Summary statistics of δ13Cenamel and δ13Cdiet values of specimens dating to GI-1 in comparison to those from other periods. Data are arranged by taxon and site.

The final two rows for each taxon combine specimens from Taforalt and Rhafas. An additional row with data from the Younger Dryas (YD) and Heinrich Stadial (HS) 1 is included for Barbary sheep specimens from Taforalt, to illustrate Barbary sheep δ13Cenamel and δ13Cdiet values in the contexts immediately pre- and post-dating GI-1. T-test p-value results are further discussed in the text.