Body Mass Estimates Using cQE, AHR1985, CF2004, and CM1992

Share:

Description

This function returns body mass estimates for bipeds based on minimum femoral circumference using a set of five equations (intended for non-avian dinosaurs)

Usage

1
bipeds(FC, cQE.eq = "raw", cQE.cor = 2, data = NULL)

Arguments

FC

a value or vector representing femoral circumference (should be in mm)

cQE.eq

desired estimation equation for the cQE. Two possible choices (See cQE). "raw" is default

cQE.cor

correction factor to be used (α^2). The default is 2, as per Campione et al. (2014)

data

an optional object of class = "data.frame" or class = "matrix"

Details

This function returns estimates from five equations intented for terrestrial bipeds (in particular non-avian dinosaurs): Campione et al. (2014); Campione (in review); Anderson et al. (1985); Christiansen and Farina (2004); Campbell and Marcus (1992). For more details please see the specific functions.

If a data object is specified, the mass estiamtes and additional results will be added as columns to the data.frame or matrix within that object.

Value

Nine numeric values or columns are returned (all masses are in grams):

cQE

A numeric value or vector of mass estimates using cQE

upper.cQE

A numeric value or vector representing the upper prediction error of the cQE based on that derived for the specific equation in Campione and Evans (2012)

lower.cQE

A numeric value or vector representing the lower prediction error of the cQE

qcQE

A numeric value or vector of mass estimates using qcQE (quadratic equation)

upper.qcQE

A numeric value or vector representing the upper prediction error of qcQE derived for the specific equation in Campione (in review)

lower.qcQE

A numeric value or vector representing the lower prediction error of qcQE

AHR1985

A numeric value or vector of mass estimates using Anderson et al. (1985)

CF2004

A numeric value or vector of mass estimates using Christiansen and Farina (2004)

CM1992

A numeric value or vector of mass estimates using Campbell and Marcus (1992)

Author(s)

Nicolas E. Campione

References

Anderson, J. F., Hall-Martin, A. and Russell, D.A. (1985) Long-bone circumference and weight in mammals, birds and dinosaurs. Journal of the Zoological Society of London A, 207, 53-61.

Campbell Jr., K.E. and Marcus, L. (1992) The relationships of hindlimb bone dimensions to body weight in birds. Natural History Museum of Los Angeles County Science Series, 36, 395-412.

Campione, N. E., Evans, D. C., Brown, C. M. and Carrano, M. T. (2014) Body mass estimation in non-avian bipeds using a theoretical conversion to quadruped stylopodial proportions. Methods in Ecology and Evolution, 5(9), 913-923.

Campione, N. E. (in review) Extrapolation of a universal scaling relationship for estimating body masses in extinct terrestrial vertebrates.

Christiansen, P. and Farina, R. A. (2004) Mass prediction in theropod dinosaurs. Historical Biology, 16, 85-92.

See Also

cQE AHR1985 CF2004 CM1992