Dissertation/Thesis Abstract

Hatchling sex ratios and nest temperature-sex ratio response of three South Florida marine turtle species (Caretta caretta L., Chelonia mydas L., and Dermochelys coriacea V.)
by Rogers, Micah Marie, M.S., Florida Atlantic University, 2013, 114; 1523458
Abstract (Summary)

South Florida's loggerhead (Caretta caretta), green (Chelonia mydas) and leatherback (Dermochelys coriacea ) sea turtles hatchling have environmentally determined sex. The in situ nest mean hatchling sex ratios (SR) were highly femalebiased: loggerhead F=0.89) and green turtle F=0.81; leatherback's SR was nearly balanced (0.55F). Nest temperatures and SRs differed between leatherbacks and loggerhead and green turtles. The latter two did not differ. The loggerhead response parameters were estimated within biological limitations by both 50-65% of incubation and mean middle 1/3 temperature. The maximum middle 1/3 temperature was the best-fit predictor for green turtles. No best-fit sex ratio-temperature response could be identified for leatherbacks. Clutches incubating under natural conditions can vary greatly in SR; TRT differences may account for differences among species' sex ratios.

Indexing (document details)
Advisor: Wyneken, Jeanette
Commitee: Milton, Sarah, Murphey, Rodney K., Noonburg, Erik, Perry, Gary W., Rosson, Barry T.
School: Florida Atlantic University
Department: Biological Sciences
School Location: United States -- Florida
Source: MAI 52/01M(E), Masters Abstracts International
Subjects: Wildlife Conservation, Zoology
Publication Number: 1523458
ISBN: 978-1-303-22728-8
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