scholarly journals GONADAL AND EXTRAGONADAL SPERM RESERVES AND TESTICULAR HISTOMETRY OF POST PUBERTAL MUTURU BULLS.

2021 ◽  
Vol 25 (2) ◽  
pp. 106-110
Author(s):  
A. G. Ezekwe
Keyword(s):  
Seminiferous Tubule ◽  
Sperm Production ◽  
Definite Trend ◽  
Histological Characteristics ◽  
Tubule Diameter ◽  
Daily Sperm Production

Testes and epididymides were obtained from three pubertial Muturu bulls aged 11 months and 12 post pubertal bulls aged between 13 and 17 months and weighed between 91 and 148kg. Samples of each testis and epididymal segments namely, caput, corpus and cauda, were processed for histology while samples for gonadal and extragonadal sperm reserves were processed using the homogenisation technique. Paired testes weight increased from 78.99+8.74g at 11months of age to 90.10+10.86g. 110.30+5.67g and 106.34-6.52g at 13, 15 and 17 months of age, respectively. Paired testes sperm numbers were 3.00+1.50 X 10', 5.25 0.51 x 10', 10.44+2.55 x 10° and 9.14+3.08 x 10°, during the corresponding periods. Similarly, daily sperm production (DSP) increased by 77%, 250% and 207% at 13, 15 and 17 months of age, respectively. There was a 22% increase in the seminiferous tubule diameter from the time of puberty at 11 months to the time bulls were 15 months old, but the histological characteristics of the different epididymal segments did not follow any definite trend during these periods. Correlations between paired testes weight and other testicular and epididymal parameters were positive and significant (P<0.01). These results suggest that Muturu bulls may be used for breeding from the age of 15 months.

scholarly journals Comb, cloaca and feet scores and testis morphometry in male broiler breeders at two different ages

2017 ◽  
Vol 69 (6) ◽  
pp. 1529-1538
Author(s):  
R.A.C. Leão ◽  
F.L.S. Castro ◽  
P.R. Xavier ◽  
D.P. Vaz ◽  
J.G.V. Grázia ◽  
...  
Keyword(s):  
Body Weight ◽  
Seminiferous Tubule ◽  
Phenotypic Traits ◽  
Interstitial Tissue ◽  
Sperm Production ◽  
Phenotypic Characteristics ◽  
Broiler Breeder ◽  
Tubule Diameter ◽  
Daily Sperm Production

ABSTRACT In broiler breeder roosters, the weight of the testes is positively associated with daily sperm production and fertility. In birds, the testes are located in the coelomic cavity, not being accessible to reproductive evaluation as mammalian testes. The reproductive evaluation of roosters is based on phenotypic traits. Any changes on testes will be reflected on fertility levels. The aim of this paper was to evaluate the potential of association of phenotypic traits as body weight (BW), comb scores (COS), cloaca scores (CLS) and feet scores (FS) with testicular morphometric parameters in adult Cobb® Mx roosters in two ages (25 and 45 weeks of age). The low BW roosters had lower testes weight (TW), smaller seminiferous tubule diameter (STD) and lower comb and cloaca scores than the medium and high BW roosters (P≤0.05). Heavy roosters had the highest COS and bigger seminiferous epithelium height (SEH). There was no statistical difference between the BW categories in FS and volumetric proportion of seminiferous tubule (ST) and interstitial tissue (IT). Considering the age effect, roosters with 45 weeks of age had lower TW and ST than 25-week roosters. Positive, moderate and significant correlation was found between testes weight and phenotypic characteristics as BW, COS and CLS in 45week roosters. A positive, moderate and significant correlation was found between body weight and histologic testicular characteristics as STD and SHE in both evaluated ages. In conclusion, there is a regression in the testes weight with age and it is more intense in Cobb® Mx roosters with lower BW. Furthermore, it is concluded that the BW positively influences the testes weight and histological quality of the testes. COS and CLS can be used with moderate potential prediction to identify roosters with low testes weight at 45 weeks of age.

Prolonged deleterious effects of neonatal handling on reproductive parameters of pubertal male rats

2006 ◽  
Vol 18 (4) ◽  
pp. 497 ◽  
Author(s):  
Renata Mazaro ◽  
Teresa Lúcia Lamano-Carvalho
Keyword(s):  
Sertoli Cells ◽  
Seminiferous Tubule ◽  
Male Rats ◽  
Germinal Epithelium ◽  
Reproductive Parameters ◽  
Sperm Production ◽  
Neonatal Handling ◽  
Epithelium Thickness ◽  
Cauda Epididymidis ◽  
Daily Sperm Production

The purpose of the present study was to investigate the long-lasting effects of neonatal handling on reproductive parameters of male rats. Neonatal handling (pups separated from their mothers, kept isolated at environmental temperature for 20 min and submitted to 1 min of tactile stimulation) was applied from post partum Days 1 to 14 (a stress-hyporesponsive period, SHRP) and the animals were killed at puberty (61 days of age). The number of mature spermatids and the daily sperm production were estimated in homogenates from the right testes and cauda epididymidis. Histometric parameters (diameter of seminiferous tubule, germinal epithelium thickness and number of Sertoli cells) were evaluated in paraplast sections of the left testes. The association of the slightly aversive stimuli applied during the SHRP proved to have lasting deleterious effects on male reproduction, causing lower testicular weight and reduced values of seminiferous tubule diameter and germinal epithelium thickness at puberty, which resulted in a 25% reduction in the daily sperm production and in the number of mature spermatids. Similarly, the number of Sertoli cells per tubular cross section was 20% smaller and the weight and number of spermatozoa were reduced more than 40% in the cauda epididymidis of animals handled.

scholarly journals PSX-5 Reproductive organ weights, morphology and sperm reserves in intact and short scrotum post-pubertal male dairy sheep lambs

2019 ◽  
Vol 97 (Supplement_3) ◽  
pp. 467-467
Author(s):  
Stephan Wildeus ◽  
Susan Schoenian ◽  
D Philip Sponenberg ◽  
Mary Beth Bennett ◽  
Dahlia O’Brien
Keyword(s):  
Reproductive Tract ◽  
Reproductive Organ ◽  
Sperm Production ◽  
Dairy Sheep ◽  
Left Testis ◽  
Significant Difference ◽  
Ram Lambs ◽  
The Right ◽  
Tubule Diameter ◽  
Daily Sperm Production

Abstract This study evaluated the use of short-scrotum castration to create sterile ram lambs. East Friesian x Lacaune male lambs born in February on a commercial sheep dairy were left intact (n = 19; IN) or rendered short-scrotum (n = 17; SS) within 10 d of birth. At 3 mo of age lambs were transferred to the study site and grazed as one group, while being supplemented with a grain mixture at 0.7 kg/d. Lambs were harvested at 6 mo of age, and reproductive tract of 5 IN and 5 SS lambs collected at random and shipped cold overnight for processing. Testis and epididymis were weighed. Segments of the left testis and epididymis were processed for histology, while a subsample of testicular parenchyma and epididymal segments of the right side were used to determine sperm reserves by tissue homogenization. Differences between testis types were determined using GLM of SAS. Testes and epididymal weights were reduced (P &lt; 0.001) in SS (115 and 22 g) compared to IN (364 and 50 g) lambs. Seminiferous tubule diameter was also smaller (P &lt; 0.001) in SS (142 µm) than IN (234 µm) lambs. Daily sperm production per gram testicular parenchyma (DSPG) was not different between types (3.8 vs. 2.3 million sperm/g; P = 0.06), but total daily sperm production was lower (P &lt; 0.01) in SS (0.23 billion) than IN (1.34 billion) ram lambs. Considerable variation was noted in DSPG in IN lambs suggesting still incomplete development at this age, and accounting for the lack of a significant difference. Epididymal sperm reserves were markedly reduced (P &lt; 0.001) in SS (0.1 billion) compared to IN (10.5 billion), and decreased along the epididymis, supported by evidence of phagocytic action by the epididymal epithelium. Data suggest that ram lambs rendered short-scrotum shortly after birth develop smaller testes with reduced sperm production, making them effectively infertile.

scholarly journals Number and function of Sertoli cells, number and yield of spermatogonia, and daily sperm production in three breeds of boar

Reproduction ◽  
1996 ◽  
Vol 107 (1) ◽  
pp. 137-149 ◽  
Author(s):  
O. E. Okwun ◽  
G. Igboeli ◽  
J. J. Ford ◽  
D. D. Lunstra ◽  
L. Johnson
Keyword(s):  
Sertoli Cells ◽  
Sperm Production ◽  
And Function ◽  
Daily Sperm Production

scholarly journals Knockout of Murine Mamld1 Impairs Testicular Growth and Daily Sperm Production but Permits Normal Postnatal Androgen Production and Fertility

2017 ◽  
Vol 18 (6) ◽  
pp. 1300 ◽  
Author(s):  
Mami Miyado ◽  
Kaoru Yoshida ◽  
Kenji Miyado ◽  
Momori Katsumi ◽  
Kazuki Saito ◽  
...  
Keyword(s):  
Sperm Production ◽  
Testicular Growth ◽  
Daily Sperm Production

scholarly journals Determination of Daily Sperm Production (DSP) in Rabbit (Oryctolagus cuniculus) Bucks using Testicular Parameters

2015 ◽  
Vol 5 (4) ◽  
pp. 141-148
Author(s):  
Olumuyiwa Joseph Olarotimi ◽  
◽  
Olujide Adedamola Sokunbi ◽  
Abdur-Rahman Abdullah ◽  
◽  
...  
Keyword(s):  
Oryctolagus Cuniculus ◽  
Sperm Production ◽  
Daily Sperm Production

Effect of mouse epidermal growth factor on fertility in rams

1990 ◽  
Vol 41 (6) ◽  
pp. 1147 ◽  
Author(s):  
BW Brown ◽  
PE Mattner ◽  
BA Panaretto ◽  
GH Brown ◽  
BD Gream ◽  
...  
Keyword(s):  
Body Weight ◽  
Survival Rate ◽  
Growth Factor ◽  
Epidermal Growth Factor ◽  
Post Treatment ◽  
Sperm Production ◽  
Teratogenic Effects ◽  
Progressive Motility ◽  
Epidermal Growth ◽  
Daily Sperm Production

Seminal characteristics and flock fertility were studied in Merino rams treated with mouse epidermal growth factor (EGF). Intravenous infusions of 105 8g EGF/kg body weight over 24 h in five rams had no statistically significant effect on daily sperm production measured from 6-10 weeks after dosing or on the percentages of spermatozoa that were unstained (nigrosinleosin stain) or morphologically normal. At 7-8 weeks post treatment, the percentage of spermatozoa exhibiting progressive motility was significantly reduced (P<0.05). By 9-10 weeks after treatment, the seminal characteristics were normal in all rams. In 1987, eight rams and in 1988, six ofthe same rams, were joined with ewes for 6 weeks (at a rate of 2%) 12 weeks after s.c. injection of 150 8g/kg body weight. Compared with the performance of control rams, EGF had no significant effect on ram fertility, nor did it produce any teratogenic effects in their progeny or effect their survival rate.

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