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Maternal Diet Influences Offspring Feeding Behavior and Fearfulness in Birds


Bird embryos are known to perceive and memorize chemosensory signals of the surrounding environment; however, the potential impact of the maternal diet has not previously been investigated. We hypothesized that bird embryos memorize the chemical signals of the maternal diet and that this perceptual learning may orient subsequent feeding behavior of the hatchlings. We fed laying hens standard food enriched with 2% menhaden oil (MH group) or 2% soybean oil (controls). The scent of menhaden was significantly more detected in MH egg yolks than in control yolks by a human panel. We analyzed the development and behavior of offspring towards different types of food, bearing or not bearing the menhaden scent. In a 3-min choice test with unfamiliar food (mashed cereals) MH chicks showed a clear positive orientation toward the unfamiliar food bearing the menhaden scent. By contrast, control chicks showed a preference for the non-odorized unfamiliar food. MH chicks expressed higher emotional reactivity level than control chicks as expressed by food neophobia and longer immobility in a restraint test. Chicks exposed in ovo to menhaden oil via the maternal diet preferentially oriented their feeding behavior towards food containing menhaden oil, but only when the food was unfamiliar. We propose that oil in the maternal diet engenders maternal effects and contributes to the development of behavioral phenotype in the offspring. In ovo chemosensory learning may have evolved to prepare precocial offspring for their environment. This suggests a common principle of embryonic chemosensory learning across vertebrate taxa.
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hal-01308727 , version 1 (28-04-2016)


  • HAL Id : hal-01308727 , version 1
  • PRODINRA : 312149


Aline Bertin, Nadège Aigueperse, Ludovic Calandreau. Maternal Diet Influences Offspring Feeding Behavior and Fearfulness in Birds. 48th Annual International Society for Developmental Psychobiology, Jul 2015, San Sebastian, Spain. ⟨hal-01308727⟩


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