...Brian P. Schmidt; Jeffrey M. Knowles; Andrea Megela Simmons SUMMARY Current flow is an important biological stimulus for larval anuran amphibians, but little is known about how it is perceived. We quantified behavioral responses to controlled water flow in the bullfrog tadpole ( Rana catesbeiana...

... occurring population of Rana catesbeiana. Comp. Biochem. Physiol. 50A , 709 -715. Carey, C. ( 1979 ). Aerobic and anaerobic energy expenditure during rest and activity in montane Bufo b. boreas and Rana pipiens. Oecologia 39 , 213 -228. Connett, R. J. ( 1979 ). Glyconeogenesis from...

...Y. L. Werner; J. Pylka; H. Schneider; M. Seifan; W. Walkowiak; U. Werner-Reiss SUMMARY The dimorphic ear of the bullfrog, Rana catesbeiana , has long been enigmatic. The male's tympanic membrane (TM) area approximates twice the area of the female's; however, similar size differences in the area...

.... To address this issue, we used in vitro brainstem preparations of an ectotherm, Rana catesbeiana ,at three developmental stages: pre-metamorphic tadpoles, metamorphic tadpoles and fully mature adult bullfrogs. We first compared the effects of NA bath application (0.02-10 μmol l -1 ) on brainstem preparations...

...Douglas Lee Clark; Susan E. Peters SUMMARY It has been shown in the bullfrog, Rana catesbeiana Shaw 1802,that certain forelimb muscles in males have different contractile properties when compared with females, which may result from adaptation for amplexus. We extended this study to a distantly...

... [Ca 2+ ] i and survival of a mixed population of isolated cells from the forebrain of North American bullfrog Rana catesbeiana tadpoles. Forebrain cells from stage V-XV tadpoles were isolated by enzymatic digestion and loaded with one of three different calcium indicators (Fura-2, Fura 2-FF and BTC...

... to low oxygen. * Author for correspondence (e-mail: [email protected] ) 17 11 2004 © The Company of Biologists Limited 2005 2005 amphibian bullfrog Rana catesbeiana development tadpole respiratory rhythm generation iodoacetate Many ectothermic vertebrates...

...: Oregon State University, Zoology Department, 3029 Cordley Hall, Corvallis, OR 97331, USA (e-mail: [email protected] ) 10 4 2003 © The Company of Biologists Limited 2003 2003 locomotion muscle work muscle power jumping frog Rana catesbeiana elastic tendon acceleration...

... for correspondence (e-mail: [email protected] ) 13 1 2003 © The Company of Biologists Limited 2003 2003 growth hormone prolactin amphibian metamorphosis non-selective cation channel bullfrog skin Rana catesbeiana In the bullfrog tadpole, the short-circuit current (SCC...

...Matthew J. Mason; Peter M. Narins SUMMARY Laser vibrometry was used to measure the vibration velocity at different points on the ossicular apparatus of the bullfrog Rana catesbeiana in response to free-field sound. The ascending process of the extrastapes,neglected in most accounts of frog middle...

... for correspondence at present address: Department of Zoology, Downing Street, Cambridge CB2 3EJ, UK (e-mail: [email protected] ) 15 7 2002 © The Company of Biologists Limited 2002 2002 middle ear bullfrog Rana catesbeiana laser Doppler vibrometry operculum stapes hearing...

...Lise Broch; Rey D. Morales; Anthony V. Sandoval; Michael S. Hedrick SUMMARY Isolated brainstem preparations from larval (tadpole) and adult Rana catesbeiana were used to examine inhibitory mechanisms for developmental regulation of the respiratory central pattern generator (CPG). Preparations were...

... ). Tonic vagal influences on inspiratory duration. Respir. Physiol . 24 , 287 –302. De Jongh, H. J. and Gans, C. ( 1969 ). On the mechanism of respiration in the bullfrog, Rana catesbeiana : a reassessment. J. Morphol . 127 , 259 –290. De Marneffe-Foulon, C. ( 1962 ). Contribution à...

...J. N. Stinner; L. K. Hartzler ABSTRACT The aim of this study was to determine the effects of temperature upon pH, protein charge and acid–base-relevant ion exchange in air-breathing ectotherms. Plasma and skeletal muscles in cane toads ( Bufo marinus ) and bullfrogs ( Rana catesbeiana ) were...

...John M. Olson; Richard L. Marsh ABSTRACT We measured the electromyographic (EMG) activity of seven hindlimb muscles during jumping in the bullfrog Rana catesbeiana . The semimembranosus, gracilis major, gluteus magnus, adductor magnus, cruralis and plantaris longus were consistently active...

... tail fin from 6–10 Rana catesbeiana tadpoles to establish the fin’s viscoelastic properties under (1) large-deformation cyclic loading at 1 and 3 Hz, (2) small-deformation forced vibration at 1 and 3 Hz, and (3) stress relaxation under a 0.1 s loading time. The fin was very fragile, failing easily...

...Priscila L. Rocha; Luiz G. S. Branco ABSTRACT We assessed seasonal variations in the effects of temperature on hypoxia-induced alterations in the bullfrog Rana catesbeiana by measuring the heart rate, arterial blood pressure, breathing frequency, metabolic rate, blood gas levels, acid–base status...

...Thomas Cox ABSTRACT The skin of the bullfrog Rana catesbeiana tadpole contains an apical non-selective cation channel that is activated by amiloride. This is in contrast to the adult skin, which has a highly Na + -selective channel that is blocked by amiloride. The purpose of the present study...

...L. W. Kline; M. L. Zhang; P. K. T. Pang ABSTRACT Cholecystokinin octapeptide (CCK), acetylcholine (ACh) and ceruletide have been shown to produce contraction in bullfrog ( Rana catesbeiana ) gallbladder strips. Agents capable of relaxing the bullfrog gallbladder are less numerous. Calcitonin gene...

...Morten Busk; Erik Hviid Larsen; Frank B. Jensen ABSTRACT Tadpoles of Rana catesbeiana were exposed to different levels of environmental hypercapnia. The acid–base regulatory response differed from that in adult amphibians in showing a high degree of pH compensation in the extracellular fluid (65–85...