1. Graphical representation of the three different models used to estimate the rate of oxygen consumption V̇O2 from heart rate fh in a hypothetical arriving male with a bill length of 123.8mm and a body mass of 12.2kg (nutritional index NI=3.2).
Graphical representation of the three different models used to estimate the rate of oxygen consumption V̇O2 from heart rate fh in a hypothetical arriving male with a bill length of 123.8mm and a body mass of 12.2kg (nutritional index NI=3.2). The grey line represents the general linear regression model (GLR) for departing males, the broken lines use a combination of resting oxygen pulse (ROP) (from minimum resting fh, ρ, to maximum resting fh, R) and the linear regression for the birds walking on the treadmill (from minimum exercising fh, ε, to maximum walking fh, ω). The solid black lines represent the model using ROPs and active oxygen pulses (AOPs) as function of the nutritional index (NI).
G. Froget et al. J Exp Biol 2001;204:
© The Company of Biologists Limited 2001