+ Site Statistics
+ Search Articles
+ PDF Full Text Service
How our service works
Request PDF Full Text
+ Follow Us
Follow on Facebook
Follow on Twitter
Follow on LinkedIn
+ Subscribe to Site Feeds
Most Shared
PDF Full Text
+ Translate
+ Recently Requested

Comparative study of boar sperm coming from the caput, corpus, and cauda regions of the epididymis



Comparative study of boar sperm coming from the caput, corpus, and cauda regions of the epididymis



Journal of Andrology 16(2): 175-188



Sperm quality in the Caput, corpus, and cauda regions of the epididymis of healthy and sexually mature Landrace boars was studied. Epididymal sperm characteristics were examined by light microscopy (LM), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). Sperm vitality decreased very slightly although progressively with the transport of sperm through the epididymis. Osmotic resistance of acrosomes was very low in the sperm from the Caput and apprx 100% in the corpus and cauda. The incidence of spermatozoa with the head detached from the tail remained stable in the first two regions of the epididymis, increasing notably in the cauda. Sperm agglutination increased progressively as sperm progressed along the epididymal duct. The percent of mature spermatozoa and aberrant spermatozoa increased from the Caput to the cauda, whereas the percent of immature spermatozoa decreased. In the Caput and corpus the percent of immature spermatozoa was similar, although in the Caput they were characterized by the presence of a proximal cytoplasmic droplet; in the corpus the cytoplasmic droplet was distal. The acrosomal protuberance was highly developed in spermatozoa from the epididymal caput, but its volume was considerably reduced in those from the epididymal cauda. The electron density of the acrosomal content was lower in spermatozoa from the caput than in those from the epididymal cauda. The mitochondrial sheath of spermatozoa from the caput was made of voluminous mitochondria of unequal size, with a low electron-dense matrix. In the cauda region, the mitochondria were smaller in diameter, homogeneous in size, and with greater matrix electron density. This last fact is related to the loss of the capacity of spermatozoa to fold their tail by the midpiece as they progress along the epididymal duct. The complex epididymal maturation process of the sperm results in quantitative and qualitative changes that can be characterized in each of the three epididymal regions. The presence in the ejaculate of one or more gamete forms belonging to the epididymal caput, corpus, or cauda will allow workers to better establish the intensity of stress produced by a high frequency of semen collection.

Please choose payment method:






(PDF emailed within 0-6 h: $19.90)

Accession: 008352294

Download citation: RISBibTeXText

PMID: 7559149

DOI: 10.1002/j.1939-4640.1995.tb01751.x


Related references

Analysis of characteristics and cryosurvival of sperm from the caput, corpus and cauda epididymis of the domestic dog. Biology of Reproduction 64(Suppl. 1): 222-223, 2001

Evaluation of boar sperm maturation after co-incubation with caput, corpus and cauda epididymal cultures [corrected. Theriogenology 64(9): 1995-2009, 2005

Expression profiles of human epididymis epithelial cells reveal the functional diversity of caput, corpus and cauda regions. Molecular Human Reproduction 22(2): 69-82, 2016

Different expression of B7-H3 in the caput, corpus, and cauda of the epididymis in mouse. Bmc Urology 17(1): 23, 2017

In vitro culture of epithelial cells from the caput, corpus, and cauda epididymis of Sus domesticus. Theriogenology 62(5): 929-942, 2004

Effects of seasons on biochemical and electrolyte components of Caput, corpus and cauda epididymis of buffaloes. Indian Veterinary Journal 75(7): 617-620, 1998

Pentose phosphate cycle in tissue from the caput, corpus and cauda epididymidis of the boar. Japanese Journal of Fertility and Sterility 33(3): 635-638, 1988

Pentose phosphate cycle in the caput corpus and cauda epididymal tissue from the boar. Japanese Journal of Fertility and Sterility 33(3): 163-166, 1988

Changes in the fluidity of the goat sperm plasma membrane in transit from caput to cauda epididymis. Biochemistry International 21(5): 797-803, 1990

Bovine epididymal sperm morphology obtained from caput, corpus and cauda epididymides. Pakistan Journal of Biological Sciences 10(21): 3936-3939, 2007

DELTA5-3beta-hydroxysteroid dehydrogenase activity in the caput, corpus cauda epididymis of Taphozous melanopogon melanopogon Temminck Microchiroptera Mammalia. Current Science (Bangalore) 50.11: 487-489, 1981

Pathogenetic transition in the morphology of abnormal sperm in the testes and the caput, corpus, and cauda epididymides of male rats after treatment with 4,6-dinitro-o-cresol. Reproductive Toxicology 22(3): 501-507, 2006

In vitro fertilizability of sperm from various regions of the boar epididymis. Biology of Reproduction 34(Suppl. 1): 99, 1986

Protein synthesis by isolated spermatozoa from cauda and caput epididymis of rat. Acta Physiologica Latino Americana 23(5): 358-362, 1973

Free amino acids in the caput and the cauda epididymis of adult rats. Endocrinologia Japonica 23(2): 149-156, 1976