A cytophotometric analysis of the structure of hypothalamic cell populations in the frog,Rana temporaria (L.), with special reference to seasonal changes in chromatin status

1988 ◽  
Vol 88 (3-6) ◽  
pp. 629-636 ◽  
Author(s):  
V. K. Chetverukhin ◽  
G. V. Selivanova ◽  
L. S. Onischenko ◽  
T. D. Vlasova ◽  
A. L. Polenov
Keyword(s):  
Special Reference ◽  
Seasonal Changes ◽  
Rana Temporaria ◽  
Cell Populations ◽  
Frog Rana Temporaria ◽  
Cytophotometric Analysis

Seasonal changes in endocrine organs of the male common frog, Rana temporaria

1968 ◽  
Vol 91 (1) ◽  
pp. 96-111 ◽  
Author(s):  
J. A. M. Kemenade ◽  
W. J. Dongen ◽  
P. G. W. J. Oordt
Keyword(s):  
Seasonal Changes ◽  
Rana Temporaria ◽  
Common Frog ◽  
Endocrine Organs ◽  
Frog Rana Temporaria

Seasonal changes in endocrine organs of the male common frog,Rana temporaria

1968 ◽  
Vol 88 (4) ◽  
pp. 549-559 ◽  
Author(s):  
P. G. W. J. Oordt ◽  
W. J. Dongen ◽  
B. Lofts
Keyword(s):  
Seasonal Changes ◽  
Rana Temporaria ◽  
Common Frog ◽  
Endocrine Organs ◽  
Frog Rana Temporaria

Seasonal Changes in Blood Sugar, Fat Body, Liver Glycogen, and Gonads in the Common Frog, Rana Temporaria

1950 ◽  
Vol 26 (4) ◽  
pp. 412-429 ◽  
Author(s):  
C. L. SMITH
Keyword(s):  
Blood Sugar ◽  
Seasonal Changes ◽  
Fat Body ◽  
Rana Temporaria ◽  
Rapid Development ◽  
Liver Glycogen ◽  
Glycogen Storage ◽  
Spawning Season ◽  
Dominant Feature ◽  
Frog Rana Temporaria

1. Seasonal changes in the weights of fat body, gonads and liver, liver-glycogen content, and blood sugar have been followed by observations on monthly samples of Rana temporaria which had been kept in captivity for 3 days without food. 2. Three periods during which the blood sugar was high (from 54 to 62 mg./100 ml. of blood) were observed during the year: at the spawning season in March, in June and July, and in November. 3. The hyperglycaemia of June and July was accompanied by the rapid development of the fat body. This phase was succeeded by that of gonad regeneration, during which there was no further storage of fat or liver glycogen, and the blood sugar was low (about 40 mg./100 ml. of blood). 4. When gonad regeneration was nearing completion glycogen storage in the liver became the dominant feature, and the blood sugar tended to rise again. 5. A sex difference in blood sugar was observed at certain periods. From June to September the female blood sugar was higher than that of the male, but from September to January the relationship was reversed. This may be correlated with the differing rates of gonad regeneration in the two sexes. 6. During the winter months, when the food intake was reduced, the frogs utilized some of their stored fat and glycogen and the blood sugar was low (about 40 mg./100 ml.). The hyperglycaemia found at the spawning season was accompanied by the rapid depletion of the fat and glycogen stores. 7. In April and May, after the breeding season, when the frogs were feeding actively, the blood sugar was low and apparently neither fat nor glycogen was being accumulated. It is suggested that this was a period of tissue repair and possibly of growth.

The First Record of Tesselated Snake, Natrix tesselata Laurenti, 1768 in the Central Chernozem Territory of Russia and Some Other Results of the Herpetological Research in the Upper Don

2011 ◽  
Vol 4 (2) ◽  
pp. 192-194
Author(s):  
Georgy A. Lada ◽  
V. Y. Nedosekin
Keyword(s):  
Rana Temporaria ◽  
First Record ◽  
Isolated Population ◽  
Common Frog ◽  
Northern Border ◽  
Frog Rana Temporaria ◽  
Bombina Bombina ◽  
Central Chernozem

A small isolated population of tesselated snake, Natrix tesselata was found in the Upper Don (Lipetsk Region, Russia). It is the first record of this species in the Central Chernozem Territory of Russia, which is separated from the northern border of the main range by the distance of about 200 km. An isolated population of common frog, Rana temporaria and phenetically peculiar population of fire-bellied toad, Bombina bombina are found here too. Faunistic aspect of new herpetological records is discussed.

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