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Liver oils from Atlantic and Pacific dogfish (Squalus acanthias) have been compared for lipid classes, fatty acids of the total oil and of important lipid classes, and details of the alkyl chains in the 1-O-alkyl-2,3-diacylglycerol ethers (DAGE). In general there were few striking differences, confirming the view of biologists that these sharks are one species. The Pacific dogfish liver oil had a...