afpt (version 1.0.0)

computeBodyFrontalArea: Body frontal area from scaling relation

Description

Body frontal area is a parameter that relates to body drag. This function estimates body frontal area based on empirical scaling relations with mass.

Usage

computeBodyFrontalArea(massEmpty, type = "other")

Arguments

massEmpty

empty body mass (in kg)

type

type of bird; available options are: “passerine” and “other”)

Value

Numeric value for the body frontal area.

Details

Passerine (Hedenstr<U+00F6>m and Ros<U+00E9>n 2003): \(S_b = 0.0129 m^{0.614}\)

Other (Pennycuick et al. 1988): \(S_b = 0.00813 m^{0.666}\)

References

Pennycuick, C. J., Obrecht III, H. H. and Fuller, M. R. (1988) Empirical estimates of body drag of large waterfowl and raptors. J. Exp. Biol. 135, 253--264.

Hedenstr<U+00F6>m, A. and Ros<U+00E9>n, M. (2003) Body frontal area in passerine birds. J. Avian Biol. 34, 159--162.

See Also

Bird

Examples

# NOT RUN {
massEmpty <- 0.215 # kg
Sb <- computeBodyFrontalArea(massEmpty)
print(Sb)
#   [1] 0.002920751 # m2

massEmpty <- 0.215 # kg
birdType <- "passerine" #
Sb <- computeBodyFrontalArea(massEmpty,birdType)
print(Sb)
#   [1] 0.005020037 # m2
# }