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primitive conditions. Results from the model do not

necessarily reflect events in the real system but do tend

to explain why biological events of years of similar

rainfall can be very different.

 Figure 79 allows for the comparison of simulated prey

fish density from the model with actual measurements of

fish (both prey and predator species) density at an

alligator hole in the Big Cypress reported by Kushlan

(1976). Although the patterns are not identical, there is

some similarity, particularly in the differences in

magnitude between the 1969-70 peaks and those in later

years. The simulation shows a sustained high density of

fish from early 1970 through early 1971, while the plot of

actual measurements at the alligator hole show two peaks.

The difference is due to the fact that the model did not

duplicate the fish kill of May 1970 that occurred at

unusually high water levels (see Kushlan, 1972 and 1974 for

a description of the 1970 fish kill).

 Figure 80 shows annual breeding success (fledgling

production), number of breeding adults, and total number of

birds in the Wood Stork population of southwest Florida,

simulated under primitive and present conditions. The long

term cycle evident in the primitive simulation roughly

corresponds to the pattern of total annual rainfall in the

study area during the same period of time (see Figure 2),

suggesting that entrainment of the intrinsic frequency by

the extrinsic frequency as discussed on page 31 of the