Oviducal gland microstructure ofRaja miraletusandDipturus oxyrinchus(Elasmobranchii, Rajidae)

2015 ◽  
Vol 276 (11) ◽  
pp. 1392-1403 ◽  
Author(s):  
Martina F. Marongiu ◽  
Cristina Porcu ◽  
Andrea Bellodi ◽  
Danila Cuccu ◽  
Antonello Mulas ◽  
...  
Keyword(s):  
Oviducal Gland

How is the morphology of the oviducal gland and of the resulting egg capsule associated with the egg laying habitats of Rajidae species?

2015 ◽  
Vol 98 (10) ◽  
pp. 2037-2048 ◽  
Author(s):  
Catarina Maia ◽  
Bárbara Serra-Pereira ◽  
Karim Erzini ◽  
Ivone Figueiredo
Keyword(s):  
Egg Laying ◽  
Oviducal Gland ◽  
Egg Capsule

scholarly journals A Note on the Formation of the Egg Case of the Skate

1930 ◽  
Vol 16 (2) ◽  
pp. 577-581 ◽  
Author(s):  
A. D. Hobson
Keyword(s):  
Oviducal Gland ◽  
The Subject ◽  
Egg Case

There seems to be some uncertainty about the exact stage at which the horny case is secreted around the fertilised Elasmobranch egg. Those textbooks which have been consulted either pass over the matter in silence or give the impression that the shell is secreted while the egg is passing through the nidamental organ. Sedgwick (1905), for example, says (p. 143): “The shell is formed round the ovum and its albumen in the lower dilated part of the oviduct, but the material of which it is composed is secreted by the oviducal gland.” Of late years the question seems to have received little attention, but there are several papers on the subject published twenty or more years ago.

Sperm storage in males and females of the deepwater shark Portuguese dogfish with notes on oviducal gland microscopic organization

2011 ◽  
Vol 283 (3) ◽  
pp. 210-219 ◽  
Author(s):  
T. Moura ◽  
B. Serra-Pereira ◽  
L. S. Gordo ◽  
I. Figueiredo
Keyword(s):  
Sperm Storage ◽  
Oviducal Gland ◽  
Males And Females

scholarly journals Histological remarks of the oviduct and the oviducal gland of Sympterygia acuta Garman, 1877

2008 ◽  
Vol 68 (2) ◽  
pp. 359-365 ◽  
Author(s):  
EJ. Galíndez ◽  
S. Estecondo
Keyword(s):  
Genital Tract ◽  
Southwestern Atlantic ◽  
Ciliated Cells ◽  
Oviducal Gland ◽  
First Report ◽  
Reproductive Characteristics ◽  
Important Resource ◽  
Tubular Gland ◽  
Glandular Cells

The elasmobranchs constitute an important resource in Argentinian fishing and they show reproductive characteristics that make them susceptible to the pressure of fishing. In spite of the importance of the resource our knowledge about the species of the Southwestern Atlantic is scarce. In this work we study the microanatomy of the oviduct and the oviducal gland of Sympterygia acuta. The results show a very folded oviduct with mucous and ciliated cells. The oviducal gland depicts the same zonation as other batoids, showing the typical four regions (club, papillary, baffle and terminal). The epithelium lining the glandular lumen is simple columnar with ciliated and glandular cells. The four zones show simple or ramified tubular gland the secretions of which constitute the egg's envelopes. The club and baffle zones are similar to those present in other species. The papillary one depicts a different pattern of secretions that other Rajiformes and the last zone of the gland is characterized by mixed adenomers. The information here exposed constitutes the first report on the microanatomy of the genital tract of S. acuta.

Uterine epithelial-sperm interaction, endometrial cycle and sperm storage in the terminal zone of the oviducal gland in the placental smoothhound,Mustelus canis

2001 ◽  
Vol 292 (2) ◽  
pp. 129-144 ◽  
Author(s):  
William C. Hamlett ◽  
John A. Musick ◽  
Christopher K. Hysell ◽  
David M. Sever
Keyword(s):  
Sperm Storage ◽  
Oviducal Gland ◽  
Terminal Zone ◽  
Mustelus Canis

Does Nidamental Gland Jelly Induce the Formation of Perivitelline Space at Fertilization in the Squid Todarodes Pacificus?

1995 ◽  
Vol 75 (2) ◽  
pp. 495-497 ◽  
Author(s):  
Yuzuru Ikeda ◽  
Kenji Shimazaki
Keyword(s):  
Embryonic Development ◽  
Artificial Insemination ◽  
Egg Mass ◽  
Perivitelline Space ◽  
Oviducal Gland ◽  
Todarodes Pacificus ◽  
Accessory Reproductive Glands ◽  
Nidamental Gland

Squids have more than two accessory reproductive glands, namely oviducal and nidamental glands which release gelatinous substances at the time of spawning to produce an egg mass and in some sepiolids and loliginids there also exist accessory nidamental glands (Hamabe, 1962; Boletzky, 1986; Mangold, 1987). An exception are some enoploteuthid squids which lack the nidamental glands but have large oviducal glands (Naef, 1923). Ikeda et al. (1993) showed experimentally that the gelatinous substance from the oviducal gland has the role of generating the elevation of the chorion at fertilization, which causes the formation of the perivitelline space in squid such as Todarodes pacificus; the perivitelline space became larger during embryonic development in the presence of the oviducal gland jelly. Since T. pacificus lacks accessory nidamental glands (Sasaki, 1921), we address the question as to whether the gelatinous substances of nidamental gland origin also induce the formation of perivitelline space, as does the oviducal gland jelly in T. pacificus, based on the observations of artificial insemination.

scholarly journals Reproductive aspects of the velvet belly lantern shark Etmopterus spinax (Condrichthyes: Etmopteridae), from the central western Mediterranean sea. Notes on gametogenesis and oviducal gland microstructure.

2013 ◽  
Vol 15 (2) ◽  
pp. 313 ◽  
Author(s):  
C. PORCU ◽  
M. F. MARONGIU ◽  
M. C. FOLLESA ◽  
A. BELLODI ◽  
A. MULAS ◽  
...  
Keyword(s):  
Vertical Gradient ◽  
Western Mediterranean ◽  
Sperm Storage ◽  
Sexually Dimorphic ◽  
Oviducal Gland ◽  
Pregnant Females ◽  
Western Mediterranean Sea ◽  
Sperm Storage Tubules ◽  
First Time

In this paper, the reproductive biology of the velvet belly lanternshark Etmopterus spinax was analyzed in Sardinian waters (central western Mediterranean). This species was sexually dimorphic with females growing to a larger size than males. Marked sexual dimorphism in size was also observed along the vertical gradient. Histological analysis of gonads was very useful in assigning macroscopical maturity stages. The investigation on the microstructure of oviducal gland (OG) highlighted four morphofunctional zones with mucous and/or proteic secretions according to the zone and to their specific functions and development. Sperm in the OG was found for the first time in E. spinax. The localization of sperm storage tubules deeper in OG suggested long-term sperm storage, which is in agreement with the long reproductive cycle described. This species matured late, specifically at 80.7% and 79% at the maximum observed size for females and males respectively. Mature specimens were found throughout the year with pregnant females observed in winter and autumn. A low fecundity was observed with a mean ovarian fecundity of 16.5 mature follicles.

scholarly journals Morphological analysis of the oviduct, oviducal gland and isthmus of the blue shark Prionace glauca (Linnaeus, 1758) (Elasmobranchii: Carcharhiniformes)

2015 ◽  
Vol 13 (4) ◽  
pp. 663-672 ◽  
Author(s):  
Bianca S. Rangel ◽  
Carlos E. Malavasi Bruno ◽  
Thierry Salmon ◽  
Adriano P. Ciena ◽  
Maria A. Miglino ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Morphological Analysis ◽  
Three Dimensional ◽  
Blue Shark ◽  
Prionace Glauca ◽  
Oviducal Gland ◽  
Terminal Zone ◽  
Glandular Cells ◽  
Microscopy Techniques ◽  
Scanning Electron

ABSTRACT Oviducal gland present in elasmobranchs is correlated to the organism's reproductive strategy, and its functions are to produce mucus, to form the egg's tertiary envelope and to store sperm. The gland contains four zones: club, papillary,baffle and terminal. The structures of the oviduct, oviducal gland and isthmus of blue shark Prionace glauca were described using macroscopic, light microscopy and scanning electron microscopy techniques. The epithelium of the oviduct and isthmus is folded and is a simple, columnar, ciliated lining epithelium with glandular cells. In the oviducal gland, the lining tissues in the four zones are similar to the oviduct and isthmus lining. The terminal zone shows the presence of sperm in the lumen of the secretory tubules, which remains stored even in the absence of recent copulation. Here, these organs were studied and their connections in an attempt to elucidate the mechanisms of reproduction in the blue shark, showing the three-dimensional aspects, thus adding morphological information important for the understanding of the structure and functioning of these organs of fundamental importance in the life of the majority of elasmobranchs.

Observations by scanning electron microscope (S.E.M.) on the oviducal gland sacs of Balanus balanoides at egg-laying

1977 ◽  
Vol 57 (4) ◽  
pp. 969-972 ◽  
Author(s):  
G. Walker
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Mantle Cavity ◽  
Egg Laying ◽  
Oviducal Gland ◽  
The Subject ◽  
Balanus Balanoides ◽  
Scanning Electron

Balanus balanoides (L.) is a cross-fertilizing hermaphrodite. The spermatozoa which are inseminated into the mantle cavity are initially inactive. Eggs are laid into the two elastic sacs of the oviducal glands (see Walley, 1965), which expand into the mantle cavity as more eggs are laid. The discharge of eggs into the elastic sacs also forces fluid out of the oviducal glands into the mantle cavity where the spermatozoa have been deposited. The fluid activates the inseminated spermatozoa (Walley, White & Brander, 1971; Walker, 1977).In order to effect fertilization of the eggs activated spermatozoa must pass across the oviducal gland sac wall. How the spermatozoa accomplish this is the subject of the present investigation.

Sign in / Sign up

Export Citation Format

Share Document