Effects of anticoagulants on stable-isotope values (13 C and 15 N) of shark blood components.
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abstract
The effects of anticoagulant EDTA and sodium heparin (SH) on stable carbon 13 C and nitrogen 15 N isotopic values of red blood cells (RBC) and blood plasma in juvenile blacktip reef sharks Carcharhinus melanopterus were analysed. Plasma preserved with anticoagulants was not isotopically distinct from plasma stored in no-additive control tubes but RBC 15 N values exhibited small enrichments when preserved with EDTA and SH. Results suggest EDTA and SH are viable anticoagulants for stable isotopic analyses of blood fractions but further studies are advised to validate results.