336

and the gestation period also is 1 mo, so at least two

broods can be produced during most wet seasons.

 Because the Mosquitofish is a live-bearer, migration

routes must be reopened during the wet season in order for

this species to gain entry to areas that have completely

dried. The Mosquitofish was the dominant species in

Corkscrew marsh during the summer and fall of 1974.

 One oviporous species that also is well adapted to

seasonally fluctuating habitat is the Marsh killifish,

Fundulus confluentes. This species deposits eggs that

survive dessication during the dry season (Harrington,

1959) and so can recruit areas that dry completely, even

when no migration routes are opened. The life cycle of

Fundulus confluentes suggests that this species should be

the most important prey species in upland ponds and other

areas that dry completely and where migration routes are

not open every year. This species was not collected at

Corkscrew, but it is the major food fish of Wood Storks in

Everglades National Park (Ogden et5 al., in press).

 Sunfish such as Redears and Bluegills are egg-laying

species in which the male builds a nest and guards and

defends the nest and young. Because they have a low

tolerance to hypoxia, they do not survive the dry season in

many areas where they occur, even in ponds that do not

completely dry, therefore they must recolonize from the few

places such as Lake Trafford where their dry-season

survival rates are high. Kushlan and Lodge (1974) observed