Publication Date:
1984-11-16
Description:
In winter, the ratio of serum urea to serum creatinine is 10 or less in denning female and male bears. In midsummer it is 22 or more, similar to that of other mammals. However, in late summer and early fall, while food is available, the urea-to-creatinine ratio approaches or becomes 10 or less. The low value of this ratio appears to indicate the biochemical state of hibernation, and many bears are in this state weeks before they den.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Nelson, R A -- Beck, T D -- Steiger, D L -- New York, N.Y. -- Science. 1984 Nov 16;226(4676):841-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6494914" target="_blank"〉PubMed〈/a〉
Keywords:
Animal Population Groups/*blood
;
Animals
;
Animals, Wild/*blood/physiology
;
Carnivora/*blood
;
Creatinine/*blood
;
Diet
;
Female
;
Food Supply
;
Hibernation
;
Male
;
Seasons
;
Urea/*blood
;
Ursidae/*blood/physiology
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
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