Endocrine Responses of White-Crowned Sparrows to Environmental Stress

@article{Wingfield1982EndocrineRO,
  title={Endocrine Responses of White-Crowned Sparrows to Environmental Stress},
  author={John C. Wingfield and Jan P. Smith and Donald Sankey Farner},
  journal={The Condor},
  year={1982},
  volume={84},
  pages={399-409}
}
--Field and laboratory investigations were conducted to assess the effects of selected stressors on White-crowned Sparrows (Zonotrichia leucophrys gambelii and Z. 1. pugetensis). Within a few minutes after capture during the nonbreeding winter phase, the birds' plasma corticosterone increased, whereas their already low levels of luteinizing hormone (LH) and dihydrotesterone (DHT) declined further. In contrast, in the summer, or breeding phase, corticosterone levels increased much more slowly… 

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References

SHOWING 1-10 OF 57 REFERENCES
The Endocrinology of a Natural Breeding Population of the White-Crowned Sparrow (Zonotrichia leucophrys pugetensis)
The levels of immunoreactive luteinizing hormone (irLH), testosterone, dihydrotestosterone (DHT), estradiol, estrone, and corticosterone have been measured through the course of the breeding season
Effects of gonadal hormones on the blood composition of white-crowned sparrows.
A Field Study of Social Dominance, Plasma Levels of Luteinizing Hormone and Steroid Hormones in Wintering Harris' Sparrows
TLDR
There was no correlation between dominance status and testosterone, even when significant weather effects were statistically controlled, or between dominance and LH, for which there were no significant effects of weather.
Influence of stress on the secretion of corticosterone in the duck (Anas platyrhynchos).
TLDR
The results have demonstrated the lability of the secretion of corticosterone in response to stress and demonstrated its usefulness as a physiological indicator of stress in ducks.
Some physiological responses of turkeys selected for high and low adrenal response to cold stress.
TLDR
The response toACTH injections strongly suggests that genetic selection altered the adrenal response to ACTH, and it appears that the response to cold stress is negatively correlated with resistance to Mycoplasma meleagridis.
Stress and increase of the corticosterone level prevent imprinting in ducklings.
TLDR
A prior study stated that age increasing within a period of 12 to 28 hrs after hatching the Corticosterone level in blood increases and this increase of hormones were one of the factors limiting the sensitive period.
...
1
2
3
4
5
...