Korte S M, Ruesink W, Blokhuis H J
Institute for Animal Science and Health (ID-DLO), Lelystad, The Netherlands.
Physiol Behav. 1999;65(4-5):649-52. doi: 10.1016/s0031-9384(98)00206-6.
The purpose of this investigation was to determine whether there is a difference in coping style in chicks from a high (HFP)- and low-feather pecking (HFP) line of laying hens. Active and passive coping styles can be distinguished by differences in sympathetic and parasympathetic activities on the heart. We studied heart rate during baseline conditions and during manual restraint in HFP and LFP hens. Heart rate and locomotor activity were successfully monitored around the clock with a biotelemetric implant. During the light period, the values for locomotor activity and heart rate were highest, whereas during the dark period they were the lowest. These values did not differ in LFP and HFP hens. However, during manual restraint (restraining the bird on its side by hand for 8 min) HFP birds had somewhat faster heart rate than LFP birds (at 4 min, p = 0.066). Studying heart rate variability during manual restraint showed that LFP chickens had a significant higher parasympathetic activity at 5 min (p = 0.023) and at 6 min (p = 0.002) as compared to HFP hens. The results showed that in terms of coping style, LFP chickens are passive, whereas HFP birds are active.
本研究的目的是确定来自高产蛋量（HFP）品系和低啄羽（LFP）品系蛋鸡的雏鸡在应对方式上是否存在差异。主动和被动应对方式可通过心脏交感神经和副交感神经活动的差异来区分。我们研究了HFP和LFP母鸡在基线条件下以及人工约束期间的心率。通过生物遥测植入物成功地全天候监测了心率和运动活动。在光照期间，运动活动和心率值最高，而在黑暗期间则最低。这些值在LFP和HFP母鸡中没有差异。然而，在人工约束期间（将鸡侧卧手动约束8分钟），HFP鸡的心率比LFP鸡稍快（在4分钟时，p = 0.066）。研究人工约束期间的心率变异性表明，与HFP母鸡相比，LFP鸡在5分钟（p = 0.023）和6分钟（p = 0.002）时副交感神经活动显著更高。结果表明，在应对方式方面，LFP鸡是被动的，而HFP鸡是主动的。
