Attributes / relations provided by
♦ ¹THE DIET OF HARBOUR PORPOISE (PHOCOENA PHOCOENA) IN THE NORTHEAST ATLANTIC, M. B. SANTOS & G. J. PIERCE, Oceanography and Marine Biology: an Annual Review 2003, 41, 355–390
♦ ²Feeding ecology of the South American sea lion Otaria flavescens: food contents and food selectivity, Mario George-Nascimento, Rodrigo Bustamante and Ciro Oyarzun, Mar. Ecol. Prog. Ser. 21 135-143, 1985