Prey selection of polar bears in Foxe Basin, Nunavut, Canada: evidence of dietary flexibility in a specialized predator

Data includes a set of 30 fatty acids (FAs) of individual polar bears and mean prey used to estimate predator diet via quantitative fatty acid signature analysis (QFASA). FAs are identified using the nomenclature A:Bn-X, where A is the carbon chain length, B is the number of double bonds, and X is the position of the first double bond in relation to the terminal methyl group. Typically, over 70 FAs are identified in each adipose tissue sample (of individual predator and prey) and expressed as the mass percentage of total FA.