Journal of the Marine Biological Association of the United Kingdom

Research Article

Cephalopods from the stomachs of a Risso's dolphin (Grampus griseus) from the Mediterranean

M. Würtza1, R. Poggia2 and Malcolm R. Clarkea3

a1 Istituto di Anatomia Comparata, Università di Genova, Genova, Italy

a2 Museo di Storia Naturale G. Doria, Genova, Italy

a3 Ancarva, Southdown, Millbrook, Torpoint, Cornwall, PL10 1EZ

Cephalopod remains from the stomachs of a Risso's dolphin (Grampus griseus Cuvier, 1812, Cetacea) entangled in a fishing net off the Ligurian coast (central Mediterranean Sea) include squids Ancistroteuthis lichtensteini, Histioteuthis bonnellii, H. reversa and Todarodes sagittatus and the sepiolid Heteroteuthis dispar. All these cephalopods live in oceanic water including water over the steep continental slope where Risso's dolphin is frequently sighted. Histioteuthis reversa contributed 78% of the cephalopods by number, 81% of the wet weight and 73% of the dry weight and calorific value. The total calorific value of the cephalopods represented by lower beaks was 17,300 kj.