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Influence des jeunes sur le comportement maternel et conséquences développementales chez la caille japonaise (Coturnix c. japonica)

Abstract : The behavioural development of the individual is particularly sensitive to early social influences. The mother, as a privileged partner of the young from the birth, plays a primordial role in their survival and their development. In the precocial bird, although it is well established that maternal behavior varies according to the mother's personal characteristics, the role of the young in these variations and the consequences on their development remain unknown. In the Japanese quail (Coturnix coturnix japonica), we were initially interested in the influence of a relatedness between the mother and all her chicks. We showed that this factor did not induce any variation in its maternal behaviour, allowing us to place the hypothese of a weak parental selectivity in this species. We showed that, on the other hand, a change in the chicks’ behaviour following a modification of the prenatal environment improved the maternal behaviour, decreasing maternal aggressivity. We then demonstrated that a greater number of chicks induced an improvement of the first interactions but induced an emancipatory rejection earlier by the mother. Finally, we explored the influence of the sexual brood composition. It appears that mothers were more involved in their male chicks but that it was dependent on the sex of the other members of the brood. All of our work shows that these variations in maternal behaviour have a sure influence on the behavioural development of chicks whose sex determines their sensitivity to different maternal traits.
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Submitted on : Monday, December 4, 2017 - 9:11:55 AM
Last modification on : Thursday, October 1, 2020 - 3:31:49 AM

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  • HAL Id : tel-02790238, version 2
  • PRODINRA : 440842

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Nadège Aigueperse. Influence des jeunes sur le comportement maternel et conséquences développementales chez la caille japonaise (Coturnix c. japonica). Sciences agricoles. Université Rennes 1, 2017. Français. ⟨NNT : 2017REN1B004⟩. ⟨tel-02790238v2⟩

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