Elemental turnover rates and trophic discrimination in juvenile Lebranche mulletMugil lizaunder experimental conditions

The aim of this study was to determine the isotopic-turnover rate (RIT ) and trophic-discrimination factor (FTD ) in muscle tissues of Lebranche mullet Mugil liza fed an experimental diet (δ13 C = -27·1‰; δ15 N = 1·0‰). Juvenile M. liza exhibited a relatively fast RIT , with a half-life (t50 ) of only 16 and 14 days for δ13 C and δ15 N respectively and a nearly complete isotopic turnover (t95 ) of 68 and 60 days for δ13 C and δ15 N.