...Donald C. Jackson ABSTRACT Lactate concentrations were measured in the shell and plasma of the turtle Chrysemys picta bellii after 3 months of submergence anoxia at 3 °C and during and after 9 days of submergence anoxia at 10 °C. Liver and skeletal muscle lactate levels were also measured...

... and dipping the beak, to head only submersion, to full dives, when they became completely submerged. The average response of the ducklings to all voluntary beak dipping and head submersion before first-ever whole-body dives were performed is given in Table 1 . The duration of beak dips was always very...

..., then peripheral chemoreceptors appear to affect heart rate in diving ducks. Heart rate is elevated in ducks (Aythya fuligula) in which the carotid body has been denervated, compared with intact ducks, after 50 s or so of forced submergence ( Butler & Woakes, 1982 ). The purpose of the present study...

...G. R. Gabbott; D. R. Jones ABSTRACT Bradycardia in response to forced submergence was habituated in dabbling (Anas platyrhynchos , Linnaeus) and diving (Aythya americana , Eyton) ducks by repetitively submerging the animals, each day for several days, for periods of 40 and 20 s, respectively...

...R. A. Furilla; David R. Jones ABSTRACT In restrained redhead ducks, forced submergence caused heart rate to fall from 100 ± 3 beats min −1 (mean± S.E.M., N = 12) to a stable underwater rate of 35 ± 4 beats min −1 ( N = 12) within 5 s after submergence. Bradycardia was unaffected by breathing oxygen...