Epididymal sperm storage in Rickett's big-footed bat (Myotis ricketti)

2008 ◽  
Vol 10 (1) ◽  
pp. 161-167
Author(s):  
Zhe Wang ◽  
Qi-Xian Shi ◽  
Yi-Nan Wang ◽  
Yan-Ling Wang ◽  
Shu-Yi Zhang
Keyword(s):  
Sperm Storage ◽  
Epididymal Sperm

Observations on the Reproductive-Biology and Anatomy of Rhinolophus-Megaphyllus (Chiroptera, Rhinolophidae) in Eastern Australia

1992 ◽  
Vol 40 (5) ◽  
pp. 533 ◽  
Author(s):  
PH Krutzsch ◽  
RA Young ◽  
EG Crichton
Keyword(s):  
Corpus Luteum ◽  
Late Summer ◽  
Sperm Storage ◽  
Epididymal Sperm ◽  
Male And Female ◽  
Vaginal Plug ◽  
Eastern Australia ◽  
Accessory Sex Organs ◽  
Reproductive Events

The anatomy and chronology of reproductive events in male and female Rhinolophus megaphyllus from eastern Australia (27-32-degrees-S.) is discussed. Rhinolophus megaphyllus was monoestrous and monotocous. A delay of several months occurs between the delivery of spermatozoa to the caudae epididymides (late summer/early autumn) and copulation/ovulation/conception (winter), which occur towards the termination of the spermatogenic cycle. There is no storage of sperm in female tracts prior to ovulation but epididymal sperm storage persists beyond the time of birth (late spring). Male, but not female, readiness to initiate reproduction prior to the onset of winter, places this species in an 'intermediate' position with features of both temperate and tropical chiropteran reproductive cycle patterns. The presence of an extroverted corpus luteum in the female and of a complement of accessory sex organs in the male are normal glandular features for members of this chiropteran family. The role of the urethral gland is unknown; however, since there is no vaginal plug, its products apparently do not coagulate in the vagina in this species following insemination.

scholarly journals Changes in membrane carbohydrates distribution associated to epididymal sperm maturation during the prolonged sperm storage period of Corynorhinus mexicanus bat (Chiroptera: Vespertilionidae)

2020 ◽  
Vol 36 (1) ◽  
pp. 1-12 ◽  
Author(s):  
Ahiezer Rodríguez Tobón ◽  
Reyna Fierro ◽  
Miguel Angel León Galván ◽  
Adolfo Rosado ◽  
Edith Cortés Barberena ◽  
...  
Keyword(s):  
Storage Period ◽  
Sperm Storage ◽  
Sperm Maturation ◽  
Epididymal Sperm

The Effects of the sphragis on male and female genitalia in Acraea (Nymphalidae) butterflies

2020 ◽  
Vol 22 ◽  
Author(s):  
Shannon L Summers ◽  
Akito Y Kawahara ◽  
Ana P. S. Carvalho
Keyword(s):  
Interspecific Variation ◽  
Sperm Storage ◽  
Male Mating ◽  
Museum Collections ◽  
Storage Organ ◽  
Mating Plug ◽  
Males And Females ◽  
Comparison And Analysis ◽  
Imagej Software ◽  
Sexually Antagonistic Coevolution

Male mating plugs have been used in many species to prevent female re-mating and sperm competition. One of the most extreme examples of a mating plug is the sphragis, which is a large, complex and externalized plug found only in butterflies. This structure is found in many species in the genus Acraea (Nymphalidae) and provides an opportunity for investigation of the effects of the sphragis on the morphology of the genitalia, which is poorly understood. This study aims to understand morphological interspecific variation in the genitalia of Acraea butterflies. Using specimens from museum collections, abdomen dissections were conducted on 19 species of Acraea: 9 sphragis bearing and 10 non-sphragis bearing species. Genitalia imaging was performed for easier comparison and analysis and measurements of genitalia structures was done using ImageJ software. Some distinguishing morphological features in the females were found. The most obvious difference is the larger and more externalized copulatory opening in sphragis bearing species, with varying degrees of external projections. Females of the sphragis bearing species also tend to have a shorter ductus (the structure that connects the copulatory opening with the sperm storage organ) than those without the sphragis. These differences may be due to a sexually antagonistic coevolution between the males and females, where the females evolve larger and more difficult to plug copulatory openings and the males attempt to prevent re-mating with the sphragis.

Localization of calcium and zinc in the sperm storage tubules of chicken, quail and turkey using X-ray microanalysis

Reproduction ◽  
2000 ◽  
pp. 331-336 ◽  
Author(s):  
L Holm ◽  
H Ekwall ◽  
GJ Wishart ◽  
Y Ridderstrale
Keyword(s):  
Calcium Concentration ◽  
Sperm Storage ◽  
X Ray ◽  
Elemental Concentrations ◽  
Low Concentrations ◽  
Intracellular Content ◽  
Wet Weight ◽  
The Mean ◽  
Sperm Storage Tubules ◽  
Scanning Electron

Sperm storage tubules from the utero-vaginal junction of chickens, quails and turkeys were analysed for calcium and zinc using X-ray microanalysis of ultra-rapidly frozen tissue in a scanning electron microscope. This technique enabled the tubular fluid surrounding the stored spermatozoa and the intracellular content of the cells of the sperm storage tubules to be analysed separately and, by using standards with known concentrations, their elemental concentrations were estimated. The mean (+/- SEM) concentration of calcium in the tubular fluid from chickens, quails and turkeys was 17 +/- 3, 19 +/- 3 and 17 +/- 4 mmol kg(-1) wet weight, respectively. The intracellular calcium concentration of the cells of the tubules did not differ significantly from these values and was also similar in the mucosal epithelial cells of the utero-vaginal junction. Zinc was localized in the cells of turkey sperm storage tubules and tubular fluid, but at low concentrations. No zinc could be detected in corresponding structures from chickens and quails. The concentration of calcium in the tubular fluid is within the range known to inhibit the motility of spermatozoa, supporting this function for calcium during storage. Zinc is known to depress turkey sperm metabolism and it may also be involved in inducing quiescence of spermatozoa during storage in this species.

Deficiency for Lcn8 causes epididymal sperm maturation defects in mice

2021 ◽  
Vol 548 ◽  
pp. 7-13
Author(s):  
Zongzhuang Wen ◽  
Dongyue Liu ◽  
Haixia Zhu ◽  
Xiaoyang Sun ◽  
Yu Xiao ◽  
...  
Keyword(s):  
Sperm Maturation ◽  
Epididymal Sperm
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