DODD: ECOLOGY OF SANDHILLS POPULATION OF GASTROPHRYNECAROLINENSIS 17


 500


 ex
 400


 E
 < 300 ex
 -J
 I-

 < 200



 100 x x



 0
 O J A J 0 J A J 0 J A J
 851 86 I 87 1 88




 500



 400


 E
 300
 e e
 x

 2 200
 Ir


 100




 0 J A J 0 J A J
 88 89 90



Fig. 1. Monthly rainfall totals at Breezeway Pond, Putnam Co., Florida, October 1985-September 1990. The
stippled bars at the top of the figure illustrate the duration of the hydroperiod. No water was present in the
pond at other times of the year. The stars indicate months with substantial movements of Gastrophryne
carolinensis into (e) or away from (x) the pond.