1 Supplementary Information Long-term variation in the breeding diets of macaroni and eastern rockhopper penguins at Marion Island (1994–2018) FE Dakwa, PG Ryan, BM Dyer, RJM Crawford, PA Pistorius and AB Makhado African Journal of Marine Science 2021, 43(2) https://doi.org/10.2989/1814232X.2021.1901248 Supplementary Figure S1: Mean annual diet sample mass recovered from macaroni penguins Eudyptes chrysolophus and eastern rockhopper penguins E. filholi (sampled during the chick-rearing period, Dec–Feb or Jan–Mar, respectively) at Marion Island, from 1994 to 2018. (Note: No data were collected for eastern rockhopper penguins in 2002) 100 200 300 400 1994 1999 2004 2009 2014 Year Mass (g) Species Macaroni Rockhopper