Document Detail

Phosphorus nutrition and fasting: interrelated factors which affect the survival of young chickens exposed to high ambient temperature.
MedLine Citation:
PMID:  7365546     Owner:  NLM     Status:  MEDLINE    
The interaction of phosphorus nutrition and fasting on the tolerance of young chickens acutely exposed to high temperature was studied. We also investigated a possible relationship between plasma phosphate (Pi) and body temperature (Tr) of chicks during heat exposure. Survival time (ST) of 24-hour fasted (F-24) chicks previously fed a low-phosphorus diet (LP) was markedly lower than ST of F-24 chicks fed an adequate phosphorus diet (AP). Diet, however, had no effect on ST of chicks fasted 12 hours (F-12). The apparent metabolic responses of F-24 chicks were qualitatively different than those of F-12 chicks suggesting that the effect of previous phosphorus nutrition was dependent on metabolic status of chicks before heat exposure. The concentration of Pi during heat exposure of F-24 chicks fed the experimental diets was highly (P less than 0.001) correlated with Tr. At heat-induced exhaustion, Tr of chicks fed either diet was not different. Pi of these groups at this point was nearly identical despite marked differences in the time at which this event occurred. An investigation concerning a possible relationship between Pi and the respiratory failure known to occur in hyperthermic chickens, revealed that respiratory muscular fatigue is not the primal cause of respiratory failure. Our results demonstrated that phosphorus nutrition, Pi and metabolic status are dependent factors related to the tolerance of young chickens exposed to high temperature.
C C McCormick; J D Garlich; F W Edens
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The Journal of nutrition     Volume:  110     ISSN:  0022-3166     ISO Abbreviation:  J. Nutr.     Publication Date:  1980 Apr 
Date Detail:
Created Date:  1980-06-16     Completed Date:  1980-06-16     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  0404243     Medline TA:  J Nutr     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  784-94     Citation Subset:  IM    
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MeSH Terms
Body Temperature
Calcium Phosphates / pharmacology*
Chickens / physiology*
Heat Exhaustion / metabolism*,  mortality
Hot Temperature*
Muscles / metabolism
Phosphates / blood
Respiratory Insufficiency / etiology
Time Factors
Reg. No./Substance:
0/Calcium Phosphates; 0/Phosphates

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

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