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Fig. 9. Relationship between body mass and (A) hypoxia tolerance (critical oxygen
concentration), and (B) metabolic rate (routine oxygen consumption) in
juvenile and adult coral-reef fishes (excluding pre-settlement larvae). Note
that while hypoxia tolerance does not change with body mass, metabolic rate
shows the `classical' scaling relationship with body mass. The dataset
includes 174 individuals weighing between 40 mg and 40 g and representing 35
species from six families, and is largely the same as that presented in
Table 1 [mostly from Nilsson
and Östlund-Nilsson (Nilsson and
Östlund-Nilsson, 2004), with additional individuals from
Östlund-Nilsson and Nilsson
(Östlund-Nilsson and Nilsson,
2004) and Nilsson et al.
(Nilsson et al., 2007b)]. For
the whole dataset, the mass-specific metabolic rate was related to
mass–0.367 (which translates into a scaling exponent of
1–0.367=0.633 for absolute metabolic rate; r=0.80). For the
best represented family, Pomacentridae with 99 individuals from 14 species,
the same scaling exponents were –0.347 (mass-specific metabolic rate)
and 0.653 (absolute metabolic rate) (r=0.94). Temperature was
28–30°C.
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