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Pattern learning and spatial memory in rufous hummingbirds (Selasphorus rufus) McIntyre, Gordon D.
Abstract
In this study I examined spatial learning and memory in rufous hummingbirds. In laboratory experiments, hummingbirds rapidly learned 2 -dimensional patterns of rewards. They used landmarks to find reward sites. Once birds were visiting most feeders in rewarding areas and avoiding most feeders in non-rewarding areas, they persisted in the same areas after their profitabilities were reversed. This is strong evidence for cognitive mapping. Persistence subsided rapidly once the birds' behaviour was no longer applicable, followed rapidly by learning the altered reward patterns. The types of landmark information I provided significantly influenced both the rate and persistence of learning. Hummingbirds learned more rapidly using edge landmarks than central landmarks. They also used colour information about reward quality embedded in both kinds of markers, although this was not a strong benefit to learning. In one experiment, hummingbirds learned both spatial memory tasks and spatial associations. They learned spatial associations more rapidly than spatial memory tasks, achieving a high rate of performance after a very short time interval. Although spatial memory tasks required a slightly longer learning period, the birds' performance was eventually comparable to that on spatial association tasks. The speed of forming spatial associations between cue and reward sites depended strongly on the distance between them, although hummingbirds eventually achieved comparable performance regardless of separation. Birds were more resistant to change on spatial memory tasks than spatial association tasks. Greater separations between cue and reward resulted in more reliance on spatial memory and greater persistence of these memories in the face of change. Time spent foraging on rewarding patterns affected the birds' persistence when the pattern changed. After longer experience of successfully using a pattern of feeders, birds persisted longer in formerly rewarding behaviours. Time spent using a pattern of feeders influenced spatial memory tasks much more than spatial association ones.
Item Metadata
Title |
Pattern learning and spatial memory in rufous hummingbirds (Selasphorus rufus)
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Creator | |
Publisher |
University of British Columbia
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Date Issued |
1995
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Description |
In this study I examined spatial learning and memory in
rufous hummingbirds. In laboratory experiments,
hummingbirds rapidly learned 2 -dimensional patterns of
rewards. They used landmarks to find reward sites. Once
birds were visiting most feeders in rewarding areas and
avoiding most feeders in non-rewarding areas, they persisted
in the same areas after their profitabilities were reversed.
This is strong evidence for cognitive mapping. Persistence
subsided rapidly once the birds' behaviour was no longer
applicable, followed rapidly by learning the altered reward
patterns. The types of landmark information I provided
significantly influenced both the rate and persistence of
learning. Hummingbirds learned more rapidly using edge
landmarks than central landmarks. They also used colour
information about reward quality embedded in both kinds of
markers, although this was not a strong benefit to learning.
In one experiment, hummingbirds learned both spatial
memory tasks and spatial associations. They learned spatial
associations more rapidly than spatial memory tasks,
achieving a high rate of performance after a very short time
interval. Although spatial memory tasks required a slightly
longer learning period, the birds' performance was
eventually comparable to that on spatial association tasks.
The speed of forming spatial associations between cue and
reward sites depended strongly on the distance between them,
although hummingbirds eventually achieved comparable
performance regardless of separation.
Birds were more resistant to change on spatial memory
tasks than spatial association tasks. Greater separations
between cue and reward resulted in more reliance on spatial
memory and greater persistence of these memories in the face
of change. Time spent foraging on rewarding patterns
affected the birds' persistence when the pattern changed.
After longer experience of successfully using a pattern of
feeders, birds persisted longer in formerly rewarding
behaviours. Time spent using a pattern of feeders
influenced spatial memory tasks much more than spatial
association ones.
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Extent |
7960888 bytes
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Genre | |
Type | |
File Format |
application/pdf
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Language |
eng
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Date Available |
2009-01-11
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Provider |
Vancouver : University of British Columbia Library
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Rights |
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.
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DOI |
10.14288/1.0086804
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URI | |
Degree | |
Program | |
Affiliation | |
Degree Grantor |
University of British Columbia
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Graduation Date |
1995-05
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Campus | |
Scholarly Level |
Graduate
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Aggregated Source Repository |
DSpace
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Item Media
Item Citations and Data
Rights
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.