Plasma corticosterone responses to handling in Japanese quail selected for low or high plasma corticosterone responses to brief restraint

被引:28
作者
Cockrem, J. F. [1 ]
Candy, E. J. [1 ]
Castille, S. A. [2 ]
Satterlee, D. G. [2 ]
机构
[1] Massey Univ, Conservat Endocrinol Res Grp, Inst Vet Anim & Biomed Sci, Palmerston North, New Zealand
[2] Louisiana State Univ, Sch Anim Sci, Ctr Agr, Baton Rouge, LA 70803 USA
关键词
OPEN-FIELD BEHAVIOR; ADRENOCORTICAL RESPONSIVENESS; CLOACAL GLAND; STRESS; FEAR; WEIGHT; CHICKS; GROWTH;
D O I
10.1080/00071668.2010.503637
中图分类号
S8 [畜牧、 动物医学、狩猎、蚕、蜂];
学科分类号
0905 ;
摘要
1. Plasma corticosterone responses to handling in Japanese quail selected for low or high corticosterone responses to brief mechanical restraint (low and high stress lines) were measured in this study. 2. Initial corticosterone concentrations did not differ between the two lines. Corticosterone concentrations increased 15 min after handling began in quail handled for 5 or 15 min, with greater increases in quail from the high stress than the low stress line. Integrated corticosterone responses were higher in high stress than low stress quail, although the difference between the lines was not significant in quail handled for 5 min. 3. Patterns of plasma corticosterone after 15 min differed between quail handled for 5 or 15 min. Corticosterone increased further or did not change from 15 to 30 min then decreased from 30 to 60 min in quail handled for 5 min, whereas corticosterone decreased from 15 to 30 min then did not change in quail handled for 15 min. Corticosterone concentrations at 60 min remained elevated above initial concentrations, and were similar in quail handled for 5 or 15 min. Corticosterone concentrations at 15 min were more than twice as high in quail handled for 15 min compared with quail handled for 5 min. 4. Although the lines of quail have been selected on the magnitude of corticosterone responses, there was still marked variation in responses between birds within each line. Some quail in the high stress line showed little or no corticosterone response to handling, whilst large responses were seen in some birds of the low stress line. The lines of quail differ in characteristics other than corticosterone responses, including fear behaviour and reproductive development, so the lines provide valuable opportunities to investigate the potential significance of differences between individual birds in their corticosterone responses.
引用
收藏
页码:453 / 459
页数:7
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