Tropical calanoid copepod stable isotope data from the Mexican Pacific

Stable isotope values (δ¹⁵N and δ¹³C) of 20 calanoid copepod species, 3 zooplankton size fractions and seston were assessed from samples obtained monthly between January and December 2012 at a coastal sampling site in the Eastern Tropical Pacific off Mexico (19°09'03" N, 104°44'50" W).