Hi all, I am working to describe the diet of Barau's Petrel at Reunion Island.To do this i will use stable isotopes, fatty acids and stomach contents.
My question is this: i have spun blood (plasma and RBC) samples to try and understand the dual foraging behavior of this species. For whole blood we use between 1 and 1.2mg of sample for stable isotope analyses. I have not been able to find anything on the weights used for plasma and RBC. How much plasma an red blood cell do you weight out for the stable isotope analysis?