Table 2.

Summary of parameters for system (1).

Variable	Description	Units
Γ,	Total inflow rate into the trophic factors	1/t
k	Limiting capacity of trophic factors	1/Tt
bn	Constant per cell rate at which Rn withdraws T	1/Rnt
bs	Constant per cell rate at which Rs withdraws T	1/Rst
g	Constant per cell rate at which C withdraws T	1/Ct
dn	Constant per cell rate at which Rn helps C via RdCVF	1/Ct
ds	Constant per cell rate at which Rs C via RdCVF	1/Ct
mn	Per cell energy consumption rate of Rn	1/t
ms	Per cell energy consumption rate of Rs	1/t
mc	Per cell energy consumption rate of C	1/t
m	Per cell rate of normal rods Rn becoming sick Rs	1/t
an	Per cell energy uptake rate bnq1 of Rn	1/Tt
as	Per cell energy uptake rate bsq2 of Rs	1/Tt
ac	Per cell energy uptake rate gq3 of C	1/Tt