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Table 29. Maximum number of years between successful nestings necessary
to maintain long term stability in Wood Stork population, calculated from
Henny's (1970) life equation, under four different survival rates for
fledglings to age 1.


Portion
females
breeding
1st mature
year
 P


Femal e
fledglings
per year
per mature
female for
long term
stable pop


Allowable number
years between
successful nestings
at production rate
of 1.40 female
fledglings per
successful nest
 1.40/b


0.6 0.9 0.5 0.2407 5.82

0.5 0.9 0.5 0.2887 4.85

0.4 0.9 0.5 0.3610 3.88

0.2 0.9 0.5 0.7220 1.94


ab = (1-S)/SoS'(S + p(l-5))


Fledgling
survival
rate
to age 1


Average
survival
rate,
age 1-4