... buoyancy in lentic environments, but maintained buoyancy closer to neutral in lotic environments to optimise their locomotion. Swimming behaviour Gliding Buoyancy Physostome Data logger Accelerometry Some swimming animals exhibit undulating vertical movements, employing intermittent...

...Katsufumi Sato To investigate the thermal characteristics of large reptiles living in water, temperature data were continuously recorded from 16 free-ranging loggerhead turtles, Caretta caretta , during internesting periods using data loggers. Core body temperatures were 0.7–1.7°C higher than...

... by translocating three seals and recording their heading direction continuously using GPS, and acceleration and geomagnetic data loggers while they returned to the colony. The seals first reached the coast and then proceeded to the colony by swimming along the coast. While underwater the animals exhibited...

...@nipr.ac.jp ) 7 10 2010 © 2011. 2011 accelerometer blue-eyed shag data logger flight speed GPS tracking power curve Air and water have drastically different physical properties, and hence animals capable of moving in both media are expected to face evolutionary trade-offs...

... acceleration, along the long axis of the body, were used to calculate the pitch angle of the animal( Sato et al., 2003 ). Acceleration data loggers (M190L-D2GT; Little Leonardo Ltd, Tokyo, Japan)were used to obtain detailed information on foraging activity over a 24 h period (maximum 28.2 h because...

...-density lipid and higher-density lean tissue) varies individually and seasonally,their buoyancy also fluctuates widely, and individuals would be expected to adjust their stroke patterns during dives accordingly. To test this prediction, we attached acceleration data loggers to four free-ranging Baikal...

.... To understand how poorly insulated diving endotherms survive the Arctic winter, we performed year-round recordings of heart rate,dive depth and abdominal temperature in male great cormorants using miniature data loggers. We also examined the body composition of individuals in the spring. Abdominal temperatures...

... ice holes. Data loggers were deployed on the penguins to monitor under water behavior. Nine instrumented penguins performed 386 leaps from the holes during experiments. The maximum swim speeds within 1 s before the exits through the holes correlated significantly with the above-water height...

... foraging. However, empirical data indicate that the body angles of some diving animals are rarely vertical during descent and ascent. Why do they choose shallower body angles that result in longer descent and ascent durations? To investigate this question, we attached acceleration data loggers to eight...

...Katsufumi Sato; Y. Naito; A. Kato; Y. Niizuma; Y. Watanuki; J. B. Charrassin; C.-A. Bost; Y. Handrich; Y. Le Maho SUMMARY Using a newly developed data logger to measure acceleration, we demonstrate that free-ranging king and Adélie penguins only beat their flippers substantially during the first...

... auritus heart rate behaviour depth carotid body chemoreceptor blood gas data logger cardiac control mechanism. Cormorants and shags are foot-propelled pursuit divers ( Ashmole, 1971 ), which were generally considered to perform shallow dives of short duration ( Cooper, 1986 ; Johnsgard...

..., Minabe, Wakayama Prefecture, Japan, during June and July 1995 and 1996 ( Fig. 1 ). We attached data loggers to nine female turtles after they had laid eggs and obtained the data from six individuals when they subsequently returned to the beach. We named these turtles 9501 (straight carapace length, SCL...

... diving. * e-mail: southwoo@zoology.ubc.ca 17 02 1999 06 04 1999 © 1999 by Company of Biologists 1999 heart rate diving sea turtle leatherback turtle Dermochelys coriacea reptile data logger behavior The leatherback sea turtle ( Dermochelys coriacea...

... to make repetitive, long-duration dives. Seven juvenile northern elephant seals were captured at Año Nuevo, CA, instrumented and translocated to release sites around Monterey Bay. Heart rate and dive depth were recorded using custom-designed data loggers and analogue tape monitors during the seals’ return...