Résumé
ID - identification code for each whisker sample Year - year whisker sample was collected Sex - sex of individual sampled. F = female, M = male Sp - species of individual. SAFS = South American fur seal, SASL = South American sea lion Portion = Number of the portion or fragment of the whisker d15N = stable isotope ratio value for d15N d13C = stable isotope ratio value for d13C