Incubation temperature affects the expression of young precocial birds’ fear-related behaviours and neuroendocrine correlates
2018
Bertin, Aline | Calandreau, Ludovic | Meurisse, Maryse | Georgelin, Marion | Palme, Rupert | Lumineau, Sophie | Houdelier, Cécilia | Darmaillacq, Anne-Sophie | Dickel, Ludovic | Colson, Violaine | Cornilleau, Fabien | Rat, Christophe | Delaveau, Joël | Arnould, Cécile | Physiologie de la reproduction et des comportements [Nouzilly] (PRC) ; Institut National de la Recherche Agronomique (INRA)-Institut Français du Cheval et de l'Equitation [Saumur] (IFCE)-Université de Tours (UT)-Centre National de la Recherche Scientifique (CNRS) | University of Veterinary Medicine [Vienna] (Vetmeduni) | Ethologie animale et humaine (EthoS) ; Université de Caen Normandie (UNICAEN) ; Normandie Université (NU)-Normandie Université (NU)-Université de Rennes (UR)-Centre National de la Recherche Scientifique (CNRS) | Laboratoire de Physiologie et Génomique des Poissons (LPGP) ; Institut National de la Recherche Agronomique (INRA)-Structure Fédérative de Recherche en Biologie et Santé de Rennes (Biosit : Biologie - Santé - Innovation Technologique) | Pôle d'Expérimentation Avicole de Tours (UE PEAT) ; Institut National de la Recherche Agronomique (INRA) | ANR-13-BSV7-0002-02 - PReSTO'Cog | ANR-13-BSV7-0002,PReSTO'Cog,Effets de stress prénatals sur le développement précoce des comportements et des capacités cognitives : une approche comparative(2013)
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显示更多 [+] 显示较少 [-]英语. The influence of embryonic microclimate on the behavioural development of birds remains unexplored. In this study, we experimentally tested whether chronic exposure to suboptimal temperatures engendered plasticity in the expression of fear-related behaviours and in the expression of the corticotropin-releasing factor in the brains of domestic chicks (Gallus g. domesticus). We compared the neurobehavioural phenotypes of a control group of chicks incubated in an optimal thermal environment (37.8 °C) with those of a group of experimental chicks exposed chronically in ovo to suboptimal temperatures (27.2 °C for 1 hour twice a day). Chronic exposure to a suboptimal temperature delayed hatching and decreased growth rate and experimental chicks had higher neophobic responses than controls in novel food and novel environment tests. In addition, experimental chicks showed higher expression of corticotropin-releasing factor than did controls in nuclei of the amygdala, a structure involved in the regulation of fear-related behaviours. In this study, we report the first evidence of the strong but underappreciated role of incubation microclimate on the development of birds’ behaviour and its neurobiological correlates.
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