Data supporting the submitted manuscript: Porpoise bone collagen as an indicator of North Sea ecosystem changes during the past 170 years

Amino acid Carbon and Nitrogen stable isotope data supporting the paper "<strong>Porpoise bone collagen as an indicator of North Sea ecosystem changes during the past 170 years"</strong> Bulk nitrogen stable isotope and amino acid nitrogen values for proline and lysine and amino acid carbon values for the essential amino acids phenylalanine, valine, leucine, isoleucine, and threonine. These samples are from bone collagen from 1850 to 2019 from Phocoena phoceona in the North Sea.