Comparison of amino acid isotopic composition in wild and captive Pacific bluefin tuna (<i>Thunnus orientalis</i>).

<p>Change in δ¹⁵N values of amino acids of white muscle tissue with time following a natural diet shift. A) Two source amino acids, glycine (unfilled circle), lysine (unfilled square), and B) two trophic amino acids - alanine (filled circle), proline (filled inverted triangle) are given. Wild samples are shown as grey shaded symbols.