Lipids of the Antarctic sei whale,Balaenoptera borealis |
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Authors: | Nestor R Bottino |
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Affiliation: | (1) Department of Biochemistry and Biophysics, Texas Agricultural Experiment Station, Texas A&M University System, 77843 College Station, Texas |
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Abstract: | The blubber, liver, and muscle of the Antarctic sei whale were analyzed for total lipid content, composition of lipid by classes
and positional distribution of fatty acids in individual lipids. The major glycerolipids (triglycerides, phosphatidylcholine,
and phosphatidylethanolamine) were fractionated by silver nitrate thin layer chromatography. The phospholipid fractions were
analyzed for fatty acid positional distribution. The whale stomach contained almost exclusively the amphipodParathemisto gaudichaudi. Its lipids were also studied and compared with the lipids of the body tissues. The results indicate that the stomach content
lipids are subjected to modifications before being deposited in the blubber, liver, and muscle. According to the silver nitrate
thin layer chromatographic studies, liver and blubber triglycerides resemble each other in their patterns of positional distribution
of fatty acids and in molecular species composition. The phospholipids of liver and blubber also exhibited closely related
fatty acid distribution patterns. In general, while the proportions of lipid classes and their predominant fatty acids varied
from tissue to tissue, the patterns according to which the lipids had been synthesized seemed to be common.
“...And beneath the effulgent Antarctic skies I have boarded the Argo-Navis, and joined the chase against the starry Cetus
far beyond the utmost stretch of Hydrus and the Flying Fish.” (1). |
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