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♦ ¹Activity patterns and foraging behaviour of Audouin’s gulls in the Ebro Delta, NW Mediterranean, SANTI MAÑOSA, DANIEL ORO and XAVIER RUIZ, SCI. MAR., 68 (4): 605-614 (2004)
♦ ²Intraspecific dietary variation in the short-beaked common dolphin Delphinus delphis in the Bay of Biscay: importance of fat fish, Laureline Meynier, Claire Pusineri, Jérôme Spitz, M. Begoña Santos, Graham J. Pierce, Vincent Ridoux, MARINE ECOLOGY PROGRESS SERIES Vol. 354: 277–287, 2008
♦ ³Diet of common dolphins, Delphinus delphis, off the Portuguese continental coast, M.A. Silva, J. Mar. Biol. Ast. U.K. (1999), 79, 531-540