DODD: ECOLOGY OF SANDHILLS POPULATION OF GASTROPHRYNE CAROLINENSIS


 1986(96%)

100%

75%

50%

25%


 J F M A M J J A S O N D
 E3Females U (1 39) OFemales R (431

 1988(96%)

100%

75%

50%9,

25%


 JF M AM J J A S O N D
 FIFemales U (338) [Females R (125)


 1990(97%)

100%

75%

50%

25%

 0% -
 J F M A M J J A S O N D
 Female U (63) Females R (35)
 jFemales U (63) MFemales R (35)


 1987 (98%)
100%

75%

50%-

25%

 J F M A M J J A S O N D
 E Females U (183) E Females R (107)

 1989(96%)

100% .


75%



25%


V I.


 J F M A M J J A S O N D
DFemales U (175) 0Females R (112)


 Total 1986-1 990 (98%)

100%

75%-

50% -

25%


 J F M AM J J A S O N D
 FFemales U (831) EFemales R (411)


Fig. 5. Proportional capture of unmarked (U) to recaptured (R) female Gastrophryne carolinensis during
the principle activity season at Breezeway Pond, Putnam Co., Florida, 1986 1990. The number in
parentheses after the year is the percentage of the total number of females captured within that year.



There was no trend toward a 1:1 sex ratio as the season progressed in any year
(Table 4).
 Population size structure varied somewhat among years (Fig. 6). In 1987,
 1988, and 1990, the population structure was unimodal with few or no juveniles
 and very large animals among the unmarked toads. In 1986 and 1988, the