Dietary fat concentrations influence fatty acid assimilation patterns in Atlantic pollock (Pollachius virens).

ABSTRACT: A key aspect in the use of fatty acids (FA) to estimate predator diets using quantitative FA signature analysis (QFASA) is the ability to account for FA assimilation through the use of calibration coefficients (CC). Here, we tested the assumption that CC are independent of dietary fat concentrations by feeding Atlantic pollock (Pollachius virens) three formulated diets with very similar FA proportions but different fat concentrations (5-9% of diet) for 20 weeks. CC calculated using FA profiles of diet and triacylglycerols in pollock liver were significantly different for the three diets. To test the robustness of diet estimates to these differences, we used the CC set derived from feeding the diet with the lowest fat concentration, published prey FA profiles and realistic diet estim

SUBMITTER: Budge SM 

PROVIDER: S-EPMC7333961 | biostudies-literature | 2020 Aug

REPOSITORIES: biostudies-literature