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Related Concept Videos

Lipids: Dietary Sources and Requirements01:18

Lipids: Dietary Sources and Requirements

Lipids are an essential component of a balanced human diet. Triglycerides, which make up the majority of dietary lipids, are found in both saturated fats—commonly present in meat, dairy products, and certain tropical plants like coconut, and hydrogenated oils such as margarine and baking shortenings (trans fats)—and unsaturated fats, which are abundant in seeds, nuts, olive oil, and most vegetable oils. The main sources of cholesterol include egg yolks, various meats and organ meats, shellfish,...
Structure of Lipids03:38

Structure of Lipids

Lipids include a diverse group of compounds that are largely nonpolar in nature. This is because they are hydrocarbons that include mostly nonpolar carbon-carbon or carbon-hydrogen bonds. Non-polar molecules are hydrophobic (“water fearing”), or insoluble in water. Lipids perform many different functions in a cell. Cells store energy for long-term use in the form of fats. Lipids also provide insulation from the environment for plants and animals. For example, they help keep aquatic birds and...
Marine Microbial Ecology01:30

Marine Microbial Ecology

Marine microbial ecosystems are shaped by distinct physicochemical limits, including high salinity, low nutrient availability, and fluctuating oxygen levels. These conditions favor smaller microbial cell sizes, which maximize their surface-to-volume ratio for efficient nutrient uptake.Microbial activity and community composition are closely linked to biogeochemical cycles, particularly in dynamic environments like estuaries, where halotolerant microbes thrive in response to variable salinity...
Lipid-derived Compounds in the Human Body01:31

Lipid-derived Compounds in the Human Body

Fats and lipids are crucial components in the human body. Some lipid-derived compounds, such as fat-soluble vitamins, eicosanoids, lipoproteins, and glycolipids, also play unique roles to support various  biological processes .
Fat-soluble Vitamins
Fat-soluble vitamins, including vitamins A, D, E, and K, are required in minimal quantities, but their deficiencies can lead to severely abnormal physiological conditions. For example, vitamin A deficiency can cause night blindness, dry skin, delayed...
Atherosclerosis III: Management01:26

Atherosclerosis III: Management

Management of atherosclerosis involves an integrated strategy encompassing pharmacological treatment, surgical interventions, lifestyle changes, and nutrition therapy to address the multifactorial nature of the disease.Pharmacological TherapyA cornerstone of atherosclerosis management is the use of pharmacological agents. Statins, such as atorvastatin, are pivotal in inhibiting HMG-CoA reductase, an enzyme that catalyzes an initial step in cholesterol synthesis in the liver. This reduction in...
Lipid Digestion01:06

Lipid Digestion

Lipids are large molecules that are generally not water-soluble. Since most of the digestive enzymes in the human body are water-based, there are specific steps the body must take to break down lipids and make them available for use.

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Updated: Jul 6, 2026

Determination of Total Lipid and Lipid Classes in Marine Samples
14:59

Determination of Total Lipid and Lipid Classes in Marine Samples

Published on: December 11, 2021

From aquatic to terrestrial food webs: decrease of the docosahexaenoic acid/linoleic acid ratio.

Apostolos-Manuel Koussoroplis1, Charles Lemarchand, Alexandre Bec

  • 1Laboratoire LMGE, UMR CNRS 6023, Equipe Réseaux Trophiques Aquatiques, Université Blaise Pascal, 24, Avenue des Landais, 63177 Aubière, France. a-manuel.KOUSSOROPLIS@univ-bpclermont.fr

Lipids
|March 13, 2008
PubMed
Summary
This summary is machine-generated.

Carnivorous mammals show distinct fatty acid profiles based on their diet. The docosahexaenoic acid (DHA) to linoleic acid (LNA) ratio can indicate shifts in foraging behavior between aquatic and terrestrial food webs.

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Fatty Acid 13C Isotopologue Profiling Provides Insight into Trophic Carbon Transfer and Lipid Metabolism of Invertebrate Consumers
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Fatty Acid 13C Isotopologue Profiling Provides Insight into Trophic Carbon Transfer and Lipid Metabolism of Invertebrate Consumers

Published on: April 17, 2018

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Last Updated: Jul 6, 2026

Determination of Total Lipid and Lipid Classes in Marine Samples
14:59

Determination of Total Lipid and Lipid Classes in Marine Samples

Published on: December 11, 2021

Fatty Acid 13C Isotopologue Profiling Provides Insight into Trophic Carbon Transfer and Lipid Metabolism of Invertebrate Consumers
11:14

Fatty Acid 13C Isotopologue Profiling Provides Insight into Trophic Carbon Transfer and Lipid Metabolism of Invertebrate Consumers

Published on: April 17, 2018

Area of Science:

  • Zoology
  • Ecology
  • Biochemistry

Background:

  • Carnivorous mammals occupy diverse ecological niches, foraging in both aquatic and terrestrial environments.
  • Dietary habits significantly influence the fatty acid composition of adipose tissue in mammals.
  • Understanding these variations is crucial for assessing ecological roles and adaptations.

Purpose of the Study:

  • To investigate the fatty acid composition in the adipose tissue of six carnivorous mammalian species.
  • To determine if fatty acid profiles correlate with varying degrees of reliance on aquatic versus terrestrial food webs.
  • To explore the potential of specific fatty acid ratios as indicators of foraging behavior.

Main Methods:

  • Analysis of adipose tissue fatty acid composition using gas chromatography.
  • Comparison of polyunsaturated fatty acid (PUFA) profiles across six species: European otter, American mink, European mink, European polecat, stone marten, and European wild cat.
  • Statistical analysis to identify significant differences in fatty acid ratios.

Main Results:

  • Significant interspecific differences were observed in the polyunsaturated fatty acid composition.
  • A notable trend showed a decrease in the docosahexaenoic acid (DHA)/linoleic acid (LNA) ratio as species reliance on aquatic food webs diminished.
  • The DHA/LNA ratio varied significantly among species with different foraging strategies.

Conclusions:

  • The DHA/LNA ratio serves as a valuable indicator of foraging behavior in semi-aquatic mammals.
  • This ratio can be utilized as a proxy in long-term ecological studies to track dietary shifts.
  • Fatty acid analysis provides insights into the trophic ecology and adaptive strategies of carnivorous mammals.