Document Detail

Stocking density effects on male broilers grown to 1.8 kilograms of body weight.
MedLine Citation:
PMID:  16523637     Owner:  NLM     Status:  MEDLINE    
This study examined the effects of stocking density on live performance, physiological stress level indicators, and processing yields of male broilers grown to 1.8 kg. A total of 3,120 Ross x Ross 708 male chicks was placed into 32 floor pens (5.57 m2/pen). Stocking density treatments were 25, (75 birds/pen), 30 (90 birds/ pen), 35 (105 birds/pen), and 40 (120 birds/pen) kg of BW/m2. The BW gain, feed consumption, and feed conversion were adversely affected with increasing stocking densities by 35 d. Physiological stress indicators (plasma corticosterone, glucose, cholesterol, total nitrites, and heterophil:lymphocyte) were not affected. Litter moisture was higher as stocking density increased, which led to higher footpad lesion scores. In parallel to growth responses, carcass weight was depressed by increasing stocking density, but carcass yield, absolute and relative amounts of abdominal fat, and carcass skin defects were not affected. Increasing stocking density decreased breast fillet weight and its relative yield and breast tender weight, but not breast tender yield. As calculated stocking density increased 5 kg of BW/m2 beyond 25 kg of BW/ m2, final BW and breast fillet weight decreased by 41 and 12 g, respectively. We conclude that increasing stocking density beyond 30 kg of BW/m2 adversely affects growth responses and meat yield of broilers grown to 1.8 kg but does not alter physiological stress indicators.
W A Dozier; J P Thaxton; J L Purswell; H A Olanrewaju; S L Branton; W B Roush
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Poultry science     Volume:  85     ISSN:  0032-5791     ISO Abbreviation:  Poult. Sci.     Publication Date:  2006 Feb 
Date Detail:
Created Date:  2006-03-09     Completed Date:  2006-04-14     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  0401150     Medline TA:  Poult Sci     Country:  United States    
Other Details:
Languages:  eng     Pagination:  344-51     Citation Subset:  IM    
USDA, Agriculture Research Service, Poultry Research Unit, Mississippi State 39762-5367, USA.
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MeSH Terms
Animal Nutritional Physiological Phenomena
Body Weight
Chickens / growth & development*
Housing, Animal*
Population Density
Stress, Physiological
Weight Gain

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

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