Effects of nutritional stress during different developmental periods on song and the hypothalamic–pituitary–adrenal axis in zebra finches
| Autor: | Haruka Wada, Kim L. Schmidt, Kiran K. Soma, Buddhamas Kriengwatana, Matthew D. Taves, Scott A. MacDougall-Shackleton |
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| Rok vydání: | 2014 |
| Předmět: |
Male
Hypothalamo-Hypophyseal System endocrine system medicine.medical_specialty Pituitary-Adrenal System Adrenocorticotropic hormone Dexamethasone Random Allocation Behavioral Neuroscience chemistry.chemical_compound Endocrinology Adrenocorticotropic Hormone Stress Physiological Corticosterone Internal medicine Stress (linguistics) medicine Animals Learning Juvenile Glucocorticoids Developmental stage biology Endocrine and Autonomic Systems Age Factors biology.organism_classification medicine.anatomical_structure nervous system chemistry Animal Nutritional Physiological Phenomena Female Finches Vocalization Animal Psychology hormones hormone substitutes and hormone antagonists Taeniopygia Hypothalamic–pituitary–adrenal axis medicine.drug |
| Zdroj: | Hormones and Behavior. 65:285-293 |
| ISSN: | 0018-506X |
| DOI: | 10.1016/j.yhbeh.2013.12.013 |
| Popis: | 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 CORT 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. |
| Databáze: | OpenAIRE |
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