| The impact of dietary fats, photoperiod, temperature and season on morphological variables, torpor patterns, and brown adipose tissue fatty acid composition of hamsters, Phodopus sungorus. | |
| | |
MedLine Citation:
|
PMID: 8576453 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
|
We investigated how dietary fats and oils of different fatty acid composition influence the seasonal change of body mass, fur colour, testes size and torpor in Djungarian hamsters, Phodopus sungorus, maintained from autumn to winter under different photoperiods and temperature regimes. Dietary fatty acids influenced the occurrence of spontaneous torpor (food and water ad libitum) in P. sungorus maintained at 18 degrees C under natural and artificial short photoperiods. Torpor was most pronounced in individuals on a diet containing 10% safflower oil (rich in polyunsaturated fatty acids), intermediate in individuals on a diet containing 10% olive oil (rich in monounsaturated fatty acids) and least pronounced in individuals on a diet containing 10% coconut fat (rich in saturated fatty acids). Torpor in P. sungorus on chow containing no added fat or oil was intermediate between those on coconut fat and olive oil. Dietary fatty acids had little effect on torpor in animals maintained at 23 degrees C. Body mass, fur colour and testes size were also little affected by dietary fatty acids. The fatty acid composition of brown fat from hamsters maintained at 18 degrees C and under natural photoperiod strongly reflected that of the dietary fatty acids. Our study suggests that the seasonal change of body mass, fur colour and testes size are not significantly affected by dietary fatty acids. However, dietary fats influence the occurrence of torpor in individuals maintained at low temperatures and that have been photoperiodically primed for the display of torpor. |
| | |
Authors:
|
F Geiser; G Heldmaier |
Related Documents
:
|
8587983 - Two novel thioesterases are key determinants of the bimodal distribution of acyl chain ... 9358433 - Comparative hypocholesterolemic effects of six dietary oils in cholesterol-fed rats aft... 1566843 - Distinction between chloride-dependent transport systems for taurine and beta-alanine i... |
Publication Detail:
|
Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
|
Title: Journal of comparative physiology. B, Biochemical, systemic, and environmental physiology Volume: 165 ISSN: 0174-1578 ISO Abbreviation: J. Comp. Physiol. B, Biochem. Syst. Environ. Physiol. Publication Date: 1995 |
Date Detail:
|
Created Date: 1996-03-11 Completed Date: 1996-03-11 Revised Date: 2009-06-08 |
Medline Journal Info:
|
Nlm Unique ID: 8413200 Medline TA: J Comp Physiol B Country: GERMANY |
Other Details:
|
Languages: eng Pagination: 406-15 Citation Subset: IM |
Affiliation:
|
Philipps-Universität, Marburg, Germany. |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
Adipose Tissue, Brown
/
metabolism* Animals Behavior, Animal / physiology Body Weight / physiology Cricetinae / physiology Dietary Fats / metabolism*, pharmacology Eating / physiology Fats / chemistry Fatty Acids / metabolism* Female Hair Color / physiology Male Organ Size / physiology Photoperiod Reproduction / physiology Seasons Temperature Testis / anatomy & histology |
| Chemical | |
Reg. No./Substance:
|
0/Dietary Fats; 0/Fats; 0/Fatty Acids |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Mechanisms of fluid and ion secretion by the parotid gland of the kangaroo, Macropus rufus, assessed...
Next Document: Eclosion hormone-stimulated cGMP levels in the central nervous system of Manduca sexta: inhibition b...