Seasonal changes in fine structure of the ductuli efferentes of the ground squirrel,Citellus lateralis (say)

1984 ◽  
Vol 208 (3) ◽  
pp. 383-399 ◽  
Author(s):  
Jeffrey Pundey ◽  
Don W. Fawcett
Keyword(s):  
Fine Structure ◽  
Seasonal Changes ◽  
Ground Squirrel ◽  
Ductuli Efferentes ◽  
Citellus Lateralis

scholarly journals Seasonal Changes in Spermatogenesis and Immunolocalization of Inhibin/Activin Subunits in the Wild Male Ground Squirrel (Citellus dauricus Brandt)

2008 ◽  
Vol 54 (6) ◽  
pp. 460-464 ◽  
Author(s):  
Xia SHENG ◽  
Haolin ZHANG ◽  
Wei ZHANG ◽  
Moshi SONG ◽  
Mengyuan ZHANG ◽  
...  
Keyword(s):  
Seasonal Changes ◽  
Ground Squirrel ◽  
Wild Male ◽  
In The Wild

scholarly journals Testicular expression of NGF, TrkA and p75 during seasonal spermatogenesis of the wild ground squirrel (Citellus dauricus Brandt)

2015 ◽  
Vol 59 (3) ◽  
Author(s):  
H. Zhang ◽  
Y. Wang ◽  
J. Zhang ◽  
L. Wang ◽  
Q. Li ◽  
...  
Keyword(s):  
Breeding Season ◽  
Sertoli Cells ◽  
Seasonal Changes ◽  
Ground Squirrel ◽  
Leydig Cells ◽  
Testicular Function ◽  
Nonbreeding Season ◽  
Function Change ◽  
The Mean ◽  
Neuronal Systems

The nerve growth factor (NGF) not only has an essential effect on the nervous system, but also plays an important role in a variety of non-neuronal systems, such as the reproductive system. The aim of this study was to investigate the seasonal changes in<strong> </strong>expression of NGF and its receptors (TrkA and p75) in testes of the wild ground squirrel during the breeding and nonbreeding seasons.<strong> </strong>Immunolocalization for NGF was detected mainly in Leydig cells and Sertoli cells in testes of the breeding and nonbreeding seasons. The immunoreactivity of TrkA was highest in the elongated spermatids, whereas p75 in spermatogonia and spermatocytes in testes of the breeding season. In the nonbreeding season testes, TrkA showed positive immunostainings in Leydig cells, spermatogonia and primary spermatocytes, while p75 showed positive signals in spermatogonia and primary spermatocytes. Consistent with the immunohistochemical results, the mean mRNA and protein level of NGF and TrkA were higher in the testes of the breeding season, and then decreased to a relatively low level in the nonbreeding season. In addition, the concentration of plasma gonadotropins and testosterone were assayed by radioimmunoassay (RIA), and the results showed a significant seasonal change between the breeding and nonbreeding seasons. To conclude, these results of this study provide the first evidence on the potential involvement of NGF and its receptor, TrkA and p75 in the seasonal spermatogenesis and testicular function change of the wild ground squirrel.

scholarly journals Control of plague vectors on diurnal rodents in the Sierra Nevada of California by use of insecticide bait-boxes

1960 ◽  
Vol 58 (3) ◽  
pp. 347-355 ◽  
Author(s):  
Allan M. Barnes ◽  
Leo Kartman
Keyword(s):  
Sierra Nevada ◽  
Host Species ◽  
Ground Squirrel ◽  
Ground Squirrels ◽  
Flea Species ◽  
Home Ranges ◽  
Sierra Nevada Mountains ◽  
Citellus Lateralis ◽  
Residual Control

Trials were conducted in the Sierra Nevada Mountains of California to test the effectiveness of 10% DDT dust in insecticide bait-box stations against the fleas of native diurnal rodents. The principle host species involved were the chipmunks Eutamias amoenus and E. speciosus, and the golden-mantled ground squirrel, Citellus lateralis. The important flea species were Monopsyllus eumolpi and M. ciliatus on chipmunks, and Diamanus montanus and Oropsylla idahoensis on ground squirrels. When baited daily for 12 days and furnished with 50 g. of 10% DDT dust, the bait-box stations reduced fleas strikingly within 24 hr., but very little residual control was obtained. A second application in which boxes were baited only twice weekly but for 28 days, also resulted in rapid knockdown and a residual control still effective 42 days after removal of the bait-boxes. The effect of the DDT was apparent at a distance of 400 ft. from the nearest bait-box due to the relatively extensive home ranges of the hosts. Although, in these trials, bait-box stations were spaced 100 ft. apart, 200 ft. spacing probably would be as effective with these hosts.

The fine structure of the adrenal cortex of the 13-lined ground squirrel

1968 ◽  
Vol 123 (2) ◽  
pp. 297-313 ◽  
Author(s):  
William G. Seliger ◽  
Wayne F. Smith
Keyword(s):  
Fine Structure ◽  
Adrenal Cortex ◽  
Ground Squirrel
Sign in / Sign up

Export Citation Format

Share Document