Fatty acid isotopic composition in Atlantic pollock is not influenced by environmentally relevant dietary fat concentrations.

ABSTRACT: The application of fatty acid (FA) isotopic analysis has great potential in elucidating food web structure, but it has not experienced the same wide-spread use as amino acid isotopic analyses. The failure to adopt FA isotopic methods is almost certainly linked to a lack of reliable information on trophic fractionation of FA, particularly in higher predators. In this work, we attempt to address this shortfall, through comparison of FA δ¹³C values in captive Atlantic pollock (Pollachius virens) liver and their known diets. Since catabolism is likely the main cause of fractionation and it may vary with dietary fat content, we investigated the impact of dietary fat concentration on isotopic discrimination in FA. We fed Atlantic pollock three formulated diets with similar FA isotopic

SUBMITTER: Budge SM 

PROVIDER: S-EPMC10386935 | biostudies-literature | 2023 Jul

REPOSITORIES: biostudies-literature