Fig. 1

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δ13C vs. δ15N (mean ± S.D.) of Holothuria scabra and its potential food sources (sediment. biofilm. maize ad fish meals) during the feeding experiment. H. scabra reared on shrimp-farm sediment only (unenriched treatment) (A). H. scabra reared on shrimp-farm sediment and fishmeal (B) and H. scabra reared on shrimp-farm sediment and maizemeal (C). Fish and maize meal stable isotope compositions did not vary through the experiment.
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