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Spermatheca - Wikipedia, the free encyclopedia The spermatheca is an organ of the female reproductive tract in insects, some molluscs, and certain other invertebrates. They are lined with epithelium and are variable in shape; some are thin, heavily coiled tubes, others are vague outpocketings from the main reproductive tract. An apiculturist may examine the spermatheca of a queen bee to find out whether or not it has received sperm from a male. en.wikipedia.org /wiki/Spermatheca   (122 words)

Spermatheca test   (Site not responding. Last check: 2007-10-31) Spermatheca from a well mated queen is tan colored. Grasp the last two abdominal segments (where the stinger is) with either your fingers or forceps and pull this segment away from the rest of the queen. The spermatheca is buried in the mess, but is remarkably sturdy and can be squeezed out by rolling your fingers together, or between the backs of your thumbnails. members.aol.com /queenb95/sperm.html   (625 words)

JIS: Tschinkel 2.12.2002 As a consequence, the population of viable sperm detected in the spermatheca of females is a reliable predictor of fertilizations achieved in ovipositing females (Damiens et al., 2002). The quantity of sperm in the seminal vesicles of the sons and in the spermathecae of daughters of 115-day-old females was respectively 2421.0 ± 218.3 and 90.7 ± 17.6. Proportions of viable sperm in seminal vesicles of sons and spermathecae of daughters were respectively 56.7 ± 0.6% and 88.9 ± 0.9%. www.insectscience.org /3.22   (3285 words)

Relationship between larvae age and characteristics of queen honeybees (Apis mellifera L.) after single and double ... The average pre-oviposition periods were 12.41±0.028 and 13.25±0.040 days; the average queen weights at emergence were 181.8±0.43 and 172.7±0.61 mg; the average diameters of spermatheca were 0.97±0.0001 and 0.98±0.0010 mm and average numbers of spermatozoa were 4.500.000±0.09 for the queen bees of A1 and A2 groups, respectively. Thus, the queen is responsible for the color of the bees, their industry, degree of gentleness, resistance to disease, swarming tendencies, longevity, comb building propensities, and for many other colony and individual attributes [2]. Diameter of spermatheca and the number of queen reared by 3 day old was lower (p<0.05) than the queens reared 1 and 2 day old larvae. www.apiservices.com /articles/us/grafting.htm   (1750 words)

ant queen spermatheca -- ant queen spermatheca   (Site not responding. Last check: 2007-10-31) Ultrastructure of spermiogenesis, sperm, and the spermatheca in Terebrasabella heterouncinata (Polychaeta: Sabellidae: Sabellinae). Below is an example involving three dimensional reconstruction of the structure of the spermatheca of an ant queen based on serial sections. The newly mated queen sequesters a mean of 2.64 x 10 6 sperm in her spermatheca, a supply that... www.daesants.com /antqueenspermatheca   (703 words)

The Biological Bulletin -- About the Cover (February 2005, 208, (1)) Here, in the portion of the tract lying between the ovary and the oviduct, sperm are stored in a spermatheca that consists of distinct outpocketings of the oviduct epithelium. Pink oocytes near the bottom of the image are in the ovary; the central oocytes lie in the lumen of the spermatheca, surrounded by pockets containing purple-stained sperm. Oocytes are presumably inseminated when they pass from the ovary through the spermatheca to the oviduct, where they are stored in the primary oocyte stage until release. www.biolbull.org /content/vol208/issue1/cover.shtml   (437 words)

[No title] The ampulla is connected to the exterior of the worm by the ectal duct and an epidermal ectal pore. ental duct: duct-like part of the spermatheca between the ampulla and the esophagus; an open canal to the esophagus may be present. Consists of two or three main parts: ectal duct and ampulla, and sometimes an ental duct; with ectal origin in V and, rarely, also in VI; may be paired or single in species of Grania. www.inhs.uiuc.edu /~mjwetzel/Grania/glossary.html   (1643 words)

mcnallymovies Translocation of the spindle to the cortex occurs while the oocyte is in the spermatheca. In the oocyte/embryo which enters and exits the spermatheca at the beginning of this sequence, circular cytoplasmic streaming initiates after exit from the spermatheca. Exit of the oocyte/embryo from the spermatheca occurs at the beginning of this sequence. www.mcb.ucdavis.edu /faculty-labs/mcnally/mcnallymovies.htm   (873 words)

Monarchs in the Classroom   (Site not responding. Last check: 2007-10-31) Sperm are probably propelled through the sperm duct and into the spermatheca by a combination of their own movement and muscular contractions by the female. They are stored in the spermatheca until they are released to fertilize eggs, which may occur weeks or even months after mating. As the egg passes down the common oviduct, a few sperm are released from the spermatheca. www.monarchlab.umn.edu /Research/Rep/fertiliz.html   (423 words)

The Postembryonic Cell Lineages of the Hermaphrodite and Male Gonads in Caenorhabditis elegans   (Site not responding. Last check: 2007-10-31) During L3 and L4, nine somatic cells (all the cells in the somatic primordium except the anchor cell) divide to generate 140 cells for a total of 143 cells in the L4, including the distal tip cells and the anchor cell. The anterior and posterior spermathecae each arise from four cells of the somatic primordium (figure 9). The adult spermatheca is a flexible tube that is continually contorted by the muscular contractions of the proximal arm sheath and the uterus. www.wormatlas.org /Postemblingonad_1979/results.html   (3978 words)

Tropomyosin and Troponin Are Required for Ovarian Contraction in the Caenorhabditis elegans Reproductive System -- Ono ... Oocytes (asterisks) are shortly after maturation (a, d, g, and j), transported in the spermatheca (b, e, h, and k), and expelled into the uterus (c, f, i, and l). A mature oocyte is ovulated and fertilized in the spermatheca (Sp) and initiates embryogenesis in the uterus (Ut). It was pushed by intense contraction of the ovary and fertilized in the spermatheca (c). www.molbiolcell.org /cgi/content/full/15/6/2782   (5948 words)

Summary of report: Improving Queen Bee Production The newly emerged queens were open-mated and 21 days later caged and transported to the laboratory where the quality of some of their physical characteristics was determined. This involved weighing the queens and testing for (a) the numbers of ovarioles in their ovaries, (b) the numbers of spermatozoa in their spermatheca, (c) their levels of Nosema infection and, (d) their thoracic crude protein levels. No significant differences were observed in the physical characteristics of the queens banked in colonies fed the different dietary supplements with those of queens banked in colonies not fed dietary supplements. www.rirdc.gov.au /reports/HBE/04-153sum.html   (1049 words)

Reproductive Strategies of Nematodes The resulting haploid ovum may be fertilized by a male sperm as it passes through the spermatheca if copulation has occurred. Reduction divisions from 2n chromosomes to n chromosomes (meiosis) occur in the development of both spermatocytes in the male testis and oocytes in the female ovary. Copulation occurs, sperm move through the uterus where they may fertilize eggs or into the spermatheca where they fertilize the ova as they pass through. plpnemweb.ucdavis.edu /nemaplex/General/Physiology/repstrat.htm   (753 words)

Gypsy Moth Mating Success Females were dissected and their spermatheca was analyzed for the presence of sperm. The spermatheca in fertilized females was filled with sperm. The spermatheca of unfertilized females was transparent and empty. www.gypsymoth.ento.vt.edu /~sharov/mating/mating.html   (218 words)

FILE: <BC-19 In the honeybee, Lensky and Schindler (1967) found that the spermathecal gland fluid and contents of the spermatheca ranged from neutral to pH 9; and the activation of sperm was accomplished by dilution in pH 4.5 to 9.0. Flanders believed that the spermathecal gland may be stimulated by contact of the antennae, legs, or ovipositor with the medium on which the eggs are to be deposited, with variations in the condition of this medium causing variable amounts of stimulation. It is probable that the spermatheca responds only to the stimuli of certain intensities, reacting to its fullest extent or not at all. faculty.ucr.edu /~legneref/biotact/bc-19.htm   (1346 words)

BioMed Central | Full text | Oocyte production and sperm utilization patterns in semi-fertile strains of Caenorhabditis ... In this organism, it is not the supply of oocytes which limits the number of progeny that each hermaphrodite produces, but rather, the number of functional sperm that are made in the larval stage [4,5]. This is despite that fact that mutant sperm are produced in normal quantities, appear morphologically normal, activate to form crawling spermatozoa, localize correctly to the spermatheca and come in contact with oocytes [5,14]. In the spe-9 class mutants, non-functional sperm remain in the spermatheca and continue to induce high levels of oocyte maturation and ovulation (Table 1) [5-7,14]. www.biomedcentral.com /1471-213X/4/3   (3847 words)

Influence of eyestalk ablation and 5-hydroxytryptamine on the gonadal development of a female crab, Paratelphusa ... Histological study of the spermatheca at stage I reveals fused constituent layers whereas eyestalk-ablated 5-HT-treated crabs shows spermatheca having distinct constituent layers and the cross-section of the spermatheca shows rich secretory substances in the lumen and the staining intensity is more. The section of the spermatheca of the group D reveals that the three constituent layers are clearly visible. Histological sections of the spermatheca of eyestalk intact untreated female crabs show the fusion of three layers and staining reaction of the luminal contents are not intense. www.ias.ac.in /currsci/feb25/articles27.htm   (2033 words)

Revista Brasileira de Zoologia - Quitinized structures of the spermatheca of five Muscidae species (Insecta, Diptera)   (Site not responding. Last check: 2007-10-31) The morphology of the quitinized structures related to the spermatheca of five Muscidae species is described and illustrated: Atherigona orientalis Schiner, 1868; Stomoxys calcitrans (Linnaeus, 1758); Muscina stabulans (Fallén, 1817); Ophyra solitaria Albuquerque, 1958 and Hydrotaea nicholsoni Curran, 1939. The analysis of the spermatheca and allied structures of the 15 Muscidae species, representing most of the sub-families (COURI 1987) clarified some characters. 1), spermathecae: three in number, round, equal sized, surface little corrugate, many pores near base and few pores at apex. www.scielo.br /scielo.php?script=sci_arttext&pid=S0101-81752004000200017&lng=en&nrm=iso&tlng=en   (797 words)

[No title]   (Site not responding. Last check: 2007-10-31) Oocytes closest to the spermatheca are the most advanced in maturity. The dilated spermatheca is pulled over the oocyte by the contracting sheath. The spermatids formed are pushed into the spermatheca by the first oocyte during the first ovulation. www.wormatlas.org /handbook/reproductivesystem/reproductivesystem2.htm   (1581 words)

Summary of report: Introduction and early performance of queen bees - some factors affecting success Although the number of sperm in the queen`s spermatheca could be expected to be influential in extending long-term survival, it did not influence queen bee survival for the period15 weeks after introduction. The high number of mature age drones at the peak of seasonal conditions not suitable for mating with queen bees is of concern and requires further attention. There were significant differences, P<0.05, between sperm counts from spermathecae of queen bees examined at 7 and at 14 days of age, and sperm counts from spermathecae of their sister queens examined 15 weeks after introduction into honey hives. www.rirdc.gov.au /reports/HBE/03-049sum.html   (1567 words)

Schedl Lab Research Interests These changes in the oocyte are accompanied by increased contractile activity of the myoepithelial somatic sheath cells that surround the proximal end of the germ line. The oocyte is then ovulated by dilation of the distal spermatheca. Once the oocyte is ovulated into the spermatheca, it is fertilized and completes the MI and MII divisions in the uterus. www.genetics.wustl.edu /tslab/research.html   (1226 words)

Bioline International Official Site (site up-dated regularly) The proportions of fl-eye offspring broadly reflected the relative length of time that fl-eye males were present with the females, indicating multiple mating and random assortment of sperm within the spermatheca. In groups 3 and 4, where the females were mated only with red-eye males, the red-eye phenotype of the offspring was maintained (detailed results not shown), and there was no significant difference in oviposition rate or egg hatch rate when the female remained with the male or if the male was removed as oviposition began. Further work will be required to ascertain the dynamics of sperm utilization from the stock held in the spermatheca, but the indication that sperm from red-eye males may be of shorter viability compared to sperm from fl-eye males could help explain why red-eye mutants of T. www.bioline.org.br /request?oc02130   (2068 words)

Inositol 1,4,5-Trisphosphate Signaling Regulates Rhythmic Contractile Activity of Myoepithelial Sheath Cells in ... GFP is expressed in proximal and distal gonad sheath cells (arrowheads), the spermatheca (Sp), and uterine sheath cells (arrows). GFP is expressed in proximal gonad sheath cells (arrowheads), spermatheca (Sp) and uterine sheath cells (arrow). spermatheca dilation are triggered by oocytes undergoing meiotic www.molbiolcell.org /cgi/content/full/15/8/3938   (6525 words)

CHAPTER TWENTY   (Site not responding. Last check: 2007-10-31) A fair proportion of matings fail on this point, and examination of spermathecae from these failed matings shows the seminal fluids did not reach the spermatheca. One of the most direct tests of this idea would be to place radioactive arachidonic acid into spermathecae of mated females, then see if radioactive PGs turn up in their hemolymph. The overall data are consistent with transfer of radioactive arachidonic acid from male to female, followed by movement of the radioactivity from the spermatheca into the hemolymph. entomology.unl.edu /ent801/mating.html   (2855 words)

The Ptiliid Spermatheca Structure of the ptiliid female spermatheca (sperm storage organ) is of such unique design that nothing compares to it within other groups of Coleoptera. However, spermatheca design is so varied between genera, that it has proven to be a poor character when determining higher groups of taxa. The spermatheca is generally composed of a sac-like structure of variable form, possessing a spermathecal pump, a structure unique to Ptiliidae. tolweb.org /notes/?note_id=426   (234 words)

ScienceLives! Online - Biology - Sex, Flies, and Videotape Most female insects store sperm in a storage pouch called the spermatheca, and the eggs are fertilized later. To make sure their sperm fertilize the eggs, many male damselflies have a structure to scoop out the previous male's sperm from the female's spermatheca. Male migratory locusts plug the spermatheca opening so other males cannot deposit their sperm. www.sciencelives.com /insects.html   (446 words)

Results Page It is also independent of having a spermatheca or not, as can be seen by the Virgin vs Non-Virgin section of Table 1 because the non-virgins of each species copulated longer than the virgins did. Males extend copulation with a non-virgin female to extract another male’s sperm and to increase the amount of sperm inseminated, which ensures a greater chance for offspring. Thus, it is apparent that the P. latipes, the species with the largest spermatheca in the sample, also participated in the longest copulatory acts. student.biology.arizona.edu /honors2005/group06/Results.html   (360 words)

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