Document Detail

Coping with rising food costs in a closed economy: feeding behavior and nocturnal hypothermia in pigeons.
MedLine Citation:
PMID:  3209959     Owner:  NLM     Status:  MEDLINE    
The pigeon's response to increasing fixed-ratio schedules in a 24-hr closed economy is marked by changes in feeding behavior during the daily light phase and by changes in body temperature during the dark phase. The time course of these responses to increasing behavioral cost of obtaining food is very different. Feeding is most affected immediately, within the first day of exposure to moderate fixed ratios. The number of times the pigeons produce the food hopper each day decreases, and the rate at which they eat from the food hopper (grams per minute) when it is available increases, as the fixed ratio is raised. Body temperature is affected later, falling to progressively lower resting levels during the dark phase as body weight drops at the higher fixed ratios when food intake is reduced. The changes in feeding and in body temperature that occur as the fixed-ratio schedule increases seem to reduce daily energy expenditures, within the constraints imposed by the experiment. The ascending and descending limbs of the bitonic function obtained when total daily operant responding is plotted as a function of fixed-ratio schedule in the closed economy is possibly related to the occurrence of thermoregulatory strategies for energy conservation. The energetic analysis of performances in the closed economy requires consideration of a variety of energetic strategies available to the species being studied.
M E Rashotte; D Henderson
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of the experimental analysis of behavior     Volume:  50     ISSN:  0022-5002     ISO Abbreviation:  J Exp Anal Behav     Publication Date:  1988 Nov 
Date Detail:
Created Date:  1989-02-23     Completed Date:  1989-02-23     Revised Date:  2010-09-09    
Medline Journal Info:
Nlm Unique ID:  0203727     Medline TA:  J Exp Anal Behav     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  441-56     Citation Subset:  IM    
Department of Psychology, Florida State University, Tallahassee 32306-1051.
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MeSH Terms
Body Temperature Regulation*
Body Weight
Circadian Rhythm*
Conditioning, Operant
Energy Metabolism*
Feeding Behavior*
Reinforcement Schedule*

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