Document Detail

Rats (Rattus norvegicus) and pigeons (Columbia livia) are sensitive to the distance to food, but only rats request more food when distance increases.
MedLine Citation:
PMID:  22989930     Owner:  NLM     Status:  MEDLINE    
Three experiments investigated foraging by rats and pigeons. In Experiment 1, each response on a manipulandum delivered food to a cup, with the distance between the manipulandum and the cup varying across conditions. The number of responses made before traveling to collect and eat the food increased with distance for rats, but not for pigeons. In Experiment 2, two manipulanda were placed at different distances from a fixed food source; both pigeons and rats preferentially used the manipulandum closest to the food source. Experiment 3 was a systematic replication of Experiment 1 with pigeons. In different conditions, each peck on the left key increased the upcoming hopper duration by 0.5, 1.5 or 2.5s. Completing a ratio requirement on the right key of 1, 4, 8, 16 or 32 pecks, depending on the condition, then produced the food hopper for a duration that depended on the number of prior left pecks. As the ratio requirement increased on the right key, pigeons responded more on the left key and earned more food. Overall, the results replicate previous research, underlining similarities and differences between these species. The results are discussed in terms of optimal foraging, reinforcer sensitivity and delay discounting.
Mark P Reilly; Diana Posadas-Sánchez; Lauren C Kettle; Peter R Killeen
Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Extramural     Date:  2012-09-16
Journal Detail:
Title:  Behavioural processes     Volume:  91     ISSN:  1872-8308     ISO Abbreviation:  Behav. Processes     Publication Date:  2012 Nov 
Date Detail:
Created Date:  2012-11-05     Completed Date:  2013-04-18     Revised Date:  2013-11-06    
Medline Journal Info:
Nlm Unique ID:  7703854     Medline TA:  Behav Processes     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  236-43     Citation Subset:  IM    
Copyright Information:
Copyright © 2012 Elsevier B.V. All rights reserved.
Arizona State University, United States.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Analysis of Variance
Conditioning, Operant / physiology*
Discrimination (Psychology) / physiology
Feeding Behavior / physiology*
Reinforcement (Psychology)
Reinforcement Schedule
Grant Support

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

Previous Document:  Expression of P16 cell cycle inhibitor in human cord blood CD34+ expanded cells following co-culture...
Next Document:  Tumor promoting functions of TGF-? in CML-initiating cells.