Fig. 2: Unique temperature sensitivities of metabolic traits in vertical migrators.
From: Unique thermal sensitivity imposes a cold-water energetic barrier for vertical migrators
a–c, Standard metabolic rates (Y, SMR; a), critical oxygen pressures (Y, PcSMR; b) and the oxygen supply capacity (Y, α = SMR PcSMR−1; c) as a function of temperature (X) in tropical vertical migrators (red) and diverse coastal species (black; Supplementary Table 2). d, The temperature sensitivities (E) for SMR (X) and PcSMR (Y) are similar to each other (y = 0.94X + 0.21, n = 7 species; P = 0.06, two-tailed t-test; Supplementary Table 2), falling just above the dashed unity line. For coastal species, the SMR is more temperature sensitive than PcSMR (Supplementary Table 2; y = 0.62X - 0.06, n = 20 species; P = 4.3 × 10−5, two-tailed t-test). Thus, in migrators, the oxygen supply capacity is higher (P = 1.76 × 10−9; two-tailed t-test) and relatively insensitive to temperature (P = 3.06 × 10−10, two-tailed t-test) compared with coastal marine animals.
