Circadian chronotypes among wild-captured west Andean octodontids

Rest activity pattern was studied in wild-captured males of Octodon degus (n=9), Octodon bridgesi (n=3), and Spalacopus cyanus (n=6) (Rodentia: Octodontidae). Ten-minute resolution actograms were constructed from data obtained by an automated acquisition system. After two months of habituation to a...

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Autores principales:	OCAMPO-GARCÉS,ADRIÁN, MENA,WILSON, HERNÁNDEZ,FELIPE, CORTÉS,NELSON, PALACIOS,ADRIÁN G
Lenguaje:	English
Publicado:	Sociedad de Biología de Chile 2006
Materias:	circadian rhythms chronotype Octodon octodontids Spalacopus cyanus
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602006000200003
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spelling	oai:scielo:S0716-976020060002000032006-07-25Circadian chronotypes among wild-captured west Andean octodontidsOCAMPO-GARCÉS,ADRIÁNMENA,WILSONHERNÁNDEZ,FELIPECORTÉS,NELSONPALACIOS,ADRIÁN G circadian rhythms chronotype Octodon octodontids Spalacopus cyanus Rest activity pattern was studied in wild-captured males of Octodon degus (n=9), Octodon bridgesi (n=3), and Spalacopus cyanus (n=6) (Rodentia: Octodontidae). Ten-minute resolution actograms were constructed from data obtained by an automated acquisition system. After two months of habituation to a stable light-dark schedule, recordings were performed in isolation chambers under a 12: 12 Light Dark schedule. A free-running period (constant darkness) was recorded for O. bridgesi and S. cyanus. O. degus displayed a crepuscular pattern of rest activity rhythm. Entrained O. bridgesi and S. cyanus displayed nocturnal preference, with rest anticipating light phase and without crepuscular activity bouts. Under constant darkness, active phase occurred at subjective night in O. bridgesi and S. cyanus. Wild-captured O. bridgesi and S. cyanus possess a circadian driven nocturnal preference, while wild O. degus displays a crepuscular profile. Diurnal active phase preference of wild S. cyanus colonies observed in the field could not be explained solely by photic entrainment, since social and/or masking processes appear to be operative. The genus Octodon includes species with diverse chronotypes. We propose that crepuscular diurnal pattern observed in O. degus is a recent acquisition among the octodontid lineageinfo:eu-repo/semantics/openAccessSociedad de Biología de ChileBiological Research v.39 n.2 20062006-01-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602006000200003en10.4067/S0716-97602006000200003
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	circadian rhythms chronotype Octodon octodontids Spalacopus cyanus
spellingShingle	circadian rhythms chronotype Octodon octodontids Spalacopus cyanus OCAMPO-GARCÉS,ADRIÁN MENA,WILSON HERNÁNDEZ,FELIPE CORTÉS,NELSON PALACIOS,ADRIÁN G Circadian chronotypes among wild-captured west Andean octodontids
description	Rest activity pattern was studied in wild-captured males of Octodon degus (n=9), Octodon bridgesi (n=3), and Spalacopus cyanus (n=6) (Rodentia: Octodontidae). Ten-minute resolution actograms were constructed from data obtained by an automated acquisition system. After two months of habituation to a stable light-dark schedule, recordings were performed in isolation chambers under a 12: 12 Light Dark schedule. A free-running period (constant darkness) was recorded for O. bridgesi and S. cyanus. O. degus displayed a crepuscular pattern of rest activity rhythm. Entrained O. bridgesi and S. cyanus displayed nocturnal preference, with rest anticipating light phase and without crepuscular activity bouts. Under constant darkness, active phase occurred at subjective night in O. bridgesi and S. cyanus. Wild-captured O. bridgesi and S. cyanus possess a circadian driven nocturnal preference, while wild O. degus displays a crepuscular profile. Diurnal active phase preference of wild S. cyanus colonies observed in the field could not be explained solely by photic entrainment, since social and/or masking processes appear to be operative. The genus Octodon includes species with diverse chronotypes. We propose that crepuscular diurnal pattern observed in O. degus is a recent acquisition among the octodontid lineage
author	OCAMPO-GARCÉS,ADRIÁN MENA,WILSON HERNÁNDEZ,FELIPE CORTÉS,NELSON PALACIOS,ADRIÁN G
author_facet	OCAMPO-GARCÉS,ADRIÁN MENA,WILSON HERNÁNDEZ,FELIPE CORTÉS,NELSON PALACIOS,ADRIÁN G
author_sort	OCAMPO-GARCÉS,ADRIÁN
title	Circadian chronotypes among wild-captured west Andean octodontids
title_short	Circadian chronotypes among wild-captured west Andean octodontids
title_full	Circadian chronotypes among wild-captured west Andean octodontids
title_fullStr	Circadian chronotypes among wild-captured west Andean octodontids
title_full_unstemmed	Circadian chronotypes among wild-captured west Andean octodontids
title_sort	circadian chronotypes among wild-captured west andean octodontids
publisher	Sociedad de Biología de Chile
publishDate	2006
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602006000200003
work_keys_str_mv	AT ocampogarcesadrian circadianchronotypesamongwildcapturedwestandeanoctodontids AT menawilson circadianchronotypesamongwildcapturedwestandeanoctodontids AT hernandezfelipe circadianchronotypesamongwildcapturedwestandeanoctodontids AT cortesnelson circadianchronotypesamongwildcapturedwestandeanoctodontids AT palaciosadriang circadianchronotypesamongwildcapturedwestandeanoctodontids
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Circadian chronotypes among wild-captured west Andean octodontids

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