Oyster_ellipse_parameters {shelltrace}

Function that calculates the parameters of the base ellipse used for bivalve growth modelling

Description

Calculates the parameters a and b of the ellipse that forms the base of the shell in growth modelling. de Winter, N. J. (2017) <doi:10.5194/gmd-2017-137>

Usage

Oyster_ellipse_parameters(subincr_matrix, IncG, Oyster_height, Oyster_length)

Arguments

subincr_matrix

Data frame that contains characteristics of every sub-increment

IncG

Matrix of X- and Y-coordinates of all interpolated sub-increments

Oyster_height

Measured maximum height of the shell

Oyster_length

Measured maximum length of the shell in anterio-posterior direction

Details

Parameters of the base ellipse of the shell are calculated by calculating the ratio between measured shell height and length and the endpoints of all sub-increments

Value

subincr_matrix

Updated data frame that contains characteristics of every sub-increment, with ellipse parameters added

Note

Please cite Geoscientific Model Development paper dealing with the ShellTrace model

Author(s)

Niels J. de Winter

Source

GitHub
Manuscript
Supplementary data
Author website

References

de Winter, N. J.: ShellTrace v1.0 ? A new approach for modelling growth and trace element uptake in marine bivalve shells: Model verification on pacific oyster shells (Crassostrea gigas), Geosci. Model Dev. Discuss., https://doi.org/10.5194/gmd-2017-137, in review, 2017.

See Also

"Oyster_av_thickness"

Examples

  subincr_matrix4<-Oyster_ellipse_parameters(subincr_matrix3,IncG,Oyster_height,Oyster_height)