期刊
HORMONES AND BEHAVIOR
卷 65, 期 3, 页码 285-293出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.yhbeh.2013.12.013
关键词
Corticosterone; Avian; Vocal performance; Developmental stress hypothesis; Song learning; HPA; Dexamethasone; Adrenocorticotropic hormone; Juvenile
资金
- NSERC Discovery Grant
In songbirds, developmental stress affects song learning and production. Altered hypothalamic-pituitary-adrenal (HPA) axis function resulting in elevated corticosterone (CORT) may contribute to this effect. We examined whether developmental conditions affected the association between adult song and HPA axis function, and whether nutritional stress before and after nutritional independence has distinct effects on song learning and/or vocal performance. Zebra finches (Taeniopygia guttata) were raised in consistently high (HH) or low (LL) food conditions until post-hatch day (PHD) 62, or were switched from high to low conditions (HL) or vice versa (LH) at PHD 34. Song was recorded in adulthood. We assessed the response of CORT to handling during development and to dexamethasone (DEX) and adrenocorticotropic hormone (ACTH) challenges during adulthood. Song learning and vocal performance were not affected by nutritional stress at either developmental stage. Nutritional stress elevated baseline CORT during development. Nutritional stress also increased rate of CORT secretion in birds that experienced stress only in the juvenile phase (HL group). Birds in the LL group had lower CURT levels after injection of ACTH compared to the other groups, however there was no effect of nutritional stress on the response to DEX Thus, our findings indicate that developmental stress can affect HPA function without concurrently affecting song. (C) 2014 Elsevier Inc. All rights reserved.
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