ZGIRSKI, Thomas; LEGAGNEUX, Pierre; CHASTEL, Olivier; REGIMBALD, Lyette; PROUTEAU, Louise; LE POGAM, Audrey; BUDZINSKI, Hélène; LOVE, Oliver; VÉZINA, François

doi:10.1038/s41598-021-93894-2

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ZGIRSKI, Thomas
Université du Québec à Rimouski (UQAR), Rimouski, QC, G5L 3A1, Canada
Centre de la Science de la Biodiversité du Québec (QCBS), Montréal, QC, Canada

LEGAGNEUX, Pierre
Centre de la Science de la Biodiversité du Québec (QCBS), Montréal, QC, Canada
Université Laval, Quebec, QC, G1V 0A6, Canada
Centre d'Études Biologiques de Chizé - UMR 7372 [CEBC]
Centre d'Etudes Nordiques [CEN]

CHASTEL, Olivier
Centre d'Études Biologiques de Chizé - UMR 7372 [CEBC]

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Scientific Reports. 2021-12, vol. 11, n° 1

Résumé en anglais

Neonicotinoids are insecticides widely used as seed treatments that appear to have multiple negative effects on birds at a diversity of biological scales. Adult birds exposed to a low dose of imidacloprid, one of the most commonly used neonicotinoids, presented reduced fat stores, delayed migration and potentially altered orientation. However, little is known on the effect of imidacloprid on birds growth rate despite studies that have documented disruptive effects of low imidacloprid doses on thyroid gland communication. We performed a 2×2 factorial design experiment in Zebra finches, in which nestling birds were exposed to a very low dose (0.205 mg kg body mass−1) of imidacloprid combined with food restriction during posthatch development. During the early developmental period, imidacloprid exposure resulted in an improvement of body condition index in treated nestlings relative to controls. Imidacloprid also led to compensatory growth in food restricted nestlings. This early life neonicotinoid exposure also carried over to adult age, with exposed birds showing higher lean mass and basal metabolic rate than controls at ages of 90–800 days. This study presents the first evidence that very low-dose neonicotinoid exposure during early life can permanently alter adult phenotype in birds.< Réduire

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Growth disorders

Ecophysiology

Metabolism

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Early life neonicotinoid exposure results in proximal benefits and ultimate carryover effects

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