Renewable fecundity of male Aedes aegypti following replenishment of seminal vesicles and accessory glands

1975 ◽  
Vol 21 (5) ◽  
pp. 1085-1090 ◽  
Author(s):  
Woodbridge A. Foster ◽  
Arden O. Lea
Keyword(s):  
Aedes Aegypti ◽  
Seminal Vesicles ◽  
Accessory Glands

Copulation and Egg-Production in Rhodnius Prolixus: the Role of the Spermathecae

1965 ◽  
Vol 42 (3) ◽  
pp. 373-378
Author(s):  
K. G. DAVEY
Keyword(s):  
Egg Production ◽  
Rhodnius Prolixus ◽  
Seminal Vesicles ◽  
Primary Stimulus ◽  
Accessory Glands ◽  
Normal Males ◽  
Mated Female

1. Mated females of Rhodnius prolixus lay eggs at approximately twice the rate of unmated females. 2. Males which have had their seminal vesicles or opaque accessory glands removed produce spermatophores at mating, but no spermatozoa appear in the spermathecae of the females. The females involved in such matings do not exhibit an increase in egg-production. 3. When females lacking their spermathecae are mated to normal males, the increase in egg production which follows normal matings does not materialize. 4. Implanting spermathecae from mated females into virgin females increases the egg-production of the host. Implanting spermathecae from virgin females or seminal vesicles or transparent accessory glands from males has no effect on the egg-production of the donor. 5. It is tentatively concluded that a blood-borne factor from the spermathecae containing spermatozoa is the primary stimulus to increased egg production in a mated female.

Morphometry of the testis follicles in Triatoma rubrofasciata (De Geer, 1773) (Hemiptera, Triatominae)

2007 ◽  
Vol 57 (4) ◽  
pp. 393-400 ◽  
Author(s):  
Teresa Cristina Monte Gonçalves ◽  
Simone Patrícia Carneiro Freitas ◽  
Jacenir Reis Dos Santos-Mallet ◽  
José Eduardo Serrão ◽  
Elias Seixas Lorosa
Keyword(s):  
Phylogenetic Analysis ◽  
Reproductive Tract ◽  
Common Ancestor ◽  
Ejaculatory Duct ◽  
Seminal Vesicles ◽  
Male Reproductive Tract ◽  
Accessory Glands ◽  
Morphometrical Analysis ◽  
Left And Right ◽  
Triatoma Rubrofasciata

AbstractThe male reproductive tract in Triatominae has a pair of testes, two vasa deferentia, a pair of seminal vesicles, four pairs of accessory glands, and an ejaculatory duct, which opens in the aedeagus. In species of the genus Triatoma each testis is formed by seven testicular follicles. Because Triatoma rubrofasciata has a common ancestor with species of Triatoma occurring in North America and because the length of testis follicles varies among different species of Triatoma a morphometrical analysis of the follicles was conducted. Triatoma rubrofasciata has seven testis follicles of variable length that are similar between left and right testes. The statistics allowed the classification in a long follicle, two medium follicles, two that are short, and two that are very short. This finding is compared with data available for other Triatominae and it is emphasized that the length of follicles testis should be included in future phylogenetic analysis of Triatominae.

EVALUATION OF ANDROGENIC AND GONADOTROPHIC ACTIVITY IN MALE TWIN CALVES BY ANALYSIS OF SEMINAL VESICLES AND SEMEN

1960 ◽  
Vol 21 (3) ◽  
pp. 361-NP ◽  
Author(s):  
T. MANN ◽  
L. E. A. ROWSON ◽  
MARY F. HAY
Keyword(s):  
Citric Acid ◽  
Secretory Activity ◽  
Seminal Vesicles ◽  
Similar Response ◽  
Accessory Glands ◽  
Bull Calves ◽  
Androgenic Activity ◽  
Series Of Experiments ◽  
Androgenic Effect ◽  
Male Twin

SUMMARY A series of experiments is reported on the evaluation of the androgenic activity in the male by analysis of semen and accessory glands of reproduction. In pubescent male twin calves the onset of the secretory function of seminal vesicles, as reflected in the appearance of fructose and citric acid in ejaculates, was advanced by injections of chorionic gonadotrophin. However, in much younger bull calves, gonadotrophin was incapable of evoking a similar response. On the other hand, testosterone injected into immature animals readily induced high secretory activity in the seminal vesicles. When androstenedione was injected into castrated bull calves, its androgenic effect on the fructose and citric-acid formation in the seminal vesicles was negligible by comparison with the powerful stimulating influence of testosterone. This probably explains why in young bull calves fructose and citric acid are not secreted by the seminal vesicles until the testicular content of testosterone markedly exceeds that of androstenedione. Underfeeding of young maturing bull calves not only delays the onset of secretory activity in the seminal vesicles as a result of decreased androgenic activity of the testes but also diminishes the responsiveness of the seminal vesicles to testosterone.

scholarly journals Sexual selection affects the sizes of the mammalian prostate gland and seminal vesicles

2009 ◽  
Vol 55 (1) ◽  
pp. 1-8 ◽  
Author(s):  
Matthew J. Anderson ◽  
Alan F . Dixson
Keyword(s):  
Body Weight ◽  
Sexual Selection ◽  
Prostate Gland ◽  
Morphological Diversity ◽  
Seminal Vesicles ◽  
Data Set ◽  
Chemical Complexity ◽  
Accessory Glands ◽  
Accessory Reproductive Glands ◽  
Testes Size

Abstract The accessory reproductive glands of male mammals contribute the bulk of the secretions in which spermatozoa are transported to the female tract during copulation. Despite their morphological diversity, and the chemical complexity of their products, little is known about the possible effects of sexual selection upon these glands in mammals. Here we consider the seminal vesicles and prostate glands in a sample of 89 species and 60 genera representing 8 Orders of mammals. The sizes of the accessory glands are analysed in relation to body weight and testes weight. Both the seminal vesicles size and prostate size (corrected for body weight) correlate positively with relative testes size in this sample; this finding remains highly significant after application of procedures to correct for possible phylogenetic biases in the data set. The accessory reproductive glands are also significantly larger in those mammals which have large relative testes sizes, and in which the likelihood of sperm competition is greatest. These results support the hypothesis that sexual selection has played an important role in the evolution of the mammalian prostate gland and seminal vesicles.

scholarly journals External quality assessment program for biochemical assays of human seminal plasma: a French 6-years experience

2020 ◽  
Vol 30 (1) ◽  
Author(s):  
Safouane M. Hamdi ◽  
Erick Sanchez ◽  
Delphine Garimbay ◽  
Stéphanie Albarede
Keyword(s):  
Quality Assessment ◽  
Seminal Plasma ◽  
External Quality Assessment ◽  
Prostatic Acid Phosphatase ◽  
Seminal Vesicles ◽  
Human Seminal Plasma ◽  
External Quality ◽  
Iso 15189 ◽  
Accessory Glands ◽  
Health Authorities

Abstract Background In 1999, despite a longstanding use, the WHO manual for the examination of human semen finally proposed to assay several biochemical components of the seminal plasma for a functional exploration of the male accessory glands. At the same time, an international effort was made to standardize laboratory tests and to increase their performance through ISO 15189 accreditation. In this setting, participation to relevant external quality assessment (EQA) schemes is an essential requirement for laboratories. To fulfil this injunction, we have organized an EQA program for seminal biochemistry using presumed commutable samples. In this study, we aimed to report an overview of the French laboratory offer, the kinds of assays used, their performance as well as their likelihood of satisfying ISO15189 requirements for EQA. Results Between 2014 and 2019, we performed seven surveys. A median of six laboratories participated to each survey giving a ratio of one laboratory per 11.2 million inhabitants. Seven biomarkers are routinely assayed but the core set shared by all laboratories comprised citrate and zinc (prostate), fructose (seminal vesicles) and α-1, 4 glucosidase (epididymis). The use of CE-IVD marked methods concerned between 0 to 75% of overall assays. According to analytical specifications, 100% of laboratories results were compliant for zinc, 75% for citrate and α-1,4 glucosidase and 67% for fructose. By combining overall data in an empirical scoring system, we identified several types of seminal biomarkers: citrate, fructose and zinc appear as good candidates for a full accreditation, α-1,4 glucosidase still presents an analytical weakness, but prostatic acid phosphatase, free L-carnitine and glycerophosphocholine cannot be accredited in the current state. Conclusions We organized the first French EQA program for seminal biochemistry to help local laboratories to face their legal requirement to be fully accredited by 2020. It could be improved still further but it gave us an oversight on the analytic landscape. Effective methods are available for a confident biochemical exploration of prostate and seminal vesicles. However, that of epididymis appeared unexpectedly fragile. This andrological issue should be addressed by dedicated recommendations from health authorities and scientific societies.

The anatomy and physiology of the morabine grasshoppers IV. proteins and pigments in solution

1969 ◽  
Vol 17 (4) ◽  
pp. 687 ◽  
Author(s):  
RE Blackith ◽  
RM Blackith
Keyword(s):  
Cellulose Acetate ◽  
Esterase Activity ◽  
Species Group ◽  
Seminal Vesicles ◽  
Yellow Pigment ◽  
Polyacrylamide Gels ◽  
Protein Distribution ◽  
Green Pigment ◽  
Anatomy And Physiology ◽  
Accessory Glands

The haemolymph of morabine grasshoppers (Orthoptera : Eumastacidae) contains a green and a yellow pigment, each attached to one or more proteins. The distribution of proteins has been investigated by electrophoresis on polyacrylamide gels and on cellulose acetate strips. The distribution of proteins in the blood of the green phenotypes of some groups of species differs markedly from that in the non-green (grey, brown, and yellow) phenotypes; the green pigment is consistently attached to one group of proteins in the green phenotypes of one group of species whereas it is attached to another group of proteins in non-green phenotypes of the same species group. In some morphs there are two bands of pigment. The yellow pigment is attached to a late-running group of proteins irrespective of the nature of the phenotype. There are marked differences of protein distribution, and of the attachment of the pigments to proteins in morabines, as compared with a pyrgomorphid and two acridid grasshoppers. Altogether, 36 bands have been recognized in the haemolymph of morabines, and several of these bands show esterase activity. At least 25 bands are secreted by the largest of the male accessory glands, but none seem to persist when the contents of the gland are ejaculated into the female spermatheca. The seminal vesicles of the male do not secrete appreciable amounts of protein.

FUNCTIONS OF THE MALE ACCESSORY GLAND SECRETIONS OF AEDES MOSQUITOES (DIPTERA: CULICIDAE): TRANSPLANTATION STUDIES

1976 ◽  
Vol 108 (9) ◽  
pp. 955-960 ◽  
Author(s):  
S. Ramalingam ◽  
G. B. Craig
Keyword(s):  
Aedes Aegypti ◽  
Secretory Granules ◽  
Accessory Gland ◽  
Anterior Region ◽  
Male Accessory Gland ◽  
Male Accessory Glands ◽  
Accessory Glands ◽  
Aedes Mosquitoes ◽  
Species Specific

AbstractIn Aedes aegypti, the ’matrone’ substance which caused mating inhibition and stimulated oviposition in females, was present in the anterior secretory region of the male accessory glands. In the divided accessory glands of male A. triseriatus, however, it was present in the posterior glands. The posterior gland substance in A. triseriatus was not species specific. It stimulated oviposition in A. aegypti and caused mating inhibition in A. atropalpus. The secretory substance of the posteriormost region in the glands of both species of mosquitoes was mucin in nature. This mucin substance effectively glued the secretory granules of the anterior region(s).

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