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Abstract:

Avian brain plasticity has been demonstrated by seasonal variations in neuroanatomy correlated with changes in singing and hoarding behaviour. We report a new instance of plasticity. Brood parasitism in South American cowbirds involves memory for location of hosts' nests, and is associated with an enlarged hippocampus relative to telencephalon size. This effect holds between sexes and species during the breeding season. We report that for two parasitic species, relative hippocampal volume is smaller during the non-breeding than the breeding season, and that sexual dimorphism present in summer in one of the species is not found in winter. These results support the hypothesis that the avian hippocampal formation shows neuroanatomical plasticity associated with seasonal changes in spatial memory demands.

Registro:

Documento: Artículo
Título:Seasonal changes of hippocampus volume in parasitic cowbirds
Autor:Clayton, N.S.; Reboreda, J.C.; Kacelnik, A.
Filiación:Section of Neurobiology, Physiol. Behav., Briggs Hall, U., Davis, CA 95616, United States
Inst. de Biol. y Med. Exp.-CONICET, Vuelta de Obligado 2490, 1428 Buenos Aires, Argentina
Department of Zoology, University of Oxford, South Parks Road, Oxford OX1 3PS, United Kingdom
Palabras clave:Brood parasitism; Cowbirds; Hippocampus; Seasonal differences; Spatial memory; animal experiment; article; behavior; bird; brain size; controlled study; female; hippocampus; male; nonhuman; parasitism; plasticity; seasonal variation; spatial memory
Año:1997
Volumen:41
Número:3
Página de inicio:237
Página de fin:243
DOI: http://dx.doi.org/10.1016/S0376-6357(97)00050-8
Título revista:Behavioural Processes
Título revista abreviado:BEHAV. PROCESSES
ISSN:03766357
CODEN:BPROD
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03766357_v41_n3_p237_Clayton

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Citas:

---------- APA ----------
Clayton, N.S., Reboreda, J.C. & Kacelnik, A. (1997) . Seasonal changes of hippocampus volume in parasitic cowbirds. Behavioural Processes, 41(3), 237-243.
http://dx.doi.org/10.1016/S0376-6357(97)00050-8
---------- CHICAGO ----------
Clayton, N.S., Reboreda, J.C., Kacelnik, A. "Seasonal changes of hippocampus volume in parasitic cowbirds" . Behavioural Processes 41, no. 3 (1997) : 237-243.
http://dx.doi.org/10.1016/S0376-6357(97)00050-8
---------- MLA ----------
Clayton, N.S., Reboreda, J.C., Kacelnik, A. "Seasonal changes of hippocampus volume in parasitic cowbirds" . Behavioural Processes, vol. 41, no. 3, 1997, pp. 237-243.
http://dx.doi.org/10.1016/S0376-6357(97)00050-8
---------- VANCOUVER ----------
Clayton, N.S., Reboreda, J.C., Kacelnik, A. Seasonal changes of hippocampus volume in parasitic cowbirds. BEHAV. PROCESSES. 1997;41(3):237-243.
http://dx.doi.org/10.1016/S0376-6357(97)00050-8