Before the enrichment, the Ba isotopic ratios were close to the natural ratios expected in both tanks (Ba135/Ba138 = 0.092; Ba137/Ba138 = 0.157). The shift of isotopic composition was observed in all the
Curcumin of the Ba tank individuals confirming the Ba assimilation (Fig. 3). For all the organs, the response occurred 2–3 days after the enrichment. The digestive gland response was lower than the other biological compartments (Fig. 3) with a contribution from both spikes of between 0.4 and 1.5% (Table 4). In gills, muscle and the rest, the contribution of the first spike was less than 1% and of the second spike 4 5% (Table 4). The maximum response to the Ba enrichments was observed in the mantle where the spike contribution was 2% for the first enrichment and 12.5% for the second (Table 4). However, the isotopic enrichment factor indicates no difference of incorporation ability between both
isotopes (Table 4). The E.F. also highlights different incorporation abilities according soft tissue with digestive gland ≥ mantle ≥ gills > the rest > muscle.
