dc:title
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Epigenetic maternal effects on endogenous rhythms in precocial birds |
dc:creator
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Formanek, L. |
dc:creator
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Richard-Yris, M.-A. |
dc:creator
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Houdelier, C. |
dc:creator
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Lumineau, S. |
dc:subject
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maternal influence |
dc:subject
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development |
dc:subject
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circadian rhythm |
dc:subject
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ultradian rhythm |
dc:subject
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Japanese quail |
dc:description
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Development involves interactions between genetic constraints and environmental influences. Vertebrate mothers are generally the first individuals young animals encounter and interact with. Thus, their role is primordial during ontogeny. The present study evaluated non-genomic effects of mothers on the development of rhythms of precocial Japanese quail (Coturnix c. japonica). First, we investigated the influence of mothering on the ontogeny of endogenous rhythms of young. We compared circadian and ultradian rhythms of feeding activity of quail reared with or without adoptive mothers. More brooded than non-brooded quail presented a circadian rhythm and/or an ultradian rhythm. Thus, mothers’ presence during the normal brooding period favours, in the long term, the expression of rhythms in their young. Second, we investigated the influence of mothers’ rhythmic phenotype on the development of the endogenous rhythms of young by comparing quail brooded by circadian-rhythmic adoptive mothers (R) to quail brooded by circadian-arrhythmic adoptive mothers (A). More R-brooded than A-brooded quail expressed a circadian rhythm. Circadian rhythm clarities were greater in R-brooded quail than in A-brooded quail. Ultradian rhythmicity differed neither between R and A-brooded quail nor between R and A adoptive mothers. Thus, the rhythmic phenotypes of quail mothers influence the rhythmic phenotypes of their young. Our results demonstrate that mothers of precocial birds influence epigenetically the endogenous rhythms ontogeny of the young they raise. |
dc:publisher
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Taylor & Francis |
dc:contributor
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EthoS, UMR 6552 |
dc:contributor
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CNRS |
dc:contributor
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Université de Rennes 1 |
dc:date
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2009 |
dc:type
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Article scientifique |
dc:format
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dc:identifier
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Chronobiology International, 2009, 26, 396-414
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dc:language
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dc:rights
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