Long-term incubation duration decline indicates climate-change driven feminization of three sea turtle species in Florida, USA

This dataset underpins the article “Long-term incubation duration decline indicates climate-change driven feminization of three sea turtle species in Florida, USA” (Ceriani & Casale, 2025, Global Change Biology). The dataset compiles over 110,000 clutches of loggerhead (Caretta caretta), green (Chelonia mydas), and leatherback (Dermochelys coriacea) turtles monitored across Florida between 2001 and 2022. For each clutch, incubation duration (ID) and hatching outcomes (proportion of whole unhatched eggs) were recorded as part of Florida’s statewide sea turtle nesting productivity assessment program coordinated by the Florida Fish and Wildlife Conservation Commission (FWC). Incubation duration (ID) is used as a proxy for incubation temperature and thus the primary sex ratio (PSR). The data reveal long-term declines in ID consistent with increasing nest temperatures and feminization, alongside evidence of geographic and seasonal “male-producing refuges” and spatial variation in embryo mortality. Contents: · CSV/Excel tables containing per-clutch data on incubation duration, species, management unit/sub-area, year, and clutch outcomes (proportion of whole unhatched eggs). · Metadata files (READ_ME) describing variables and units. Geographic coverage: Florida, USA.Temporal coverage: 2001–2022 nesting seasons.