Return the duration of the life stages (time units).
durationFuncDefault(stage, x, time, species, strain)(integer). The numbered life stage for which to return a duration
Vector of state variables within the DDE solver. To access a particular variable use: x$speciesName['stageName',strainNumber] e.g. for species 'Bacteria', stage 'reproductive', strain 2 use x$Bacteria['reproductive',2] If there is only one stage and strain in species 'Food', for example, use x$Food[1,1]
(scalar). The current time point in the DDE solver.
(integer). The numbered species for which to return a life stage duration.
(integer). The numbered strain for which to return a life stage duration.
Duration of the life stage for the stage, species, strain and time specified.