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Supply-Side Constraints Are Insufficient to Explain the Ontogenetic Scaling of Metabolic Rate in the Tobacco Hornworm, Manduca sexta

Figure 4

The COX activity per unit of protein decreases within an instar, but increases again at the next instar.

However, COX activity per unit mass decreases monotonically across instars, suggesting that intrinsic demand decreases as the larva grows.

Figure 4

doi: https://doi.org/10.1371/journal.pone.0045455.g004