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J. Moll. Stud. (1999), 65, 233-240
© The Malacological Society of London 1999

Cephalopods in the Diet of Albacore, Thunnus alalunga, from the Adriatic Sea

Giambattista Bello

Laboratorio Provinciale di Biologia Marina, Molo Pizzoli, 70123 Bari, Italy

Present address: Acquario Provincia le Molo Pizzoli, 70123 Bari, Italy

The stomachs of 56 albacore (Thunnus alalunga) caught in the southern Adriatic Sea contained 222 cephalopods, or 29% of prey. Most cephalopod remains were from small specimens. Juveniles and adults of Heteroteuthis dispar (61.5% of cephalopods) were more frequently preyed upon in the `inshore' fishing area (bottom depth: 100-700 m); early juveniles of Todarodes sagittatus (21.6%) were more abundant ` offshore' (750- 1,150 m); early juveniles of Histioteuthis bonnellii (16.4%) were exclusive of the latter area. The estimated overall number of cephalopods dying of predation by albacore is 6.3 x 106 specimens/fishing season (two months).

(Received 6 May 1998; accepted 13 July 1998)


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