Attributes / relations provided by
♦ ¹Differences in diet of Atlantic bluefin tuna (Thunnus thynnus) at five seasonal feeding grounds on the New England continental shelf, Bradford C. Chase, Fishery Bulletin 100 no2 168-80 Ap 2002
♦ ²del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona.
♦ ³Feeding habits and trophic levels of Mediterranean fish, Konstantinos I. Stergiou & Vasiliki S. Karpouzi, Reviews in Fish Biology and Fisheries 11: 217–254, 2002