Insights into amino acid fractionation and incorporation by compound-specific carbon isotope analysis of three-spined sticklebacks.

ABSTRACT: Interpretation of stable isotope data is of upmost importance in ecology to build sound models for the study of animal diets, migration patterns and physiology. However, our understanding of stable isotope fractionation and incorporation into consumer tissues is still limited. We therefore measured the δ¹³C values of individual amino acids over time from muscle and liver tissue of three-spined sticklebacks (Gasterosteus aculeatus) on a high protein diet. The δ¹³C values of amino acids in the liver quickly responded to small shifts of under ± 2.0‰ in dietary stable isotope compositions on 30-day intervals. We found on average no trophic fractionation in pooled essential (muscle, liver) and non-essential (muscle) amino acids. Negative Δδ¹³C values of - 0.7 ± 

SUBMITTER: Hesse T 

PROVIDER: S-EPMC9270445 | biostudies-literature | 2022 Jul

REPOSITORIES: biostudies-literature