Ontogeny, Anatomy, and Reproductive Biology of Vegetative Reproductive Organs of Diodia virginiana L. (Rubiaceae)

1992 ◽  
Vol 153 (3, Part 1) ◽  
pp. 320-328 ◽  
Author(s):  
James H. Baird ◽  
Roland R. Dute ◽  
Ray Dickens
Keyword(s):  
Reproductive Biology ◽  
Reproductive Organs ◽  
Diodia Virginiana

Pregnancy in a marsupial, the Tasmanian pademelon (Thylogale billardierii)

1999 ◽  
Vol 11 (3) ◽  
pp. 175 ◽  
Author(s):  
R. W. Rose ◽  
J. A. A. Horak ◽  
A. D. Shetewi ◽  
S. M. Jones
Keyword(s):  
Corpus Luteum ◽  
Reproductive Biology ◽  
Plasma Concentrations ◽  
Tammar Wallaby ◽  
Reproductive Organs ◽  
Model Species ◽  
Histological Changes ◽  
Plasma Progesterone ◽  
Embryonic Growth ◽  
Background Data

The Tasmanian pademelon, Thylogale billardierii, is a medium-sized wallaby that adapts well to captivity and, unlike the well-studied tammar wallaby, is capable of breeding all year round. It may, there-fore, be a useful model species for research into the reproductive biology of macropod marsupials. This paper presents necessary background data on histological changes in the reproductive organs and the rate of embryonic growth during gestation in T. billardierii. After Day 4 RPY (removal of young from the pouch) the gravid and non-gravid uteri differ significantly in some histological parameters. The corpus luteum becomes active by Day 6 RPY and is fully developed by Day 14 RPY; it begins to degenerate from Day 19 RPY. Plasma progesterone concentrations through gestation follow a pattern similar to that in the tammar wallaby. There is an early, smaller, peak at Day 5 RPY, with plasma concentrations of progesterone then falling until the larger pre-partum peak occurs several days before birth.

Reproductive Biology of the Black Dogfish,Centroscyllium Fabricii, Collected From Waters off Western Greenland

1995 ◽  
Vol 75 (2) ◽  
pp. 285-310 ◽  
Author(s):  
Kazunari Yano
Keyword(s):  
Sex Ratio ◽  
Reproductive Biology ◽  
Breeding Season ◽  
Litter Size ◽  
Reproductive Organs ◽  
Normal Female ◽  
Size At Maturity ◽  
Free Living ◽  
Near Term ◽  
Female Reproductive Organs

The reproductive biology of 1124 male (165–760 mm TL) and 1476 female (175–898 mm TL) black dogfish,Centroscyllium fabricii, was examined. The sharks were caught off western Greenland with bottom otter trawls. Size at maturity was about 550 mm TL in males and 650 mm TL in females. Ovarian ova did not continue to develop during gestation. The sex ratio of embryos was 1:1. Litter size ranged from 4 to 40, with a mean of 16–4. The total number of mature ova, fertilized ova, or embryos tended to increase with size of the females. Development of black dogfish embryos is dependent solely on yolk reserves. Near-term embryos (152–192 mm TL) had completely absorbed their external yolk sacs. The smallest free-living specimens collected in this study were 165 mm TL for males and 175 mm TL for females. The black dogfish does not seem to have a well-defined breeding season. This species displayed a well-defined pattern of depth segregation by size. The sex ratios in five shallow depth strata (500–599, 600–699, 700–799,800–899, and 900–999 m) were 1:1, but those of three deeper depth strata (1000–1099,1100–1199, and 1200–1299 m) contained a significantly greater number of females than males. Four abnormal hermaphrodites possessed gonads containing both testicular and ovarian tis-sues. Two specimens had normal female reproductive organs (e.g. ovaries, oviducts, nidamental glands, and uteri) as well as claspers.

scholarly journals Anatomy of the Male Reproductive Organs of Javan Pangolin (Manis javanica)

2019 ◽  
Author(s):  
Yusrizal Akmal ◽  
Chairun Nisa ◽  
Savitri Novelina
Keyword(s):  
Reproductive Biology ◽  
Captive Breeding ◽  
Ex Situ Conservation ◽  
Morphological Characteristics ◽  
Reproductive Organs ◽  
Ex Situ ◽  
Wild Animals ◽  
Market Demand ◽  
Illegal Hunting ◽  
Male Reproductive Organs

Pangolin is an animal that has special attention by CITES since 1985. This is due to increase of market demand, especially from China. It causes the illegal hunting is increasing, so that alleged wild population decreases dramatically. Overcoming of decreasing of the pangolin populations in the wild, could be anticipated by captive breeding. The information about the status of the reproductive biology of wild animals is very important for implementation of ex situ conservation activities. One of the aspects of the reproductive biology of wild animals is knowledge of the anatomy and physiology of the reproductive organs both males and females.Nowdays, data on morphological characteristics of male reproductive organs of pangolin (M. javanica) still limited. The data obtained of this study is new information in reproductive biology, especially on the morphological characteristics of the male reproductive organs of pangolin (M. javanica). In addition, the information can be the data base that is important in the effort to support ex situ conservation.

scholarly journals Simultaneousness of reproductive organs of sour cherry cultivars adaptable to Iranian climatic condition

2009 ◽  
Vol 15 (4) ◽  
Author(s):  
G. Davarynejad ◽  
M. Ansari ◽  
T. Szabó ◽  
J. Tornyai ◽  
M. Soltész ◽  
...  
Keyword(s):  
Reproductive Biology ◽  
Climatic Condition ◽  
Sour Cherry ◽  
Reproductive Organs ◽  
Climatic Changes ◽  
High Variability ◽  
Prunus Cerasus ◽  
Environmental Cues ◽  
Development Patterns

Observations were made on simultaneousness of pollen shedding and stigma viability ratio, to clarify the phenology of reproductive organs of nine economically important sour cherry (Prunus cerasus L.) cultivars (‘Érdi bôtermô‘, ‘Debreceni bőtermő‘, ‘Csengődi‘, ‘Kántorjánosi 3‘, ‘Újfehértói fürtös‘, ‘Petri‘, ‘Eva‘, ‘Oblascinszka‘, and ‘Pándy 279’). The main aim was investigation the possible influence of environmental cues in timing and development of phenophases and also responses of different cultivars to seasonal cues. Likely effects of climatic changes on phenological development patterns were also considered. Results showed important aspects of the reproductive biology of sour cherry flowers. The amplitude of the phenophase “beginning of blossoming” between cultivars did not exceed 6 days. There is a maximum 3 day difference in the blooming length of different directions in each cultivar. ‘Pándy 279‘ showed high variability when the position of flowers changed on the tree shoots. ‘Újfehértói fürtös‘ was stable in all four directions of the tree. The pollen shedding period and stigma viability ratio were synchronous. Pollen shedding phenomenon simultaneously occurred with the secretary activities of stigmas in all examined cultivars. Distribution of pollen shedding over the secretary activity of stigmas is almost good. In all five cultivars maximum pollen shedding occurred when the temperature was high during the day. In general the results of this experiment and our previous studies clearly demonstrate that the Pándy groups not recommended for plantation in new orchards of Iran.

Normal ultrasonographic images of reproductive organs of female Japanese quails (Coturnix coturnix japonica): a laboratory animal model

2016 ◽  
Vol 51 (1) ◽  
pp. 75-84 ◽  
Author(s):  
Farzaneh Hosseini ◽  
Mohammad Hasan Mehraei Hamzekolaei ◽  
Abdol Karim Zamani Moghaddam ◽  
Hajar Arabha ◽  
Seyyed Sattar Tohidifar
Keyword(s):  
Reproductive Biology ◽  
Laboratory Experiments ◽  
Reproductive Organs ◽  
Coturnix Japonica ◽  
Laboratory Model ◽  
Coturnix Coturnix Japonica ◽  
Ultrasound Scanning ◽  
Coturnix Coturnix ◽  
Japanese Quails ◽  
Ovulatory Follicles

Certain special biological characteristics of Japanese quails ( Coturnix coturnix japonica) could enable quicker and less expensive laboratory experiments than similar studies using mice or chickens. Moreover, due to some physiological similarities with humans, quails have been recognized as an ideal laboratory model for experiments in some fields such as immunology, endocrinology, and reproductive biology. The aim of this study was to acquire normal ultrasonographic images of reproductive organs of female Japanese quails in order to facilitate laboratory experiments on reproductive biology and to determine a non-invasive in-life alternative to carcass analysis. Thirty female Japanese quails of different ages were used for ultrasound scanning of ovaries, follicles, ova, oviducts and eggs. In addition, five quails were euthanized for experiments using a direct standoff imaging technique. It was possible to identify different sizes of follicles ranging from small white follicles (0.14 cm) to large yellow follicles (2.57 cm), post-ovulatory follicles (POFs), ova at various stages of development, oviducts, and also eggs within the oviducts. These findings demonstrate that ultrasound scanning of female Japanese quail reproductive organs might be a beneficial diagnostic tool for applications such as studying reproductive physiology, anticipating the beginning or the end of the breeding season, detecting any pathological disorders easily, and identifying non-productive females which could lead to more cost-efficient laboratory procedures.

Ultrastructural aspects of gymnosperms reproductive organs tissues due to their functional condition

1978 ◽  
Vol 36 (2) ◽  
pp. 440-441
Author(s):  
G. M. Kozubov
Keyword(s):  
Metabolic Activity ◽  
Functional Condition ◽  
Reproductive Organs ◽  
Considerable Change ◽  
Complicated Structure ◽  
Tetrad Stage ◽  
Ubisch Bodies ◽  
Similar Organization ◽  
Female Reproductive Organs ◽  
High Metabolic Activity

The ultrastructure of reproductive organs of pine, spruce, larch and ginkgo was investigated. It was found that the male reproductive organs possess similar organization. The most considerable change in the ultrastructure of the microsporocytes occur in meiosis. Sporoderm is being laid at the late tetrad stage. The cells of the male gameto-phyte are distinguished according to the metabolic activity of the or- ganells. They are most weakly developed in the spermiogenic cell. Ta-petum of the gymnosperms is of the periplasmodic - secretorial type. The Ubisch bodies which possess similar structure in the types investigated but are specific in details in different species are produced in tapetum.Parietal and subepidermal layers are distinguished for their high metabolic activity and are capable of the autonomous photosynthesis. Female reproductive organs differ more greatly in their struture and have the most complicated structure in primitive groups. On the first stages of their formation the inner cells of nucellus are transformed into the nucellar tapetum in which the structures similar to the Ubisch bodies taking part in the formation of the sporoderm of female gametophyte have been found.

Fine structure and possible functions of the hermaphrodite duct of some pulmonate snails (Mollusca: Gastropoda)

1990 ◽  
Vol 48 (3) ◽  
pp. 68-69
Author(s):  
Alan N. Hodgson
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Fine Structure ◽  
Seminal Vesicle ◽  
Reproductive Biology ◽  
Light Microscope ◽  
Light Microscope Level ◽  
Transmission Electron ◽  
Standard Techniques

The hermaphrodite duct of pulmonate snails connects the ovotestis to the fertilization pouch. The duct is typically divided into three zones; aproximal duct which leaves the ovotestis, the middle duct (seminal vesicle) and the distal ovotestis duct. The seminal vesicle forms the major portion of the duct and is thought to store sperm prior to copulation. In addition the duct may also play a role in sperm maturation and degredation. Although the structure of the seminal vesicle has been described for a number of snails at the light microscope level there appear to be only two descriptions of the ultrastructure of this tissue. Clearly if the role of the hermaphrodite duct in the reproductive biology of pulmonatesis to be understood, knowledge of its fine structure is required.Hermaphrodite ducts, both containing and lacking sperm, of species of the terrestrial pulmonate genera Sphincterochila, Levantina, and Helix and the marine pulmonate genus Siphonaria were prepared for transmission electron microscopy by standard techniques.

Pelvic Impairments

2018 ◽  
Vol 23 (4) ◽  
pp. 9-10
Author(s):  
James Talmage ◽  
Jay Blaisdell
Keyword(s):  
Pelvic Ring ◽  
Reproductive Organs ◽  
High Impact ◽  
Pelvic Fractures ◽  
Motor Dysfunction ◽  
Impact Event ◽  
Concomitant Injuries ◽  
Rating Process ◽  
Pass Through ◽  
A Minor

Abstract Pelvic fractures are relatively uncommon, and in workers’ compensation most pelvic fractures are the result of an acute, high-impact event such as a fall from a roof or an automobile collision. A person with osteoporosis may sustain a pelvic fracture from a lower-impact injury such as a minor fall. Further, major parts of the bladder, bowel, reproductive organs, nerves, and blood vessels pass through the pelvic ring, and traumatic pelvic fractures that result from a high-impact event often coincide with damaged organs, significant bleeding, and sensory and motor dysfunction. Following are the steps in the rating process: 1) assign the diagnosis and impairment class for the pelvis; 2) assign the functional history, physical examination, and clinical studies grade modifiers; and 3) apply the net adjustment formula. Because pelvic fractures are so uncommon, raters may be less familiar with the rating process for these types of injuries. The diagnosis-based methodology for rating pelvic fractures is consistent with the process used to rate other musculoskeletal impairments. Evaluators must base the rating on reliable data when the patient is at maximum medical impairment and must assess possible impairment from concomitant injuries.

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