Showing papers on "Geoemydidae published in 2010"
TL;DR: Results indicate that M. japonica has a mechanism of temperature-dependent sex determination (TSD) with higher temperatures favoring females and lower temperatures males as in several other species of the family Geoemydidae, as well as of a few other testudine families so far studied.
Abstract: We investigated the effect of incubation temperature on hatchling sex in the Japanese pond turtle, Mauremys japonica. Eggs obtained from females collected in the Tokai District of Japan invariably produced males when incubated at constant temperatures from 22.0 to 28.0 C, whereas they produced only females under a higher temperature of 30.0 C. Both males and females hatched from eggs incubated at 28.5, 29.0, and 29.5 C. These results indicate that M. japonica has a mechanism of temperature-dependent sex determination (TSD) with higher temperatures favoring females and lower temperatures males as in several other species of the family Geoemydidae, as well as of a few other testudine families so far studied. The pivotal temperature and the transitional range of temperature (TRT) in M. japonica obtained by the inverse estimation from logistic regression were 28.8 C and from 27.8–29.8 C, respectively. Possible effect of TSD on the sex ratio observed in some wild populations of this turtle is discussed.
13 citations
01 Jan 2010
TL;DR: The existence of this species is validated by reporting the first specimen and some additional information on the timing and possible purpose of its introduction into the country is provided.
Abstract: During a recent herpetological survey in Timor-Leste we discovered a specimen of the Chinese Pond Turtle (Mauremys reevesii) in the ornamental pond belonging to a hotel in Baucau, the country's second-largest city. The specimen was secured by the hotel's owner in 2008 in a banana grove at Becora near Dili, the capital city of Timor-Leste, and kept as a pet. Several other sightings and anecdotal evidence confirm that this species has lived in the eastern part of Timor Island for at least two decades. In this paper, we validate the existence of this species by reporting the first specimen and we provide some additional information on the timing and possible purpose of its introduction into the country.
7 citations