11 .5. Model Results
225
1: TOTAL ADULT ... 2: TOTAL ADULT ... 3: TOTAL ADULT ... 4: TOTAL ADULT ... 5: TOTAL ADULT ...
1: 4000000 .00
I
I
1:
25.00
50.00
75.00
100.00
Seasons
FIGURE 11.11
higher rates, populations face potential collapse . In all cases, a single or combined 10% exploitation rate can still maintain stable population levels. Owing
to their strong reliance on horseshoe crab eggs, changes in shorebird populations in the model mimic changes in the adult crab populations.
Figures 11.13 and 11.14 show the effects of incremental changes in exploitation for the eel industry on horseshoe crab and shorebird populations,
2: BIRDS
1: BIRDS
1: 2000000 .00
3: BIRDS
4: BIRDS
5: BIRDS
1:
25.00
50.00
75.00
5
100.00
Seasons
FIGURE 11.12