cost daily Time-Place Learning task with pigeons Columba Livia.

García-Gallardo, Daniel;Guevara, Francisco Aguilar;Moreno, Sergio;Hernández, Mitzi;Carpio, Claudio;
behavioural processes 2019 pp. 103942
216
garcagallardo2019evidencebehavioural

Abstract

Previous research has shown that rats require high response cost in order to display circadian timing in daily Time-Place Learning (TPL) tasks. For many possible reasons, no explicit effort to explore the effects of response cost on the performance of other species in these tasks has been made. Therefore, the present paper explores the effects of response cost on pigeon's performance on a daily TPL task. Head entry responses were reinforced according to a Random Interval schedule of reinforcement on one feeder during morning sessions and on another feeder during afternoon sessions. Feeders were located 8 cm apart for one group of birds (Group Near) and 56 cm apart for another group (Group Far). After 50 training sessions, testing began. Test sessions consisted of skipping either the morning or the afternoon session. Results show that most birds in the near group respond primarily on the opposite feeder during the first 20 seconds of the test sessions and then they switch to the correct feeder. On the other hand, most birds in Group Far respond at the same rate on both opposite and correct feeders during 20 seconds, and then they respond primarily on the correct feeder. The possibility of these data revealing non circadian timing for birds in a low response-cost daily TPL task is discussed along with the implications of such a finding for previous literature that claims that this type of performance could be unique to rats.

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