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♦ ¹A Quantitative Assessment of the Diet of the Blue Shark (Prionace glauca) off Nova Scotia, Canada, Meaghen E. McCord and Steven E. Campana, J. Northw. Atl. Fish. Sci., Vol. 32: 57-63
♦ ²Feeding ecology of sympatric European shags Phalacrocorax aristotelis and great cormorants P. carbo in Iceland, Kristjan Lilliendahl, Jon Solmundsson, Marine Biology (2006) 149: 979–990