Models spectral sensitivity (with oil droplets; optional) based on peak cone sensitivity according to the models of Govardovskii et al. (2000) and Hart & Vorobyev (2005).
sensmodel( peaksens, range = c(300, 700), lambdacut = NULL, Bmid = NULL, oiltype = NULL, beta = TRUE, om = NULL, integrate = TRUE, sensnames = NULL )
(required) a vector with peak sensitivities for the cones to model.
a vector of length 2 for the range over which to calculate the spectral sensitivities (defaults to 300nm to 700nm).
a vector of same length as peaksens that lists the cut-off
wavelength value for oil droplets. Needs either
oiltype to also
be entered. See Hart and Vorobyev (2005).
a vector of same length as peaksens that lists the gradient of line tangent to the absorbance spectrum of the oil droplets. See Hart and Vorobyev (2005).
a list of same length as peaksens that lists the oil droplet types (currently accepts only "T", C", "Y", "R", "P") when Bmid is not known. Calculates Bmid based on the regression equations found in Hart ad Vorobyev (2005).
TRUE the sensitivities will include the beta peak
See Govardovskii et al.(2000) (defaults to
a vector of same length as
range2 that contains ocular
media transmission data. If included, cone sensitivity will be corrected
for ocular media transmission. Currently accepts "bird" using values from
Hart et al. (2005), or user-defined values.
TRUE, each curve is transformed to have a
total area under the curve of 1 (best for visual models; defaults to
TRUE). NOTE: integration is applied before any effects of ocular media
are considered, for compatibility with visual model procedures.
A vector equal in length to
peaksens, specifying custom
names for the resulting sensitivity curves (e.g. c('s', 'm', 'l') for
short-, medium- and long-wavelength sensitive receptors.)
A data frame of class
rspec containing each cone model as a column.
Govardovskii VI, Fyhrquist N, Reuter T, Kuzmin DG and Donner K. 2000. In search of the visual pigment template. Visual Neuroscience 17:509-528, doi:10.1017/S0952523800174036
Hart NS, and Vorobyev M. 2005. Modeling oil droplet absorption spectra and spectral sensitivities of bird cone photoreceptors. Journal of Comparative Physiology A. 191: 381-392, doi:10.1007/s00359-004-0595-3
Hart NS, Partridge JC, Cuthill IC, Bennett AT (2000) Visual pigments, oil droplets, ocular media and cone photoreceptor distribution in two species of passerine bird: the blue tit (Parus caeruleus L.) and the blackbird (Turdus merula L.). J Comp Physiol A 186:375-387, doi:10.1007/s003590050437