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)
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 |