Abstract

1. 1. Lipid and fatty acid seasonal distribution from tissues of the freshwater shrimp Macrobrachium borelli was studied. 2. 2. Female gonads and hepatopancreas were the organs with the highest lipid percentages. They were mainly composed of triacylglycerols, with oleic acid as the major fatty acid. 3. 3. Total lipids and triacylglycerols from ovarian tissue increased during sexual maturation and they presented a peak during winter in hepatopancreas. 4. 4. Phospholipids were the dominant lipids in muscle. They were mainly constituted by eicosapentaenoic, oleic and arachidonic acids. 5. 5. The w3:w6 acid ratio was more than 1, which is very high compared to other freshwater invertebrates.

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