scholarly journals A STUDY OF THE REPRODUCTIVE ORGANS OF THE COMMON MARINE SHRIMP, PENAEUS SETIFERUS (LINNAEUS)

1948 ◽  
Vol 94 (3) ◽  
pp. 244-262 ◽  
Author(s):  
JOSEPH E. KING
Keyword(s):  
Reproductive Organs ◽  
Penaeus Setiferus ◽  
Marine Shrimp ◽  
The Common

EARLY STAGES IN THE LIFE HISTORY OF THE COMMON MARINE SHRIMP, PENAEUS SETIFERUS (LINNAEUS)

1949 ◽  
Vol 96 (2) ◽  
pp. 168-172 ◽  
Author(s):  
WILLIAM W. ANDERSON ◽  
JOSEPH E. KING ◽  
MILTON J. LINDNER
Keyword(s):  
Life History ◽  
Early Stages ◽  
Penaeus Setiferus ◽  
Marine Shrimp ◽  
History Of ◽  
The Common

scholarly journals Mating changes the genital microbiome in both sexes of the common bedbug Cimex lectularius across populations

2020 ◽  
Vol 287 (1926) ◽  
pp. 20200302 ◽  
Author(s):  
Sara Bellinvia ◽  
Paul R. Johnston ◽  
Susan Mbedi ◽  
Oliver Otti
Keyword(s):  
Bacterial Communities ◽  
Reproductive Traits ◽  
Reproductive Organs ◽  
Cimex Lectularius ◽  
Future Studies ◽  
Sexually Transmitted ◽  
Organ Systems ◽  
Specific Organ ◽  
The Common ◽  
Induced Changes

Many bacteria live on host surfaces, in cells and in specific organ systems. In comparison with gut microbiomes, the bacterial communities of reproductive organs (genital microbiomes) have received little attention. During mating, male and female genitalia interact and copulatory wounds occur, providing an entrance for sexually transmitted microbes. Besides being potentially harmful to the host, invading microbes might interact with resident genital microbes and affect immunity. Apart from the investigation of sexually transmitted symbionts, few studies have addressed how mating changes genital microbiomes. We dissected reproductive organs from virgin and mated common bedbugs, Cimex lectularius L., and sequenced their microbiomes to investigate composition and mating-induced changes. We show that mating changes the genital microbiomes, suggesting bacteria are sexually transmitted. Also, genital microbiomes varied between populations and the sexes. This provides evidence for local and sex-specific adaptation of bacteria and hosts, suggesting bacteria might play an important role in shaping the evolution of reproductive traits. Coadaptation of genital microbiomes and reproductive traits might further lead to reproductive isolation between populations, giving reproductive ecology an important role in speciation. Future studies should investigate the transmission dynamics between the sexes and populations to uncover potential reproductive barriers.

scholarly journals Adenomyosis: correlating clinical suspicion with histopathological diagnosis in a retrospective study

2019 ◽  
Vol 8 (12) ◽  
pp. 4674
Author(s):  
Preet Kamal ◽  
Ripan Bala ◽  
Madhu Nagpal ◽  
Harleen Kaur
Keyword(s):  
Retrospective Study ◽  
Histopathological Examination ◽  
Abnormal Uterine Bleeding ◽  
Reproductive Organs ◽  
Histopathological Diagnosis ◽  
Medical Sciences ◽  
Common Causes ◽  
Chief Complaints ◽  
The Common ◽  
Chronic Cervicitis

Background: Adenomyosis and leiomyoma are the common causes of abnormal uterine bleeding (AUB). In this study it is aimed to evaluate the correlation of clinical and histopathological examination (HPE) of these entities leading to abnormal uterine bleeding.Methods: This retrospective study was carried out on hysterectomy specimens of subjects who presented themselves in the department of obstetrics and gynaecology of Sri Guru Ram Das Institute of medical sciences and research, Amritsar with chief complaints of AUB not responding to conservative treatment.Results: A total of 100 women with clinical diagnosis of AUB in which hysterectomies were performed, leiomyoma was found in 42% cases, adenomyosis in 22% cases. The most frequent combination of diagnosis was leiomyoma and adenomyosis i.e. 26%. In 9% cases chronic cervicitis and ovarian cyst were detected. In one case endometrial malignancy was found.Conclusions: Though adenomyosis and leiomyoma are clinically diagnosed along with other pathological conditions of the reproductive organs but their confirmation is still to be relied upon HPE; a most important investigation.

scholarly journals On the relation between the anterior pituitary body and the gonads.- Part II. The induction of ovulation in the anæstrous ferret

1930 ◽  
Vol 107 (748) ◽  
pp. 39-49 ◽  
Keyword(s):  
Recent Work ◽  
Breeding Season ◽  
Anterior Pituitary ◽  
Reproductive Activity ◽  
Reproductive Organs ◽  
Oestrous Cycle ◽  
Induction Of Ovulation ◽  
The Common ◽  
Reproductive Processes ◽  
Increased Activity

The factors responsible for the alternation of reproductive activity and anæstrous quiesecence are imperfectly known, but in view of much recent work on the regulation of the ovary (Smith and Engle, 1927, Zondek and aschheim, 1927), it is necessary to suppose that the anterior pituitary body is involved. On such a view anæstrus might be caused by inability of the ovary to respond to stimulation from the hypophysis, but it is more reasonable to suppose that the onset of the breeding season is due to increased activity of the anterior pituiary body, and that anæstrus results from decreased activity. In the circumstances it seemed that results of interest might be obtained by the administration of preparations containing the gonad-stimulating principles of the anterior pituitary body to animals during anæstrus. Most of the common labortory animals have no definite anæstrus, and the choice of an animal for work on anæstrus is almost limited to the ferret ot the dog. Of these, the former is obviously more suitable, especially as a considerable amount id now known about its reproductive processes. The work of Marshall (1904), Robinson (1918) and Marshall and Hammond (1930) has made it possible to make the following statements regarding the œstrous cycle in the ferret:- ( a ) The breeding season in restricted and lasts only from April to August. During the remainder of the are the reproductive organs are in a state of quiescent anæstrus.

scholarly journals Flower structure and development in Vietnamese Sciaphila (Triuridaceae: Pandanales): refined knowledge of the morphological misfit family and implications for taxonomy

PeerJ ◽  
2020 ◽  
Vol 8 ◽  
pp. e10205
Author(s):  
Maxim S. Nuraliev ◽  
Margarita V. Remizowa ◽  
Dmitry D. Sokoloff
Keyword(s):  
Reproductive Organs ◽  
Morphological Data ◽  
Sem Images ◽  
Congenital Fusion ◽  
Perianth Tube ◽  
The Common ◽  
Male Flowers ◽  
First Time ◽  
Inside Out ◽  
Comprehensive Study

The monocot family Triuridaceae is a morphological misfit with respect to several traits of floral morphology, including the uniformly apocarpous polymerous gynoecium and the famous inside-out flowers of Lacandonia. Although Triuridaceae are crucially important for understanding the floral evolution of Pandanales and angiosperms in general, significant knowledge gaps exist which hamper adequate morphological analysis of flowers in this family. The scarcity of morphological data is also reflected in numerous taxonomic inconsistencies. Here we provide a comprehensive study of reproductive organs of four species of Sciaphila occurring in Vietnam (S. arfakiana, S. densiflora, S. nana and S. stellata) including the first investigation of early floral development and gynoecium phyllotaxis. Our observations are mainly based on SEM images. We confirm the perianth (studied in male flowers) to be two-whorled and report a rare sequence of initiation of perianth parts: the outer tepals show a late congenital fusion, as their free lobes appear before the common perianth tube, whereas the inner tepals show an early congenital fusion, with their free lobes initiating on the tube rim. We interpret the stamen appendages as basal adaxial outgrowths of the stamen filaments. We discuss the number of thecae and locules in anthers of Sciaphila, and conclude that 3- and 4-, but not 2-locular anthers are characteristic of this genus. We describe the carpels as consisting of both ascidiate and plicate zones, the former being extremely short and completely obscured by anthesis. The single ovule is attached in the cross-zone. The style is non-plicate. We analyze gynoecium phyllotaxis by estimating its contact parastichies, and by investigating the number and arrangement of the outermost carpels. The carpel arrangement in a given gynoecium is a result of the balance between whorled and irregular (but not spiral) phyllotaxis. We recognize the following figures of gynoecium merism: 6, 9, 10, 10.5, 11 and 12, with the prevalence of those divisible by three. We discuss our results in the light of general diversity of floral structure of monocots. Our data allow to clarify several issues in taxonomy of Asian Sciaphila and indicate directions of further studies. We report a significant range extension for S. densiflora, which is newly recorded for the flora of Vietnam. We describe for the first time staminodes in female flowers of this species. We reveal two distinct morphs of S. nana in Vietnam. We highlight the need of a thorough revision of S. secundiflora species complex in order to verify the species boundaries and, in particular, to test the identity of the Vietnamese S. stellata.

scholarly journals Reproduction in the common shrew ( Sorex araneus Linnaeus) I—The oestrous cycle of the female

1935 ◽  
Vol 225 (518) ◽  
pp. 1-49 ◽  
Keyword(s):  
Great Britain ◽  
Common Shrew ◽  
Reproductive Organs ◽  
Sorex Araneus ◽  
Oestrous Cycle ◽  
In The Wild ◽  
The Common ◽  
Common Shrew Sorex Araneus ◽  
Reproductive Processes ◽  
Female Reproductive Organs

This paper describes the reproductive processes of the Common Shrew so far as they can be determined from animals caught in the wild state. No account seems to have been given of the oestrous cycle of this species and existing knowledge regarding its life history and breeding habits is far from adequate. This is remarkable since shrews can be obtained readily in almost any rural district on the mainland of Great Britain. An admirable summary of the earlier work is given by Barrett-Hamilton (1911), and little further information, except that provided by Middleton (1931), has been added. The embryology up to the formation of the geminal layers and the development of the placenta have been described by Hubrecht (1890, 1894). The anatomy of the shrew has been described by Ärnbäck-Christie-Linde (1907), but little attention is paid to the female reproductive organs.

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