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Table 2 Total number (N) and estimated weight (eW) of each cephalopod species identified from the stomach contents of large pelagic predators caught in the central Mediterranean, together mean values of beak size (LRL or LHL in mm) and estimated cephalopod weight (eW)

From: Pelagic cephalopods of the central Mediterranean Sea determined by the analysis of the stomach content of large fish predators

Superorder and order Family Cephalopod species N eW (g) LRL/LHL (mm) eW (g)
Mean SD Mean SD
Octopodiformes
Octopoda Octopodidae Eledone cirrhosa (Lamarck, 1798) 2 4.8 0.8 2.4
Pteroctopus tetracirrhus (Delle Chiaje, 1830) 67 104.2 0.7 0.2 1.6 0.2
Scaeurgus unicirrhus (Delle Chiaje, 1840) 30 45.1 0.6 0.1 1.5 0.1
Argonautidae Argonauta argo Linnaeus, 1758 47 456.2 2.1 1.5 8.6 12.2
Ocythoidae Ocythoe tuberculata Rafinesque, 1814 18 106.7 2.1 1.8 5.5 7.5
Tremoctopodidae Tremoctopus violaceus Delle Chiaje, 1830 81 11,192.6 2.5 1.5 138.2 509.9
Decapodiformes
Oegopsida Brachioteuthidae Brachioteuthis riisei (Steenstrup, 1882) 6 38.8 2.4 0.4 6.5 2.7
Chiroteuthidae Chiroteuthis veranyi (Férussac, 1835) 20 260.1 2.4 1.1 13.0 18.6
Cranchiidae Galiteuthis armata Joubin, 1898 16 178.1 2.6 0.9 11.1 17.4
Ancistrocheiridae Ancistrocheirus lesueurii (Férussac and d’Orbigny, 1842) 16 1,493.7 2.0 2.1 92.9 189.5
Enoploteuthidae Abralia veranyi (Rüppell, 1844) 4 8.7 1.5 0.4 2.2 1.2
Histioteuthidae Histioteuthis bonnellii (Férussac, 1835) 21 797.4 2.1 1.0 38.0 52.3
Histioteuthis reversa (Verrill, 1880) 27 1053.2 2.9 0.7 55.7 29.8
Octopoteuthidae Octopoteuthis cfr sicula Rüppell, 1844 1 935.3
Ommastrephidae Illex coindetii (Vérany, 1839) 152 11,259.8 3.1 1.6 74.1 65.2
Ommastrephes bartrami (Lesueur, 1821) 39 6,611.5 4.2 2.5 169.5 256.9
Todarodes sagittatus (Lamarck, 1798) 565 46,098.2 2.7 1.8 81.6 122.5
Todaropsis eblanae (Ball, 1841) 2 273.8 3.7 136.9
Onychoteuthidae Ancistroteuthis lichtensteinii (Férussac and d’Orbigny, 1835) 302 11,335.0 2.4 1.2 37.5 53.5
Onychoteuthis banksii (Leach, 1817) 270 2,587.1 1.2 0.6 9.6 22.5
Thysanoteuthidae Thysanoteuthis rhombus Troschel, 1857 6 45,192.0 5.6 3.7 7,532.0 11,263.5
Myopsida Loliginidae Alloteuthis subulata (Lamarck, 1798) 2 7.7 0.8 3.9
Sepioidea Sepiolidae Heteroteuthis dispar (Rüppell, 1845) 1,402 1,317.9 0.9 0.2 0.8 1.3