Hatchling sex ratios and nest temperature-sex ratio response of three South Florida marine turtle species (Caretta caretta L., Chelona mydas L., and Dermochelys coriacea V.)

Date Issued:: 2013
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 female-biased : 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.

Title:	Hatchling sex ratios and nest temperature-sex ratio response of three South Florida marine turtle species (Caretta caretta L., Chelona mydas L., and Dermochelys coriacea V.).	191 views 46 downloads
Name(s):	Rogers, Micah Marie. Charles E. Schmidt College of Science Department of Biological Sciences
Type of Resource:	text
Genre:	Electronic Thesis Or Dissertation
Date Issued:	2013
Publisher:	Florida Atlantic University
Physical Form:	electronic
Extent:	x, 103 p. : ill.
Language(s):	English
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 female-biased : 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.
Identifier:	852502218 (oclc), 3361062 (digitool), FADT3361062 (IID), fau:4143 (fedora)
Note(s):	by Micah Marie Rogers. Thesis (M.S.)--Florida Atlantic University, 2013. Includes bibliography. Mode of access: World Wide Web. System requirements: Adobe Reader.
Subject(s):	Sex ratio Sex determination, Genetic Sea turtles -- Nests -- United States -- Florida Sea turtles -- Embryology Loggerhead turtle -- Nests -- United States -- Florida Loggerhead turtle -- Effect of temperature on
Persistent Link to This Record:	http://purl.flvc.org/fcla/dt/3361062
Use and Reproduction:	http://rightsstatements.org/vocab/InC/1.0/
Host Institution:	FAU

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Hatchling sex ratios and nest temperature-sex ratio response of three South Florida marine turtle species (Caretta caretta L., Chelona mydas L., and Dermochelys coriacea V.)

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