Postcranial myology of the California newt,Taricha torosa

2005 ◽  
Vol 288A (1) ◽  
pp. 46-57 ◽  
Author(s):  
Julia C. Walthall ◽  
Miriam A. Ashley-Ross
Keyword(s):  
Taricha Torosa

Effects of Solar UV-B Radiation on Embryonic Development in Hyla cadaverina, Hyla regilla, and Taricha torosa

1998 ◽  
Vol 12 (3) ◽  
pp. 646-653 ◽  
Author(s):  
Christopher R. Anzalone ◽  
Lee B. Kats ◽  
Malcolm S. Gordon
Keyword(s):  
Embryonic Development ◽  
Hyla Regilla ◽  
Taricha Torosa ◽  
Solar Uv

A Study of Nuclei and Intercellular Ground Substance during the in situ Differentiation of Somites in Taricha torosa

Development ◽  
1961 ◽  
Vol 9 (4) ◽  
pp. 650-660
Author(s):  
Cyril V. Finnegan
Keyword(s):  
Morphological Changes ◽  
Periodic Acid ◽  
Ground Substance ◽  
Tail Bud ◽  
Interphase Nuclei ◽  
Taricha Torosa ◽  
Intercellular Matrix ◽  
Schiff Reagent

In order better to evaluate results obtained in this laboratory concerning the responses of differentiating postneurula somite tissue to other mesoderm tissue placed in its immediate vicinity (Finnegan, unpublished), it was necessary to examine somite differentiation in situ. A qualitative examination of somite interphase nuclei of tail-bud and later stages was performed to note their morphological changes since it was assumed, as suggested by Briggs & King (1955), that such changes indicate cellular differentiation and, conversely, that absence of such changes indicates that the cells are not actively differentiating. Because of the possible role of the intercellular matrix in histogenesis (see Grobstein, 1954, 1959; and Edds, 1958) a study was made of the development in the somite of that portion of the intercellular matrix which is demonstrable histochemically with the periodic acid-Schirf (PAS) technique. The visual clarity of the results has been materially aided by the fluorescent Schiff reagent of Culling & Vassar (1961) which makes possible a fluorescent Feulgen and a fluorescent PAS reaction.

Water balance in the California newt, Taricha torosa

1980 ◽  
Vol 238 (1) ◽  
pp. R113-R118 ◽  
Author(s):  
S. C. Brown ◽  
P. S. Brown
Keyword(s):  
Body Weight ◽  
Glomerular Filtration Rate ◽  
Water Balance ◽  
Filtration Rate ◽  
Water Movement ◽  
Arginine Vasotocin ◽  
Taricha Torosa ◽  
Physiological Adaptations ◽  
Weight Gains ◽  
Access To Water

Both dehydration to 87% of original body weight (Wo) and arginine vasotocin (AVT: 20 mU/g) elicited rapid weight gains (ca. 9% of Wo in the 1st h) when terrestrial-phase T. torosa were given access to water. In each case, net weight gain resulted from increased integumental osmosis and antidiuresis. Mesotocin (0.001 -- 0.1 micrograms/g) elicited modest but significant weight gains (ca. 1%/h) caused solely by increased integumental osmosis. Integumental water uptake from wet moss was 66% that of totally immersed animals. Water movement from ventral to dorsal body surface occurred along channels on the skin. Urinary bladder storage capacities in excess of 50% of Wo were observed. Following AVT administration, bladder water resorption increased significantly, while glomerular filtration rate dropped to 16% of control values. The structural and physiological adaptations for water balance in T. torosa are comparable to those found in some terrestrial anurans.

Responses of metamorphosing Taricha torosa to x rays

1974 ◽  
Vol 52 (6) ◽  
pp. 671-676
Author(s):  
H. M. McCurdy ◽  
F. T. Algard ◽  
G. B. Friedmann
Keyword(s):  
Single Dose ◽  
Sample Population ◽  
X Rays ◽  
Larval Form ◽  
Triggering Mechanism ◽  
Pigment Pattern ◽  
Taricha Torosa ◽  
Complete Metamorphosis

A single dose of 1000 rads of x rays administered to metamorphosing Taricha torosa larvae interferes selectively with some elements of the metamorphosing process without, apparently, affecting any major triggering mechanism. Though the predominant result is a failure to complete metamorphosis, metamorphosed irradiates showing larval pigmentation, vestigial gills, and non-protuberant eyes have been observed. Arrest of the normal thickening of the epidermis during metamorphosis and of the associated development of the epidermal melanophores is followed by regression of the pigment pattern to the larval form. This 1000-rad dose appears to kill half of a sample population in 30 days. A single dose of 200 rads, while allowing completion of metamorphosis, is fatal within some 3 months. The metamorphosed animals show predominantly adult characteristics.

The Use of Conspecific Chemical Cues for Cannibal Avoidance in California Newts (Taricha torosa)

Ethology ◽  
2010 ◽  
Vol 95 (3) ◽  
pp. 186-192 ◽  
Author(s):  
Sean A. Elliott ◽  
Lee B. Kats ◽  
Jennifer A. Breeding
Keyword(s):  
Chemical Cues ◽  
Taricha Torosa
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