Approximately 34,000 adult Aedes aegypti (L.) were released on Seahorse Key, and island off the Gulf coast of Florida. Ovitraps were used to collect eggs over a 21-day period after the release to determine oviposition cycles, and adult females were caught to assess the number of eggs in a single oviposition. Oviposition began 5 days after release, and peaks occurred at 4-day intervals. The average number of eggs for a single oviposition was 93+6. A mean daily adult survival rate of 0.82 was calculated by linear regression of eggs density on time (days) after release. Larval survival was strongly density-dependent in tests conducted in cages under ambient conditions. The adult survival and fecundity data were used to calculate rates of immature survival corresponding to assumed rates of population growth.