Ultrastructure of the annual cycle of female sperm storage in spermathecae of the torrent salamander,Rhyacotriton variegatus (Amphibia: Rhyacotritonidae)

2004 ◽  
Vol 261 (1) ◽  
pp. 1-17 ◽  
Author(s):  
David M. Sever ◽  
Cynthia K. Tait ◽  
Lowell V. Diller ◽  
Laura Burkholder
Keyword(s):  
Annual Cycle ◽  
Sperm Storage ◽  
Rhyacotriton Variegatus

Morphology and evolutionary implications of the annual cycle of secretion and sperm storage in spermathecae of the salamanderAmbystoma opacum (Amphibia: Ambystomatidae)

1995 ◽  
Vol 223 (1) ◽  
pp. 35-46 ◽  
Author(s):  
David M. Sever ◽  
John D. Krenz ◽  
Kristin M. Johnson ◽  
Lisa C. Rania
Keyword(s):  
Annual Cycle ◽  
Sperm Storage

Annual cycle of sperm storage in spermathecae of the red-spotted newt,Notophthalmus viridescens (Amphibia: Salamandridae)

1996 ◽  
Vol 227 (2) ◽  
pp. 155-170 ◽  
Author(s):  
David M. Sever ◽  
Lisa C. Rania ◽  
John D. Krenz
Keyword(s):  
Annual Cycle ◽  
Sperm Storage ◽  
Notophthalmus Viridescens

scholarly journals Androgen-related sperm storage in oviduct of Chinese Soft-Shelled Turtle in vivo during annual cycle

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
Tengfei Liu ◽  
Xiaoya Chu ◽  
Yufei Huang ◽  
Ping Yang ◽  
Quanfu Li ◽  
...  
Keyword(s):  
Annual Cycle ◽  
Sperm Storage

Annual cycle of courtship behavior in the male turkey.

1968 ◽  
Vol 66 (3, Pt.1) ◽  
pp. 743-746 ◽  
Author(s):  
Wolfgang M. Schleidt
Keyword(s):  
Annual Cycle ◽  
Courtship Behavior

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.

Annual Cycle of Sportfishing Activity at a Warmwater Discharge into Galveston Bay, Texas

1973 ◽  
Vol 102 (3) ◽  
pp. 573-577 ◽  
Author(s):  
Andre M. Landry ◽  
Kirk Strawn
Keyword(s):  
Annual Cycle ◽  
Galveston Bay

Trends in the amplitude of Baltic Sea level annual cycle

2008 ◽  
Author(s):  
Birgit Hünicke ◽  
Eduardo Zorita
Keyword(s):  
Baltic Sea ◽  
Sea Level ◽  
Annual Cycle

The Force-Frequency Dependence in the Heart Papillary Muscle of Ground Squirrel as a Reflection of Changes in the Functional State of Animals during the Annual Cycle

BIOPHYSICS ◽  
2019 ◽  
Vol 64 (5) ◽  
pp. 786-792
Author(s):  
O. V. Nakipova ◽  
A. S. Averin ◽  
L. S. Kosarsky ◽  
D. A. Ignatiev
Keyword(s):  
Frequency Dependence ◽  
Functional State ◽  
Papillary Muscle ◽  
Annual Cycle ◽  
Ground Squirrel ◽  
Force Frequency
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