Table 2.

Mean body mass and mean peak IPC discharge frequency for species included in allometric analyses of peak discharge frequency (Fig. 3, Table 3)

SpeciesBody mass (kg)aPeak discharge frequency (s-1)bLiterature source
Emu26.5 (1)10.2 (12) Burger et al., 1976
Goose5.231 (5)15.7 (13)Present study
Pekin/Mallard duck
    Pekin2.818 (9)13.8 (17)Present study
    Pekin3.1 (10)36 (42) Tallman and Grodins, 1982
    Pekin2.3 (8)31 (25) Berger et al., 1980
    Mallard1.25 (15)35 (16) Shoemaker and Hempleman, 2001
    Mallard1.25 (16)34.7 (15) Hempleman et al., 2000
    Weighted average1.99c30.3d
Chicken1.7 (12)26 (16) Gleeson, 1985
1.4 (12)37.3 (20) Nye et al., 1982
    Weighted average1.55c32.3d
Muscovy duck1.5 (6)23 (57) Fedde and Scheid, 1976
Pigeon0.446 (3)33.6 (3)Present study
Quail0.192 (6)36.0 (20)Present study
Lovebird0.045 (5)47.0 (17)Present study
  • IPC, intrapulmonary chemoreceptors.

    Numbers of abirds, bIPC are given in parentheses.

  • c Weighted by number of birds.

  • d Weighted by number of IPC.