Dynamics of Free Fatty Acid Mobilization in Arctic Carnivores.

Lipid content of the blood plasma of arctic mammals is higher than in temperate zone counterparts. These animals are apparently able to maintain a high concentration of free fatty acids without serious deleterious effects due to a slower-clotting time (wolf) and an increased utilization of saturated...

Full description

Bibliographic Details
Main Author: Ferguson,J. Homer
Other Authors: ARCTIC INST OF NORTH AMERICA WASHINGTON D C
Format: Text
Language:English
Published: 1973
Subjects:
Biochemistry
Anatomy and Physiology
Stress Physiology
*Fatty acids
*Metabolism
*Arctic regions
*Carnivora
*Lipids
Mammals
Low temperature
Acclimatization
Corticosteroid agents
Photoperiodism
Diet
Arctic
Online Access:http://www.dtic.mil/docs/citations/AD0770236
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0770236
Description
Summary:Lipid content of the blood plasma of arctic mammals is higher than in temperate zone counterparts. These animals are apparently able to maintain a high concentration of free fatty acids without serious deleterious effects due to a slower-clotting time (wolf) and an increased utilization of saturated lipids. The diet is apparently balanced between saturated and unsaturated free fatty acids and does not differ significantly from food such as beef which might be available to temperate zone mammals. Seasonal fluctuation of plasma adrenocorticoids was found but did not effect plasma FFA significantly. Cold acclimation was found to be enhanced by shorter photoperiods after cold exposure, short photoperiod animals exhibited higher levels of FFA than did long photoperiod specimens. When cold acclimation was compared to exercise, similar results were obtained. An increase in muscle enzymes and heart hypertrophy was found in both situations. (Modified author abstract)

Similar Items