Document Detail

Fear of humans and its relationships with productivity in laying hens at commercial farms.
MedLine Citation:
PMID:  1393665     Owner:  NLM     Status:  MEDLINE    
1. The relationship between the behavioural responses of laying hens to humans and productivity was determined at 16 commercial sheds from 14 farms. 2. A number of behaviour variables were moderately to highly correlated with production variables; for example, the proportion of birds that moved away from an approaching experimenter in an unfamiliar environment ('shute test') was negatively correlated with peak hen day production, (PKHDP). 3. Behavioural responses to humans accounted for between 23 and 63% of the variation in a number of production variables, including PKHDP and the duration of a high level of production. 4. Inclusion of farm factor variables increased the amount of variation accounted for by the behaviour variables. For example, adding the variable 'time/day spent in the shed by stockpeople' to the behaviour variables 'the proportion of birds that moved away from an approaching human' in the shute test and 'the number of times birds in cages adopted an erect posture' in response to an approaching human increased the variation accounted for in PKHDP from 53 to 61%. 5. The results suggest that fear of humans may be a factor that limits the productivity of commercial laying hens.
J L Barnett; P H Hemsworth; E A Newman
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  British poultry science     Volume:  33     ISSN:  0007-1668     ISO Abbreviation:  Br. Poult. Sci.     Publication Date:  1992 Sep 
Date Detail:
Created Date:  1992-11-17     Completed Date:  1992-11-17     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  15740290R     Medline TA:  Br Poult Sci     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  699-710     Citation Subset:  IM    
Victorian Institute of Animal Science, Department of Food and Agriculture, Werribee, Australia.
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MeSH Terms
Chickens / physiology*
Fear / physiology*
Ovulation / psychology*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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