The effect of under-feeding on the genital functions of a bull

1953 ◽  
Vol 43 (3) ◽  
pp. 343-347 ◽  
Author(s):  
T. Mann ◽  
A. Walton
Keyword(s):  
Citric Acid ◽  
Food Intake ◽  
Recovery Period ◽  
Experimental Period ◽  
Secretory Function ◽  
Male Accessory Glands ◽  
Accessory Glands ◽  
Normal Feeding

1. A study was made of the effect of underfeeding on the genital functions in the bull. Regular weekly collections of semen were made during (1) a 5-week pre-experimental period of normal feeding, (2) a 23-week experimental period of under-feeding, and (3) a 25-week post-experimental period of recovery.2. Although the food intake was reduced to such an extent that the bull began to lose weight at a rate of 6·5 kg. (1 stone) per week, the volume and density of semen and the motility and morphology of the spermatozoa were not significantly changed.3. In contrast to the testes, the secretory function of the male accessory glands was markedly affected by under-feeding. The concentration of fructose and citric acid in semen decreased to about 30 and 60% respectively of the original levels. During the recovery period the values for fructose and citric acid gradually returned to normal.

FRUCTOSE AND CITRIC ACID IN THE MALE ACCESSORY GLANDS OF THE INDIAN PALM SQUIRREL, FUNAMBULUS PENNANTI (WROUGHTON)

1966 ◽  
Vol 35 (2) ◽  
pp. 193-197 ◽  
Author(s):  
A. H. REDDI ◽  
M. R. N. PRASAD ◽  
S. DURAISWAMI
Keyword(s):  
Citric Acid ◽  
Seminal Vesicle ◽  
Male Accessory Glands ◽  
Accessory Glands

SUMMARY The sites of formation of fructose and citric acid in the male accessory glands of reproduction in the Indian palm squirrel, Funambulus pennanti, are described. The seminal vesicle secretes only fructose in concentrations much higher than any recorded so far in a rodent. The compact prostate produces both fructose and citric acid. The findings are discussed in relation to the sites of formation of these constituents in other rodents.

Effect of nutrition on the onset of male sex hormone activity and sperm formation in monozygous bull-calves

1957 ◽  
Vol 147 (928) ◽  
pp. 332-351 ◽  
Keyword(s):  
Citric Acid ◽  
Food Intake ◽  
Seminal Vesicles ◽  
Sex Hormone ◽  
Seminiferous Tubules ◽  
Interstitial Tissue ◽  
Secretory Function ◽  
Histological Changes ◽  
Bull Calves ◽  
Male Sex

The effect of a reduced food intake on the onset of androgenic activity and the appearance of spermatozoa was studied in maturing bull-calves. Three pairs of identical twin-calves were used. In each instance, one twin was reared on a ‘high plane’ of nutrition, consisting of normal feeding, and the other on a ‘low plane’ of reduced food intake. Semen was collected from the twin-calves by the electric stimulation method, and analyzed for sperm density, fructose and citric acid. The appearance of fructose and citric acid in semen was taken as an indicator of the onset of secretory function in the seminal vesicles, which depends on the presence of the male sex hormone. Fructose and citric acid appeared in electrically-discharged semen from the normally fed bull-calves several months before the first spermatozoa. This suggested that the male sex hormone began to act in the young animal several months before the appearance of the first spermatozoa. Restriction of food intake had a marked delaying influence on the onset of fructose and citric acid secretion, and a smaller delaying effect on the appearance of spermatozoa. The delaying effect of underfeeding on the secretory function of the bull seminal vesicles as reflected in the diminished output of fructose and citric acid, appeared to be the result of an inadequate stimulation of the gonads by the gonadotrophic hormone. Injections of gonadotrophin were found to elicit a prompt appearance of both fructose and citric acid in the semen. Alterations in the composition of semen caused by underfeeding were shown to run parallel to histological changes in the testes and male accessory organs. Low-plane feeding retarded the differentiation of the seminiferous tubules and of the interstitial tissue in the male gonads. The histological changes in the seminal vesicles induced by underfeeding corresponded closely to the diminished secretory output of fructose and citric acid in these glands.

THE EFFECTS OF A JH MIMIC AND CAUTERIZATION OF THE CORPUS ALLATUM COMPLEX ON THE MALE ACCESSORY GLANDS OF AEDES AEGYPTI (DIPTERA: CULICIDAE)

1977 ◽  
Vol 109 (7) ◽  
pp. 897-906 ◽  
Author(s):  
S Ramalingam ◽  
G. B. Craig
Keyword(s):  
Aedes Aegypti ◽  
Juvenile Hormone ◽  
Corpus Allatum ◽  
Secretory Process ◽  
Secretory Function ◽  
Fully Depleted ◽  
Male Accessory Glands ◽  
Accessory Glands ◽  
Enhanced Secretion ◽  
Juvenile Hormone Mimic

AbstractJuvenile hormone, the secretion of the corpus allatum, apparently controls the secretory process of the male accessory glands of the yellow fever mosquito, Aedes aegypti. Topical application of a juvenile hormone mimic induces precocious and enhanced secretion. The treatment with the JH mimic not only increases the potency of males to inseminate more numbers of females, but also stimulates secretion in fully depleted glands of A. aegypti which under normal conditions do not renew the secretory process. Males whose accessory glands are depleted due to multiple matings and later treated with the mimic also inseminate. Cauterization of the corpus allatum complex has prevented the secretory function in the glands.

SITES OF FORMATION OF FRUCTOSE, CITRIC ACID AND SIALIC ACID IN THE ACCESSORY GLANDS OF THE GIANT FRUIT BAT, PTEROPUS GIGANTEUS GIGANTEUS (BRÜNNICH)

1970 ◽  
Vol 46 (4) ◽  
pp. 413-NP ◽  
Author(s):  
M. RAJALAKSHMI ◽  
M. R. N. PRASAD
Keyword(s):  
Sialic Acid ◽  
Citric Acid ◽  
Seminal Vesicle ◽  
Genital Tract ◽  
Male Genital Tract ◽  
Male Accessory Glands ◽  
Accessory Glands ◽  
Fruit Bat ◽  
Male Genital

SUMMARY The morphology of the male genital tract and the sites of formation of fructose, citric acid and sialic acid in the male accessory glands of the giant fruit bat, Pteropus giganteus giganteus are described. The seminal vesicle secretes only fructose while the prostate and ampullary glands secrete both fructose and citric acid. Cowper's glands secrete large amounts of sialic acid. However, considerable variations in content and concentration of these constituents are found within the group.

Ability of Some Progestational Steroids to Stimulate Male Accessory Glands of Reproduction in the Rat

1959 ◽  
Vol 100 (3) ◽  
pp. 540-543 ◽  
Author(s):  
S. C. Lyster ◽  
G. H. Lund ◽  
W. E. Dulin ◽  
R. O. Stafford
Keyword(s):  
Male Accessory Glands ◽  
Accessory Glands

The Drosophila melanogaster X-Linked mfs(1)6E Locus Is Required for Production of Normal Seminal Fluid by the Male Accessory Glands

2001 ◽  
Vol 267 (1) ◽  
pp. 1-12 ◽  
Author(s):  
Pedro P. López ◽  
Juán F. Santarén ◽  
M.Fernanda Ruiz ◽  
Pedro Esponda ◽  
Lucas Sánchez
Keyword(s):  
Drosophila Melanogaster ◽  
Seminal Fluid ◽  
Male Accessory Glands ◽  
Accessory Glands
Sign in / Sign up

Export Citation Format

Share Document