Description Value Slots See Also
Inherits from Species and has slots for values that are common to predators but not prey.
Should not be instantiated; rather, instantiate the child classes.
sp_prefs
list. Prey species preferences (one list element per prey species).
age_prefs
list. A vector of predator preferences for prey age classes; one list element for each prey species.
omegas
list. Parameters that scale available prey biomass per species so they sum (roughly) to 1
prey_availability
list. Parameters used in model of spatial availability (one set per prey species in list elements named for the prey species. May also be used to store data for graphing availability.)
prey_effect
list. Parameters for the model that determines how much of an impact prey biomass has on predator recruitment
D0
numeric. The available, scaled total prey biomass in unfished condition. A scalar.
Dy
numeric. Available, scaled total prey biomass; a vector (time).
Fmax
numeric. Maximum fecundity (population lambda, from data).
bigPhi
numeric. Scaling parameter for reproduction.
phi
numeric. Sensitivity of predator reproduction to prey biomass
BHp
numeric. Beverton-Holt p parameter, which is affected by prey; a vector (time).
Mo
numeric. Maximum number of offspring; a scalar.
Nm
numeric. Number of mature predators; a vector (time).
N1P
numeric. Number of age-1+ predators; a vector (time).
K1P
numeric. Number of age-1+ predators when prey are unfished
NperK
numeric. Number of age-1+ predators per age-1+ predators when prey are unfished.
RperS
numeric. Recruits per spawner; a vector (time).
RperS_Punt
numeric. Recruits per spawner (Punt method); a vector (time).
parent class Species
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