... can vary depending on diving behaviour, such as the depth of dives and dive duration. However, in aquatic reptiles, the variation in heart rate during deep dives under natural conditions has not been fully investigated. In this study, we released five loggerhead sea turtles ( Caretta caretta...

... of this response in aquatic reptiles, including sea turtles, remains under debate. Using the parasympathetic blocker atropine, we evaluated the involvement of the parasympathetic nervous system in heart rate reduction of loggerhead sea turtles ( Caretta caretta ) during voluntary diving in tanks. The heart rate...

... http://www.biologists.com/user-licence-1-1/ Highlighted Article: Heart rates of undisturbed loggerhead sea turtles were not different whether turtles were submerged or out of water. Rather, heart rates changes were driven by turtles' activity level. ECG Caretta caretta...

...: Active dives of juvenile loggerhead turtles in the western North Pacific during the winter period are driven by a high resting metabolic rate. Respirometry Body temperature Diving behaviour Overwintering strategy Satellite tracking Caretta caretta Ambient temperature is one...

... energy, thus decreasing the likelihood of survival. In this study hatchlings were run on a treadmill for 200 or 500 m to investigate the physiological impacts of disorientation crawling in loggerhead ( Caretta caretta ) and green ( Chelonia mydas ) sea turtle hatchlings. Oxygen consumption, lactate...

... an interdisciplinary approach in which we first conducted lab-based experiments to determine how hatchling loggerhead sea turtles ( Caretta caretta ) respond to magnetic fields that exist at five widely separated locations along their migratory route, and then studied the consequences of the observed behavior...

...Matthew J. Fuxjager; Brian S. Eastwood; Kenneth J. Lohmann SUMMARY Young loggerhead sea turtles ( Caretta caretta ) from the east coast of Florida, USA, undertake a transoceanic migration around the North Atlantic Gyre, the circular current system that flows around the Sargasso Sea. Previous...

... ability both at the surface and underwater, fine-scale 3-D movements of free-ranging loggerhead turtles Caretta caretta were reconstructed by using multi-sensor data loggers. Video systems (‘Crittercam’) were also used to record the behaviour of the turtles and the visual information surrounding...

.... * Author for correspondence (e-mail: [email protected] ) 17 2 2004 © The Company of Biologists Limited 2004 2004 sea turtle orientation navigation migration map loggerhead green turtle Caretta caretta Chelonia mydas After a period of years spent in the pelagic...

...Larisa Avens; Kenneth J. Lohmann SUMMARY Although the orientation cues used by hatchling sea turtles have been studied extensively, little is known about the mechanisms of orientation and navigation that guide older turtles. To investigate the orientation cues used by juvenile loggerheads Caretta...

...William P. Irwin; Kenneth J. Lohmann SUMMARY 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...

...Shingo Minamikawa; Yasuhiko Naito; Katsufumi Sato; Yoshimasa Matsuzawa; Takeharu Bando; Wataru Sakamoto ABSTRACT Time-series data of swimming speed and dive depth were recorded in six female loggerhead turtles Caretta caretta during the internesting period. The dive profiles of all animals...

...Kenneth J. Lohmann; Catherine M. F. Lohmann ABSTRACT Loggerhead sea turtle hatchlings ( Caretta caretta L.) emerge from underground nests, scramble to the sea and begin a transoceanic migration by swimming away from their natal beach and into the open ocean. Evidence suggests that hatchlings...

... water. To determine whether loggerhead ( Caretta caretta L.) and green turtle ( Chelonia mydas L.) hatchlings can detect wave direction in this way, we constructed a wave motion simulator to reproduce in air the circular movements that occur beneath small ocean waves. Hatchlings suspended in air...

... animal. We studied the magnetic orientation behavior of hatchling loggerhead sea turtles ( Caretta caretta L.) exposed to earth-strength magnetic fields of different inclinations. Hatchlings exposed to the natural field of their natal beach swam eastward, as they normally do during their offshore...

...Kenneth J. Lohmann; Catherine M. Fittinghoff Lohmann ABSTRACT During their natal migration, hatchling loggerhead sea turtles ( Caretta caretta L.) establish courses towards the open ocean and maintain them after swimming beyond sight of land. Laboratory experiments have demonstrated that swimming...

... of loggerheads is an inclination (axial) compass, functionally similar to that of birds. * To whom reprint requests should be addressed. 10 05 1993 © 1993 by Company of Biologists 1993 magnetic magnetoreception orientation sea turtle Caretta caretta Sea turtle...

...Kenneth J. Lohmann ABSTRACT 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...