Loggerhead turtle is an endangered sea turtle species with a migratory lifestyle and worldwide distribution, experiencing markedly different habitats throughout its lifetime. Environmental conditions, especially food availability and temperature, constrain the acquisition and the use of available energy, thus affecting physiological processes such as growth, maturation, and reproduction. These ...

ETWEEN 1947 AND 1962, the population of the United States grew at an average annual rate near 2 percent, a large increase from the average annual growth rate near 1 percent during the 20 years prior to World War II. Moreover, since 1962, the average population growth rate has fallen to its pre-war level. This large but temporary increase in the population growth rate, more familiarly called the...

Turtles are more than just animals with shells. They have important jobs in nature, eating and being eaten by other living things. Tropical Asia is a biodiversity hotspot for turtles—more than one quarter of all turtle species on Earth are found here. Some sad news is that turtles are going extinct because of humans hunting the turtles and destroying their habitats. This situation has been name...

This protocol describes how to incubate painted turtle eggs and collect embryos for gene expression analysis. The same basic protocol can be used to incubate eggs and collect embryos from other turtle species by modifying the incubation temperature to suit the particular developmental needs of each species.

Specimens of the turtle barnacle Cylindrolepas sinica Ren, 1980 were collected from sea turtles in Japanese waters. The specimens were hexagonal in shape and were found burrowing into the sea turtle plastron. Specimens were dissected and the hard and soft parts were compared with the original description.

The Peirópolis paleontological site (Late Cretaceous, Maastrichtian) in Minas Gerais State, Brazil yielded an important assemblage of fossil vertebrates. The typical occurrence of South American widespread taxa in Peirópolis is important for correlation between the Brazilian Bauru Basin and Argentinean Late Cretaceous basins. The fishes, turtles, anuran, crocodilians and dinosaurs known from Pe...

Chimeras are useful models for studies of developmental biology and cell differentiation. Intraspecies and interspecies germline chimeras have been produced in previous studies, but the feasibility of producing chimeras between animals of two different classes remains unclear. To address this issue, we attempted to produce chimeras between the Chinese soft-shelled turtle and the Peking duck by ...

L-systems are extremely simple algorithms: Visualize a turtle moving a distance d straight forward. At the end of its journey it produces two offspring, one branching of slightly to the left and the second branching off slightly to the right, and both traveling a 10% shorter distance. Once the offspring reach their destination each creates two offspring which branch off slightly to the left and...

Wind tunnel tests were performed to measure the effect of a satellite transmitter on a juvenile green turtle (Chelonia mydas). A full-scale turtle model was constructed from an 11.5 kg specimen with a 48 cm carapace length, and a transmitter model was constructed from a Telonics ST-6. The turtle model was tested in a wind tunnel with and without the transmitter, which was mounted on the forward...

BACKGROUND Consumption of turtles by natives and settlers in the Amazon and Orinoco has been widely studied in scientific communities. Accepted cultural customs and the local dietary and monetary needs need to be taken into account in conservation programs, and when implementing federal laws related to consumption and fishing methods. This study was conducted around the Purus River, a region kn...