Temperature and the Balance between Aerial and Aquatic Respiration in Larvae of Rana berlandieri and Rana catesbeiana

1983 ◽  
Vol 56 (2) ◽  
pp. 263-273 ◽  
Author(s):  
Warren W. Burggren ◽  
Martin E. Feder ◽  
Alan W. Pinder
Keyword(s):  
Rana Catesbeiana ◽  
Aquatic Respiration ◽  
Rana Berlandieri

scholarly journals The effects of aquatic oxygen concentration, body size and respiratory behaviour on the stamina of obligate aquatic (Bufo americanus) and facultative air-breathing (Xenopus laevis and Rana berlandieri) anuran larvae

1983 ◽  
Vol 105 (1) ◽  
pp. 173-190
Author(s):  
R. J. Wassersug ◽  
M. E. Feder
Keyword(s):  
Body Size ◽  
Xenopus Laevis ◽  
Oxygen Concentration ◽  
Interspecific Variation ◽  
Bufo Americanus ◽  
Aquatic Respiration ◽  
Rana Berlandieri ◽  
Hypoxic Water ◽  
Large Animals ◽  
The Relationship

Larvae of the anurans Rana berlandieri and Xenopus laevis have lungs and can breathe air as well as irrigate buccal and pharyngeal surfaces for aquatic respiration. Larvae of Bufo americanus lack lungs until just before metamorphosis and are obligately aquatic. We examined the relationship between the locomotor stamina (time to fatigue), aquatic oxygen concentration, body size, and respiratory behaviour of swimming larvae of these species, with the following results: Stamina is size-dependent in all three species. Aquatic hypoxia reduces stamina in larvae of all three species, but most conspicuously in Bufo. Breathing air increases stamina in Rana larvae, especially in large animals and under aquatic hypoxia. In contrast to Rana larvae, Xenopus larvae swimming in normoxic water undergo a reduction in stamina when allowed to breathe air. In hypoxic water, aerial respiration moderates the reduction in stamina seen in Xenopus larvae. Branchial irrigation is associated with increased stamina in Xenopus, and is increased under hypoxia and at high swimming velocities. Respiratory demand, buoyancy and the drag associated with branchial irrigation all affect respiratory behaviour in Xenopus larvae. The great amount of interspecific variation in the relationship between respiratory behaviour and stamina reveals the importance of measuring performance directly when attempting to interpret the functional significance of respiratory structures and behaviour.

Vesicular system associated with spermiogenesis of bullfrog

1987 ◽  
Vol 45 ◽  
pp. 818-819
Author(s):  
K. C. Liu ◽  
S. F. Tsay
Keyword(s):  
Electron Microscopy ◽  
Microscopic Study ◽  
Electron Microscopic Study ◽  
Reproductive System ◽  
Seminiferous Tubule ◽  
Rana Catesbeiana ◽  
Routine Procedure ◽  
Electron Microscopic ◽  
Twisted Tubules ◽  
Electron Lucent

In the histologic and electron microscopic study of the male reproductive system of bullfrog, Rana catesbeiana, a vesicular system associated with spermiogenesis was observed. It appeared in the lumenal space of the seminiferous tubule (Fig. 1), in the heads of spermatids (Fig. 2), associated with the chromatins of the spermatid (Fig. 4). As deduced from sections, this vesicular system consisted of vesicles of various size or a large group of waving and twisted tubules (Fig. 3), After routine procedure of treatment for electron microscopy, the lumens of both of the vesicles and tubules were electron lucent.In human, vesicles and vesicular system associated with reproductive cell and tissue were reported. In abnormal spermiogenesis, flower-like body, actually vesicles, and giant vesicle associated with the head of spermatid were observed. In both cases the number of vesicle was limited from a single one to a few.

Synergistic Cytotoxicity of Rana catesbeiana Ribonuclease and IFN-γ on Hepatoma Cells

2001 ◽  
Vol 280 (5) ◽  
pp. 1229-1236 ◽  
Author(s):  
Chih-Chi Andrew Hu ◽  
Yu-Hsiu Lee ◽  
Chih-Hang Anthony Tang ◽  
Jiin-Tsuey Cheng ◽  
Jaang-Jiun Wang
Keyword(s):  
Rana Catesbeiana ◽  
Hepatoma Cells ◽  
Synergistic Cytotoxicity ◽  
Ifn Γ

scholarly journals Phosphorylation of an inhibitory subunit of cGMP phosphodiesterase in Rana catesbeiana rod photoreceptors. I. Characterization of the phosphorylation.

1994 ◽  
Vol 269 (21) ◽  
pp. 15024-15029
Author(s):  
S. Tsuboi ◽  
H. Matsumoto ◽  
K.W. Jackson ◽  
K. Tsujimoto ◽  
T. Williams ◽  
...  
Keyword(s):  
Rana Catesbeiana ◽  
Rod Photoreceptors ◽  
Cgmp Phosphodiesterase

scholarly journals A Concerted Response of the Enzymes of Urea Biosynthesis during Thyroxine-induced Metamorphosis of Rana catesbeiana

1972 ◽  
Vol 247 (11) ◽  
pp. 3684-3692
Author(s):  
Robert L. Wixom ◽  
M. Kumudavalli Reddy ◽  
Philip P. Cohen
Keyword(s):  
Rana Catesbeiana
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