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The effect of transfer stress on fecal corticosterone concentration in Collared-Scope Owls
|關鍵字:||corticosterone;皮質酮;avian;feces;non-invsive technique;stress of transfer;禽類;糞便;非侵入性技術;移籠緊迫||出版社:||獸醫學系暨研究所||引用:||1. 張耿瑞。台灣黑熊糞中繁殖類固醇年週期變動之研究。碩士論文，國立中興大學，台中，台灣，2004。 2. 蘇品源。氣相層析質譜法測定不同代謝性壓力狀態下老鼠血液中皮質固醇酮的濃度。碩士論文，國立台灣師範大學，台北，台灣，2002。 3. Carere C, Groothuis TGG, Mostl E, Daan S, and Koolhaas JM. Fecal corticosteroids in a territorial bird selected for different personalities: daily rhythm and the response to social stress. Horm Behave 43: 540-548, 2003. 4. Dehnhard M, Schreer A, Krone O, Jewgenow K, Krause M. and Grossmann R.. Measurement of plasma corticosterone and fecal glucocorticoid metabolites in the chicken, the great cormorant, and the goshawk. Gen Comp Endocrinol 131: 345-352, 2003. 5. Frigerio D, Dittami J, Mostl E, Kotrschal K. Excreted corticosterone metabolites co-vary with air temperature and air pressure in male greylag geese (Anser anser). Gen Comp Endocrinol 137: 29-36, 2004. 6. Goymann W. Noninvasive monitoring of hormones in bird droppings: physiological validations, sampling, extraction, sex differences, and the influence of diet on hormone metabolite levels. Ann N Y Acad Sci 1046: 35-53, 2005. 7. Hirschenhauser K, Möstl E, and Kotrschal K. Seasonal Patterns of Sex Steroids Determined from Feces in Different Social Categories of Greylag Geese (Anser anser). Gen Comp endocrinol 14: 67-79, 1999. 8. Kitaysky AS, Kitaiskaia EV, Wingfield JC, Piatt JF. Dietary restriction causes chronic elevation of corticosterone and enhances stress response in red-legged kittiwake chicks. J Comp Physiol B 171:701-709, 2001. 9. Wasser SK, Bevis K, King G and Hanson E. Noninvasive Physiological Measures of Disturbance in the Northern Spotted Owl. Conserv biol 11(4): 1019-1022, 1997. 10. Wasser SK and Hunt KE. Noninvasive Measures of Reproductive Function and Disturbance in the Barred Owl, Great Horned Owl, and Northern Spotted Owl. Ann N Y Acad Sci 1046: 109-137, 2005.||摘要:||
The corticosterone is secreted from adrenal and controlled by hypothalamic- pituitary-adrenal axis (HPA axis) in respond to environmental stressor and emotional arousal. Therefore, it was called the “stress hormones”. The measurement of fecal corticosterone was a non-invsive technique and become a demonstration tool for assessing environmental stress or other pressure in wild animals. In this study, fourteen collared- scope owls (body size 23-25 cm, body weight 164-188 g), which caged all-together for more than six months, were separated into different cages. The fecal samples were collected randomly before transfer and in the 1st, 2nd, 3rd, 4th, 6th, 8th, 10th, 14th, 17th, and 21th days after owls' separation. Fecal corticosterone concentration was measured by EIA. The results showed that an acute rise in fecal corticosterone concentration appeared on the four days after separation. The concentration of corticosterone, however, decreased gradually to baseline level, the mean concentration before transfer, in the period on 8th day, the fecal corticosterone concentration of some individuals were lower than to baseline levels. Three phases were defined according to the fecal corticosterone concentration. Phase Ⅰ: From the 1st to the 4th day after separation, a peak of corticosterone concentration in feces indicates a stress effect of handing, examine, and change of environment in this phase. PhaseⅡ: From the 4th to the 8th day after separation, after the fecal corticosterone concentration decreased gradually to a baseline level indicates the stress effect diminished in this phase. PhaseⅢ: From the 8th to the 21th day after separation, the mean concentration of fecal corticosterone maintained in only 1/3 of baseline levels. We suggested that a feedback effect of HPA axis resulted in the fecal corticosterone concentration. The collared-scope owls needed 8 to 10 days to adapt to a new environment. Our results showed that the noninvasive method by assessing fecal corticosterone concentration was a suitable technique to evaluate the stress effect of transfer in collared-scope owls.
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