scholarly journals The Reproductive System and Ovarian Development of the Adult Olive Psylla Euphyllurα phillyreαe Foerster (Homoptera: Aphalaridae)

2017 ◽  
Vol 12 ◽  
pp. 37 ◽  
Author(s):  
D. Α. Prophretou-Athanasiadou ◽  
M.E Tzanakakis
Keyword(s):  
Reproductive System ◽  
Ovarian Development ◽  
Size And Shape ◽  
Adult Females ◽  
Olive Psylla

The gross morphology of the reproductive system of adult females and males of the olive psylla Euphyllurα phillyreαe Foerster (Homoptera: Aphalaridae) is given. Five stages of ovarian development are distinguished and described, based on the size and shape of the ovaries and ovarioles, on the separation of the vitellarium from the germarium, and on the appearance and shape of oocytes.

A neotype for Cephalobus persegnis Bastian, 1865, redescription of the species, and observations on variability in taxonomic characters

1970 ◽  
Vol 48 (3) ◽  
pp. 457-469 ◽  
Author(s):  
R. V. Anderson ◽  
D. J. Hooper
Keyword(s):  
Reproductive System ◽  
Single Point ◽  
Type Locality ◽  
Taxonomic Significance ◽  
Male Tail ◽  
Size And Shape ◽  
Adult Females ◽  
Rectal Glands ◽  
Males And Females

Amendment of the description of males and females of Cephalobus persegnis includes variation in the form of the probolae, reproductive system, and tail, and in the number and position of the lateral papillae on the male tail. Size and shape of the dorsal and subventral rectal glands also differed within and between sexes. Form of the probolae of topotypes and their progeny reared on agar and in sand ranged from low-rounded, when amalgamated with the duplex lips, to asymmetrically bifurcate. Sometimes probolae became conoid in shape, ending in a single point. Significance of the presence or absence and the form of labial probolae in taxonomy of Cephalobus and in its relationships to the Acrobelinae, particularly Chiloplacus Thorne, 1937 and Paracephalobus Akhtar, 1962, is discussed. Chiloplacus trilineatus Steiner, 1940 is synonymized with C. persegnis. Chiloplacus quinilineatus Shavrov, 1968 is transferred to Cephalobus. Configuration of the ovary in adult females is not considered to be of taxonomic significance. The ovary is not always flexed, and, when flexed, the number of flexures varies from one to six. The neotype of C. persegnis was selected from specimens collected from the type locality.

scholarly journals Dynamics of ovarian maturation during the reproductive cycle of Metynnis maculatus, a reservoir invasive fish species (Teleostei: Characiformes)

2013 ◽  
Vol 11 (4) ◽  
pp. 821-830 ◽  
Author(s):  
Thiago Scremin Boscolo Pereira ◽  
Renata Guimarães Moreira ◽  
Sergio Ricardo Batlouni
Keyword(s):  
Reproductive Cycle ◽  
Ovarian Development ◽  
Gonadosomatic Index ◽  
Ovarian Maturation ◽  
Invasive Fish ◽  
Multiple Spawning ◽  
Adult Females ◽  
The Mean ◽  
Ovulatory Follicles ◽  
Morphometric Evaluation

In this study, we evaluated the dynamics of ovarian maturation and the spawning processes during the reproductive cycle of Metynnis maculatus. Adult females (n = 36) were collected bimonthly between April 2010 and March 2011. The mean gonadosomatic index (GSI) was determined, ovarian and blood samples were submitted for morphometric evaluation and the steroid plasma concentration was determined by ELISA. This species demonstrated asynchronous ovarian development with multiple spawns. This study revealed that, although defined as a multiple spawning species, the ovaries of M. maculatus have a pattern of development with a predominance of vitellogenesis between April and August and have an intensification in spawning in September; in October, a drop in the mean GSI values occurred, and the highest frequencies of post-ovulatory follicles (POFs) were observed. We observed a positive correlation between the POF and the levels of 17α-hydroxyprogesterone. Metynnis maculatus has the potential to be used as a source of pituitary tissue for the preparation of crude extracts for hormonal induction; the theoretical period for use is from September to December, but specific studies to determine the feasibility of this approach must be conducted.

scholarly journals The Female Reproductive Cycle of the Bedriaga Plate-Tailed Gecko,Teratoscincus bedriagai(Sauria: Gekkonidae) in Iran

2014 ◽  
Vol 2014 ◽  
pp. 1-6
Author(s):  
Fatemeh Mojibi ◽  
Vida Hojati
Keyword(s):  
Reproductive Cycle ◽  
Reproductive System ◽  
Reproductive Activity ◽  
Eastern Desert ◽  
Central Plateau ◽  
Oocyte Growth ◽  
Adult Females ◽  
Significant Difference ◽  
Desert Regions ◽  
Semnan Province

The Bedriaga Plate-tailed Gecko,Teratoscincus bedriagaiNikolsky, 1900, is distributed in the northern and eastern desert basins of the Central Plateau of Iran, Sistan, and the desert regions of southern Afghanistan. Iranian specimens are believed to be rare in collections. In this study, the reproductive cycle of this species has been investigated through focusing on oogenesis from 5 April to 5 August, 2013. Generally, 15 adult females were collected by hand at midnight from southern parts of Damghan County, situated in Semnan Province of Iran. Ovaries were removed and processed for the purpose of histological and morphometric studies. The results revealed that oocyte growth starts in early April and terminates in late July. Moreover, mating commences in spring, especially at the beginning of May, with oviposition occurring from late May to late July. Approximately, 1 to 2 eggs are laid by females per clutch with the possibility of producing a secondary clutch later in the season. The maximum reproductive activity takes place in May and continues with a decreasing trend in June and more reduction in July and finally ends in August. No significant difference was observed between right and left side of reproductive system. Therefore, oogenesis occurs from April to July, whileT. bedriagaifollows an oogenic cycle typical for temperate species.

Nesting Biology and Taxonomy of Arpactophilus-Mimi, a New Species of Social Sphecid (Hymenoptera, Sphecidae) From Northern Australia

1988 ◽  
Vol 36 (5) ◽  
pp. 585 ◽  
Author(s):  
RW Matthews ◽  
ID Naumann
Keyword(s):  
National Park ◽  
Ovarian Development ◽  
Brood Care ◽  
Northern Australia ◽  
Nesting Biology ◽  
Selective Pressures ◽  
Nest Sites ◽  
Adult Females ◽  
Single Nest ◽  
A New Species

Arpactophilus mimi, Naumann, sp. nov., is described from Kakadu National Park, N.T. and its biology is outlined. A. mimi nests in abandoned cells of mud-dauber wasps in sandstone overhangs. Its nests are lined heavily with silk and contain 1-15 cells and 1-10 adult wasps (1-7 females, 0-3 males). On average nests contain 5.2 cells and 2.75 adult females. Prey (immature Psyllidae and Tingidae) are supplied progressively. Nests are parasitised by a species of megalyrid wasp, but incidence of parasitism is low. Nest defense is both physical (entrance guard always present) and chemical (citrus odour from heads of both sexes). Females from a single nest could be ranked on the basis of relative ovarian development, suggesting that more than one female oviposits. Females apparently cooperate in brood care and offspring in a nest develop asynchronously. The biology of A. mimi is compared to that of Microstigmus comes Krombein, the most socially advanced sphecid known, and selective pressures that may have acted to promote female cooperation in the two genera are discussed. For A. mimi the lack of available nest sites could be an important factor restricting the ability of offspring to disperse and establish nests.

Chemotherapy of Filariasis -On the Search of New Agents Effective on the Reproductive System of Female Adult Worms

1990 ◽  
Vol 45 (11-12) ◽  
pp. 1210-1214 ◽  
Author(s):  
Jujhar Singh ◽  
M. Seth ◽  
Nigar Fatma ◽  
Satyavan Sharma ◽  
A. P. Bhaduri ◽  
...  
Keyword(s):  
Adult Female ◽  
Reproductive System ◽  
Female Reproduction ◽  
Female Adult ◽  
New Agents ◽  
Male And Female ◽  
Design And Synthesis ◽  
Adult Females ◽  
The Future ◽  
Cotton Rats

The design and synthesis of a series of alkyl 5(6)-substituted benzimidazole-2-carbamates (1-13), 7-chloro-4-(4-substituted phenyl)aminoquinolines (14-16), l,2-dim ethyl-3-m ethoxycarbonyl- 4,5-disubstituted pyrroles (17-19) and some compounds belonging to the class pimelonitrile (20), dihydroquinoline (21), pyridine (22), pyridoquinoline (23) and tetrahydropyrimidine (24) have been carried out as possible antifilarial agents. All these compounds have been evaluated for their activity against male and female adult worms of Litomosoides carinii in cotton rats. The effect of these compounds was also observed on the reproductive system (condition of developing microfilariae and their release from uterus) of adult female worms. In this study, three types of compounds were discovered: (a) those which showed activity on both the male and female adult worms and also had sterilizing effects on surviving adult females (1 -3 , 6 - 9 , 13, 19), (b) those which only sterilized the adult females (14-16 , 21, 24), and (c) those which had no effect on female reproduction but killed only adult worms (4, 5, 11, 12, 17,18, 20, 22, 23). This tends to open up a new avenue in the chemotherapy of filariasis and the future scope of work on chemosterilization of adult females has been discussed.

Effects of cyclohexamide and hydroxyurea on mating behavior and its development in the free-living nematode Panagrellus silusiae (de Man 1913) Goodey, 1945

1972 ◽  
Vol 50 (3) ◽  
pp. 333-336 ◽  
Author(s):  
Ronald Cheng ◽  
M. R. Samoiloff
Keyword(s):  
Reproductive System ◽  
Sexual Attraction ◽  
Copulatory Behavior ◽  
Postembryonic Development ◽  
Free Living ◽  
Complete Development ◽  
Adult Females ◽  
Free Living Nematode ◽  
Attraction System ◽  
De Man

Females of the free-living dioecious nematode Panagrellus silusiae that have undergone postembryonic development in hydroxyurea do not attract males, and treated males do not respond to normal females. Nematodes placed in hydroxyurea as adults have normal gonads and retain the sexual attraction system. Hydroxyurea has no effect upon copulatory behavior of adult animals. Treatment of adult females with actidione stops production of attractant, although production resumes within 24 h after removal of the females from actidione. Actidione treatment of males has no effect upon the response to attractant by males or on copulation. It is proposed that sexual attraction depends on complete development of the reproductive system, but that copulation does not.

Unbiased estimation of particle number and sizes using the new stereological tools: the disector, the fractionator, the selector, and the nucleator — or just point-sampled intercepts

1988 ◽  
Vol 46 ◽  
pp. 428-429
Author(s):  
H.J.G. Gundersen
Keyword(s):  
Particle Number ◽  
Small Distance ◽  
Parallel Plane ◽  
Unbiased Estimation ◽  
Severe Problem ◽  
New Era ◽  
Size And Shape ◽  
Distinct Property ◽  
Sectioned Tissue

Previously, all stereological estimation of particle number and sizes were based on models and notoriously gave biased results, were very inefficient to use and difficult to justify. For all references to old methods and a direct comparison with unbiased methods see recent reviews.The publication in 1984 of the DISECTOR, the first unbiased stereological probe for sampling and counting 3—D objects irrespective of their size and shape, signalled the new era in stereology — and give rise to a number of remarkably simple and efficient techniques based on its distinct property: It is the only known way to obtain an unbiased sample of 3-D objects (cells, organelles, etc). The principle is simple: within a 2-D unbiased frame count or sample only cells which are not hit by a parallel plane at a known, small distance h.The area of the frame and h must be known, which might sometimes in itself be a problem, albeit usually a small one. A more severe problem may arise because these constants are known at the scale of the fixed, embedded and sectioned tissue which is often shrunken considerably.

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