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Table 1 Equations used to rebuild body mass from beak size (LRL or LHL) for each species

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

Superorder and order Family Species Equation References No. of individuals
Octopodiformes
Octopoda Octopodidae Eledone cirrhosa ln W = 1.68 + 2.85 * ln LHL Clarke (1986) 214
  Pteroctopus tetracirrhus W = 0.951 + 0.928 * LHL Present paper (only juveniles) 11
  Scaeurgus unicirrhus W = 0.943 + 0.937 * LHL Present paper (only juveniles) 6
Argonautidae Argonauta argo ln W =− 0.545 + 3.26 * ln LHL Present paper 10
Ocythoidae Ocythoe tuberculata ln W = −1.05 + 2.51 * ln LHL Lu and Ickeringill (2002) 16
Tremoctopodidae Tremoctopus violaceus ln W = 0.390 + 2.829 * ln LHL Present paper 8
Decapodiformes
Oegopsida Brachioteuthidae Brachioteuthis riisei ln W = −0.81 + 2.94 * ln LRL Lu and Ickeringill (2002) 25
Chiroteuthidae Chiroteuthis veranyi ln W = −0.241 + 2.7 * ln LRL Clarke (1980) 14
Cranchiidae Galiteuthis armata ln W = 0.700 + 2.233 * ln LRL Present paper 5
Ancistrocheiridae Ancistrocheirus lesueurii ln W = −0.194 + 3.56 * ln LRL Clarke (1980) 21
Enoploteuthidae Abralia veranyi ln W = 0.979 + 2.304 * ln LRL Present paper 5
Histioteuthidae Histioteuthis bonnellii ln W = 1.594 + 2.31 * ln LRL Clarke (1986) –
Histioteuthis reversa ln W = 1.41 + 2.35 * ln LRL Lu and Ickeringill (2002) 10
Octopoteuthidae Octopoteuthis cfr sicula ln W = 0.23 + 2.54 * ln LRL Lu and Ickeringill (2002) 9
Ommastrephidae Illex coindetii ln W = 1.174 + 2.47 * ln LRL Clarke (1962a, b) 14
Ommastrephes bartrami ln W = 1.834 + 2.07 * ln LRL Wolff (1982) –
Todarodes sagittatus ln W = 0.783 + 2.83 * ln LRL Clarke (1962a, b) –
Todaropsis eblanae ln W = 1.066 + 2.724 * ln LRL Zumholz and Piatkowski (2005) 313
Onychoteuthidae Ancistroteuthis lichtensteinii ln W = 0.09 + 3.23 * ln LRL Lu and Ickeringill (2002) 18
Onychoteuthis banksii ln W = 0.58 + 3.7 * ln LRL Wolff (1984) –
Thysanoteuthidae Thysanoteuthis rhombus ln W = 2.855 + 3.06 * ln LRL Clarke (1962a, b) 7
Myopsida Loliginidae Alloteuthis subulata ln W = 2 + 2.75 * ln LRL Clarke (1986) 116
Sepioidea Sepiolidae Heteroteuthis dispar ln W = 1.033 + 2.527 * ln LRL Present paper 14
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Helgoland Marine Research

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