Document Detail

Factors affecting ranging behaviour in young and adult laying hens.
MedLine Citation:
PMID:  24571397     Owner:  NLM     Status:  Publisher    
Abstract 1. A study was conducted to investigate the effect of environment on ranging in 33 flocks reared with (16) or without (17) range access. Ranging was observed at 8, 16 and 35 weeks. Information on house lay-out, weather conditions and range characteristics was used to create models predicting the percentage of the flock out on the range and the percentage of ranging birds observed away from the house. 2. Three flocks had range access at eight weeks. The percentage of birds ranging averaged 28%, with 22% of these ranging away from the house. For the 13 flocks with range access at 16 weeks, the percentage of pullets on the range was 12%, with 29% of these ranging away from the house. At 35 weeks, all flocks had range access and the average percentage of birds out on the range was 13%, with 42% of these ranging away from the house. 3. The percentage of birds seen using the range was higher with reduced flock size and stocking density, increased pop hole availability (cm/bird) and light intensity inside the house. More birds ranged on cooler days and on farms located in areas with fewer days of rain per year and lower average rainfall. Ranging depended on season, which was lowest in May. More birds ranged away from the house when cover and more artificial structures were present on the range. Ranging increased further with lower humidity levels and higher air pressure on the range and on warmer days. Lastly, birds ranged away from the house more as they got older.
A-M Gilani; T G Knowles; C J Nicol
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2014-2-27
Journal Detail:
Title:  British poultry science     Volume:  -     ISSN:  1466-1799     ISO Abbreviation:  Br. Poult. Sci.     Publication Date:  2014 Feb 
Date Detail:
Created Date:  2014-2-27     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  15740290R     Medline TA:  Br Poult Sci     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
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