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Fig. 6. Diagram showing how the time-lagged logistic growth curve can be analogous
to the temporal course of
O2max during
acclimation in a negative feedback control system (in this hypothetical case,
the animal went from a warm to a cold temperature, as in the present study;
see Fig. 1).
Nt, population size at time t; r,
maximum rate of growth and/or of acclimation; 
, length of the delay
between stimulus and response.
O2max `warm' and
O2max `cold'
(dotted lines) represent the values of
O2max at
`equilibrium' - i.e. when the animal is actually acclimated to warm and cold
conditions. These values are analogous to the initial population size at
t=0 (N0) and the carrying capacity of the habitat
(K), respectively.
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