Fig. 2. Intraspecific scaling patterns of cephalopod molluscs. (A) Three published intraspecific scaling curves for benthic octopods are drawn with the interspecific pattern from Fig. 1. (B) Intraspecific scaling relationships are similar to intrafamilial relationships in Fig. 1. Colors and lines represent different families. Loliginidae, solid blue; Ommastrephidae, broken blue; Octopodidae, broken red; Histioteuthidae, solid red; Cranchidae, long broken red; Bolitaenidae, solid black; Vampyroteuthidae, broken black. (C) Intraspecific scaling coefficients (b from Eqn 1 in text) are significantly higher (less negative) for epipelagic squids (grey bar; Loliginidae and Ommastrephidae) than for mesopelagic cephalopods (black bar) (N in parentheses; values are means ± s.d.). Gonatids are not shown because the relationship between oxygen consumption and body mass was not significant (b0.0). See Table 2 for equations and sources.