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Abstract:

Females of avian brood parasites, like the shiny cowbird (Molothrus bonariensis), locate host nests and on subsequent days return to parasitize them. This ecological pressure for remembering the precise location of multiple host nests may have selected for superior spatial memory abilities. We tested the hypothesis that shiny cowbirds show sex differences in spatial memory abilities associated with sex differences in host nest searching behavior and relative hippocampus volume. We evaluated sex differences during acquisition, reversal and retention after extinction in a visual and a spatial discrimination learning task. Contrary to our prediction, females did not outperform males in the spatial task in either the acquisition or the reversal phases. Similarly, there were no sex differences in either phase in the visual task. During extinction, in both tasks the retention of females was significantly higher than expected by chance up to 50 days after the last rewarded session (~85-90% of the trials with correct responses), but the performance of males at that time did not differ than that expected by chance. This last result shows a long-term memory capacity of female shiny cowbirds, which were able to remember information learned using either spatial or visual cues after a long retention interval. © 2015 Elsevier B.V.

Registro:

Documento: Artículo
Título:Sex differences in retention after a visual or a spatial discrimination learning task in brood parasitic shiny cowbirds
Autor:Astié, A.A.; Scardamaglia, R.C.; Muzio, R.N.; Reboreda, J.C.
Filiación:Instituto Argentino de Investigaciones de las Zonas Aridas, CONICET, Av. Ruiz Leal s/n-Parque General San Martín, Mendoza, 5500, Argentina
Departamento de Ecología, Genética y Evolución, IEGEBA-CONICET, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Pabellón II Ciudad Universitaria, Buenos Aires, C1428EGA, Argentina
Laboratorio de Biología del Comportamiento, IBYME-CONICET, Vuelta de Obligado 2490, Buenos Aires, C1428ADN, Argentina
Palabras clave:Brood parasitism; Cowbirds; Sex differences; Spatial memory; brain; brood parasitism; host location; hypothesis testing; learning; long-term change; memory; nest site; passerine; sex-related difference; site selection; spatial analysis; visual cue; animal experiment; Article; bird; brood parasite; female; hippocampus; long term memory; male; Molothrus bonariensis; nonhuman; predictive value; sex difference; spatial discrimination; spatial memory; species extinction; task performance; visual discrimination learning test; animal; animal behavior; discrimination learning; nesting; Passeriformes; physiology; sex difference; Aves; Molothrus; Molothrus bonariensis; Animals; Behavior, Animal; Discrimination Learning; Female; Hippocampus; Male; Memory, Long-Term; Nesting Behavior; Passeriformes; Retention (Psychology); Sex Factors; Spatial Memory
Año:2015
Volumen:119
Página de inicio:99
Página de fin:104
DOI: http://dx.doi.org/10.1016/j.beproc.2015.07.016
Título revista:Behavioural Processes
Título revista abreviado:Behav. Processes
ISSN:03766357
CODEN:BPROD
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03766357_v119_n_p99_Astie

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Citas:

---------- APA ----------
Astié, A.A., Scardamaglia, R.C., Muzio, R.N. & Reboreda, J.C. (2015) . Sex differences in retention after a visual or a spatial discrimination learning task in brood parasitic shiny cowbirds. Behavioural Processes, 119, 99-104.
http://dx.doi.org/10.1016/j.beproc.2015.07.016
---------- CHICAGO ----------
Astié, A.A., Scardamaglia, R.C., Muzio, R.N., Reboreda, J.C. "Sex differences in retention after a visual or a spatial discrimination learning task in brood parasitic shiny cowbirds" . Behavioural Processes 119 (2015) : 99-104.
http://dx.doi.org/10.1016/j.beproc.2015.07.016
---------- MLA ----------
Astié, A.A., Scardamaglia, R.C., Muzio, R.N., Reboreda, J.C. "Sex differences in retention after a visual or a spatial discrimination learning task in brood parasitic shiny cowbirds" . Behavioural Processes, vol. 119, 2015, pp. 99-104.
http://dx.doi.org/10.1016/j.beproc.2015.07.016
---------- VANCOUVER ----------
Astié, A.A., Scardamaglia, R.C., Muzio, R.N., Reboreda, J.C. Sex differences in retention after a visual or a spatial discrimination learning task in brood parasitic shiny cowbirds. Behav. Processes. 2015;119:99-104.
http://dx.doi.org/10.1016/j.beproc.2015.07.016