Estimating hatchling sex ratios of loggerhead turtles in Cyprus from incubation duration
نویسندگان
چکیده
منابع مشابه
Magnetic Orientation by Hatchling Loggerhead Sea Turtles
Laboratory experiments were conducted to test the ability of loggerhead sea turtle hatchlings (Caretta caretta L.) to orient using the magnetic field of the earth. Hatchlings were tethered to a rotatable lever-arm apparatus which tracked swimming orientation in complete darkness. Hatchlings tested in the earth's magnetic field were nonrandomly oriented with a mean angle of 42°; those tested und...
متن کاملThe effects of incubation environment, sex and pedigree on the hatchling phenotype in a natural population of loggerhead turtles
Explaining environmental sex determination (when offspring sex is determined by a property of the embryonic environment) in reptiles remains one of the greatest problems in the field of sex allocation. We test Charnov and Bull’s differential fitness hypothesis in a natural population of loggerhead sea turtles in the field. This hypothesis states that the embryonic environment affects a trait th...
متن کاملMagnet-induced disorientation in hatchling loggerhead sea turtles.
Laboratory experiments have indicated that hatchling loggerhead sea turtles (Caretta caretta) are able to establish and maintain courses using information from the Earth's magnetic field. In previous experiments, turtles were tested in relatively uniform magnetic fields generated by large coil systems surrounding an orientation arena. In this study, we investigated the orientation behavior of h...
متن کاملThe magnetic map of hatchling loggerhead sea turtles.
Young loggerhead sea turtles (Caretta caretta) from eastern Florida, U.S.A., undertake a transoceanic migration in which they gradually circle the North Atlantic Ocean before returning to the North American coast. Hatchlings in the open sea are guided at least partly by a 'magnetic map' in which regional magnetic fields function as navigational markers and elicit changes in swimming direction a...
متن کاملExperimental assessment of the effects of moisture on loggerhead sea turtle hatchling sex ratios.
Many reptiles have temperature-dependent sex determination (TSD). Sex determination in marine turtles is described by a cool-male, warm-female pattern. Nest sand temperature strongly influences sea turtle embryo development and sex differentiation. Yet, variation in hatchling sex ratios is explained only partially by nest temperature and can be predicted only at the warmest and coolest temperat...
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ژورنال
عنوان ژورنال: Marine Ecology Progress Series
سال: 2001
ISSN: 0171-8630,1616-1599
DOI: 10.3354/meps210195