Results 171 to 180 of about 10,355 (218)

Rana catesbeiana Shaw, 1802 in Italy

1987
(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
Albertini, Giovanni, Lanza, Benedetto
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A study of hemoglobin differentiation in Rana catesbeiana

Developmental Biology, 1963
The hemoglobins of tadpole, metamorphosing tadpole, and frog (Rana catesbeiana) have been studied. Starch-gel electrophoresis has shown the presence of three hemoglobins in tadpoles and four different hemoglobins in frogs; metamorphosing tadpoles have both tadpole and frog hemoglobins.
C, BAGLIONI, C E, SPARKS
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Rana catesbeiana (Shaw) (Bullfrog) 2n = 26

1973
One pair of medium-sized submetacentric chromosomes has a prominent secondary constriction in the long arm. Another pair of medium-sized submetacentric chromosomes has a conspicuous secondary constriction in the short arm.
Maria Luiza Beçak, Willy Beçak, Franklin L. Roberts, Robert N. Shoffner, E. Peter Volpe   +4 more
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Plasma catecholamines with hemorrhage in the bullfrog,Rana catesbeiana

The Journal of Experimental Zoology, 1998
The concentrations of plasma epinephrine (E) and norepinephrin (N) measured at rest in bullfrogs (Rana catesbeiana) were 12.0 and 8.2 nmol liter-1 respectively: the ratio of [E]/[N] was 1.33 (+/- SE 0.35). Adrenal glands contained high concentrations of epinephrine (2,923 nmole g wet weight-1) and norepinephrine (6,194), at a ratio of 0.46 (+/- SE 0.04)
S, Hillman, P, Withers, P, Kimmel
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Chromosome studies of the lethal hybrid Rana pipiens ♀ × Rana catesbeiana ♂

Developmental Biology, 1969
Abstract Developmental arrest of amphibian interspecific hybrids about the time of gastrulation may be causally related to chromosomal breakage and loss during cleavage. This paper presents the karyotypes of white blood cells of adult Rana pipiens and Rana catesbeiana , and evidence that hybrids between Rana pipiens ♀ × Rana catesbeiana ...
James K. Reynhout, Donald L. Kimmel
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Anticipatory feeding behaviour in the bullfrog (Rana catesbeiana)

Animal Behaviour, 1967
Abstract The feeding behaviour in a laboratory colony of bullfrogs was studied by means of timelapse photography. It was found that the animals evidently anticipate the time and place of feeding, since they aggregate near the feeding site in advance.
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Territoriality in the Bullfrog, Rana catesbeiana

Copeia, 1968
During the breeding season, adult male bullfrogs, Rana catesbeiana, establish territories from which conspecific males are aggressively excluded. Stereotyped postures, approaches, and physical encounters all function in the defense of such areas.
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Auditory Sensitivity in the Tadpole (Rana catesbeiana)

The Journal of the Acoustical Society of America, 1973
Auditory sensitivity in six bullfrog tadpoles was investigated by electrophysiological techniques. Tonal stimulus intensities that generated a standard potential of 0.1 μV in the inner ear showed a hearing range from 100 to 4000 Hz with maximum sensitivity near 1 dyn/cm2 (0.1 N/m2) in the lower portion of the range.
B. A. Weiss, B. H. Stuart, W. F. Strother   +2 more
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Auditory Sensitivity in the Rana catesbeiana Tadpole

Journal of Herpetology, 1973
Auditory sensitivity in 6 bullfrog tadpoles (Rana catesbeiana) was investi- gated electrophysiologically. Tonal stimulus intensities that elicited a standard sensory potential of 0.1 ,v in the inner ear showed a response range from 100 Hz to 4000 Hz with maximum sensitivity near one dyne/cm2 (0.1 N/m2) in the lower portion of the range.
Burton A. Weiss, Bradley H. Stuart, William F. Strother   +2 more
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Tympanic sound radiation in the bullfrog Rana catesbeiana

Journal of Comparative Physiology A: Sensory, Neural, and Behavioral Physiology, 1997
Members of the Rana catesbeiana clade display sexually dimorphic eardrums. In this species assemblage the eardrum of males can be 50% larger than in females of the same body size. There has been, however, no apparent functional explanation for this dimorphism.
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