Abstract:
:Feather pecking in domestic fowl is a behavioral abnormality that consists of mild or injurious pecking at feathers of conspecifics. Previously, it was shown that chicks from a high feather-pecking (HFP) and low feather-pecking (LFP) line of laying hens already differ in their propensity to feather peck at 14 and 28 days of age. As a first step in investigating a possible relationship between the development of feather pecking and physiological and neurobiological characteristics of laying hens, two subsequent experiments were carried out. Firstly, we investigated the development of adrenocortical (re)activity in HFP and LFP chicks during the first 8 weeks of life. Secondly, we studied dopamine (DA) and serotonin (5-HT) turnover in the brain of 28-day-old HFP and LFP chicks. In both experiments, chicks were exposed to manual restraint (placing the chicks on its side for 5 min). Plasma corticosterone levels were lower (baseline on Days 3 and 56; restraint-induced on Days 3, 14 and 28) in HFP chicks. Both brain DA and 5-HT turnover were lower in the HFP chicks, as well. Possible consequences for the observed differences in (stress) physiology and neurobiology between the two lines in relation to the feather pecking are discussed.
journal_name
Physiol Behavjournal_title
Physiology & behaviorauthors
van Hierden YM,Korte SM,Ruesink EW,van Reenen CG,Engel B,Korte-Bouws GA,Koolhaas JM,Blokhuis HJdoi
10.1016/s0031-9384(02)00667-4subject
Has Abstractpub_date
2002-04-15 00:00:00pages
653-9issue
5eissn
0031-9384issn
1873-507Xpii
S0031938402006674journal_volume
75pub_type
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