Record:   Prev Next
作者 Brodbeck, David Richard
書名 Comparative tests of memory in a storing and a nonstoring bird species
國際標準書號 9780315926462
book jacket
說明 121 p
附註 Source: Dissertation Abstracts International, Volume: 55-12, Section: B, page: 5555
Supervisor: Sara J. Shettleworth
Thesis (Ph.D.)--University of Toronto (Canada), 1994
Some bird species such as the black-capped chickadee (Parus atricapillus) store food in the wild and recover it using memory. It has been hypothesized that this storing life-style may have lead to an adaptive specialization of spatial memory. To test this hypothesis chickadees were compared with dark-eyed juncos (Junco hyemalis) in a series of memory tasks to determine what type of cues control their behavior. In a series of experiments in an aviary subjects inspected four feeders, one of which was baited. Different feeders were used in different spatial locations on each trial. The subjects returned after 5 min to find the baited feeder. Tests with transformations of the feeder array showed that chickadees used the same type of memory in a food-storing version of the task, chickadees were controlled primarily by spatial cues, and that juncos were controlled by both spatial cues and local color and pattern cues on the feeders. The task was then adapted to an operant environment using a computer touchscreen. A similar difference of cue control was found between the species. The subjects may have differed because of memory (i.e, chickadees remember color while juncos remember color and space) or response bias (i.e. both species remembered both classes of cues but the chickadees were biased to choose to respond to spatial cues while the juncos had no such bias). These two explanations were examined by directly testing the subjects for their memory of the color or spatial location of a stimulus on a computer touchscreen that had both of these elements (a compound stimulus). The juncos performed about equally on space and color trials, while performing best when they were tested for the memory of the entire compound, while chickadees remembered the spatial element as well as the compound, but performed at chance on color trials. This overshadowing of color by space in the chickadee may indicate that food-storing birds are specialized not only in how well they perform some task, but in what they remember
School code: 0779
DDC
Host Item Dissertation Abstracts International 55-12B
主題 Psychology, Behavioral
Psychology, Experimental
0384
0623
Alt Author University of Toronto (Canada)
Record:   Prev Next