S01
S12
S23
S34
S45


F biomass of fish
B biomass of breeding birds
 and nestlings

WL minimum average weight
 of birds
WA robust average weight of birds
WM robust weight plus weight of
 egg
EA average number of eggs laid

 Thresholds for Controls
 s summer solar radiation
 f fall solar radiation
 1 low water area
 d fish density


survival rate, fledgling to Age 1
survival rate, Age 1 to 2
survival rate, Age 2 to 3
survival rate, Age 3 to 4
survival rate, Age 4 to 5


Egg laying Control

 1 B/N>WM
C :
1 0 B/N<WM


Migration Controls


C 1 S>s
C4
C 6
6 <s
 0 S<s


 1 S<f
C5 =
 0 S>f


M average mortality
 rate, birds 5 years
 and older
Q10function for temper-
 ature effect

P pulse (=1 for 1 dt)

Prey Fish Kill Switch


 Control
 1 F/A>d 1 A< 1
C = C =
 0 F/A<d 3 0 A>1


 Predator Fish Kill
 Control


I A<I2
0 A>1 2

1 A<14
0 A>14


 I A<I3
C-=
 0 A>13

 1 A< 5
C0 = 6