Oyster_ellipse_parameters function

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

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

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

Returns

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

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.

Author(s)

Niels J. de Winter

Note

Please cite Geoscientific Model Development paper dealing with the ShellTrace model

See Also

"Oyster_av_thickness"

Source

GitHub

Manuscript

Supplementary data

Author website

Examples

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