Document Detail

Fertility and behavioral responses of roosters to diets differing in protein and calcium.
MedLine Citation:
PMID:  6728794     Owner:  NLM     Status:  MEDLINE    
Diets differing in calcium (approximately 3.2 and .9%) and protein (15 and 12%) were fed to assess their effects on fertility, behavior, and physiological traits of White Leghorn males from lines selected for high (HA) and low (LA) antibody titers in response to the administration of sheep erythrocytes. Two trials, terminated when the males were 721 and 380 days of age, respectively, were conducted. In Trial 1, the HA males consumed significantly more feed than the LA males and those fed the low protein diets consumed more feed than those fed the high protein diets. No significant differences in feed intake were observed in Trial 2. Neither line, calcium level, nor protein level had a consistent effect on body weight in either trial. There were no significant first or second order interactions between main effects. Comparisons within ages and trials for percentage and duration of fertility revealed no significant differences between lines, protein level, or calcium level. Although the HA males produced significantly more antibodies to canine erythrocytes, dietary effects on antibody titers, heterophil: lymphocyte ratios, and plasma corticosterone were not significant. Thus, there was no indication that dietary treatments were inducing physiological adaptation. Behavioral adaptations, however, were observed; differences were significant for fear, territoriality, air pecking, and head shaking. It was concluded that behavioral responses symptomatic of nutrient deficiencies occur when no overt deficiency is present; this infers that an animal's well-being cannot be assessed strictly on the basis of behavioral consequences.
J A Cherry; I Nir; E A Dunnington; D E Jones; W B Gross; P B Siegel
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.    
Journal Detail:
Title:  Poultry science     Volume:  63     ISSN:  0032-5791     ISO Abbreviation:  Poult. Sci.     Publication Date:  1984 May 
Date Detail:
Created Date:  1984-07-16     Completed Date:  1984-07-16     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0401150     Medline TA:  Poult Sci     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  863-70     Citation Subset:  IM    
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MeSH Terms
Antibody Formation
Behavior, Animal*
Body Weight
Calcium, Dietary / administration & dosage*
Chickens / genetics,  immunology,  physiology*
Dietary Proteins / administration & dosage*
Erythrocytes / immunology
Sheep / immunology
Reg. No./Substance:
0/Calcium, Dietary; 0/Dietary Proteins

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

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