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52 results for “male reproductive system”
Figure 6 in Structure of the reproductive system and hectocotylus in males of lesser flying squid Todaropsis eblanae (Cephalopoda: Ommastrephidae)
Figure 6. The hectocotylus Todaropsis eblanae from (A) the shelf of Namibia [mantle length (ML) 7.6 cm, V1 maturity stage], and (B, C) the Barents Sea (ML 9.2 cm, V1 maturity stage). Scale bars: 5 mm (A, B), 1 mm (C).
Figure 5 in Structure of the reproductive system and hectocotylus in males of lesser flying squid Todaropsis eblanae (Cephalopoda: Ommastrephidae)
Figure 5. Ontogenetic variability of spermatophore length in Todaropsis eblanae (V2 maturity stage) from (A) the shelf of Mauritania [mantle length (ML) 12.1 cm, 113 spermatophores]; and (B) the shelf of Angola (ML 13.5 cm, 79 spermatophores). 1, spermatophores from the anterior part of the spermatophoric sac; 2, from the main part; 3, from the posterior part; 4, all spermatophores.
Figure 4 in Structure of the reproductive system and hectocotylus in males of lesser flying squid Todaropsis eblanae (Cephalopoda: Ommastrephidae)
Figure 4. The spermatophores of Todaropsis eblanae from (A, B) the shelf of Mauritania [mantle length (ML) 12.1 cm, V2 maturity stage]; (C, D) the Mascarene ridge (ML 14.2 cm, V2 maturity stage); and (E–G) the Barents Sea (ML 9.2 cm, V1 maturity stage). B, D, F, anterior part of cement body; G, tentative spermatophore. Scale bars: 1 mm (A, C, E), 0.5 mm (B, D, F, G).
Figure 3 in Structure of the reproductive system and hectocotylus in males of lesser flying squid Todaropsis eblanae (Cephalopoda: Ommastrephidae)
Figure 3. The spermatophoric complex of organs of Todaropsis eblanae from (A) the Barents Sea [mantle length (ML) 9.2 cm, V1 maturity stage]; (B) the shelf of Morocco (ML 11.4 cm, IV maturity stage); (C) the shelf of Namibia (ML 7.6 cm, V1 maturity stage); and (D) the Mascarene ridge (ML 14.2 cm, V2 maturity stage). Parts of SCO: sd, sperm duct; sg I–VI, spermatophoric gland parts; ss, spermatophoric sac; p(to), penis (terminal organ); f, fundus. Scale bars: 5 mm.
Figure 2 in Structure of the reproductive system and hectocotylus in males of lesser flying squid Todaropsis eblanae (Cephalopoda: Ommastrephidae)
Figure 2. Scheme of measuring of (A) hectocotylus and (B) spermatophore. Length of: 1. hectocotylized arm; 2. modified proximal part; 3. hectocotylized distal part; 4. spermatophore; 5. tread; 6. head; 7. ejaculatory tube; 8. cement body; 9. seminal reservoir; 10. posterior empty part. Width of: 11. modified proximal part; 12. coarse crests; 13. ventral membrane of distal part; 14. leaf-like plates; 15. seminal reservoir; 16. spermatophore; 17. diameter of sucker.
Figure 5 in The systematic position of the tribe Stenodemini (Heteroptera: Cimicomorpha: Miridae: Mirinae) in the light of the male internal reproductive system
Figure 5. Male reproductive system of a representative of Mirini, Adelphocoris seticornis: (A) diagram of male reproductive system; (B), (C) fragments of male reproductive system; total preparation, light microscopy (× 15). Fragments of cross sections through testis in speciesof Mirini: (D) Adelphocoris seticornis; (E) Calocoris affinis; (F) Lygus rugulipennis. Testicular follicles building the testis are visible. Hematoxylin + xylidine ponceau, light microscopy. t., testis; t.f., testicular follicles; v.d., vas deferens; v.s.d., distal seminal vesicle; g.l.e., external lateral gland; g.l.i., internal lateral gland; g.m.d., dorsal medial gland; b.e., ejaculatory bulb.
Figure 3 in The systematic position of the tribe Stenodemini (Heteroptera: Cimicomorpha: Miridae: Mirinae) in the light of the male internal reproductive system
Figure 3. Selected elements of the male reproductive system in representatives of Stenodemini. (A) Internal lateral gland of Megaloceroea recticornis, total preparation, light microscopy (× 20). Elements of the male reproductive system in species of Trigonotylus: (B) T. caelestialium, ectodermal glands, total preparation, light microscopy (× 60); (C) T. pulchellus, distal part of vas deferens, total preparation, light microscopy (× 30). v.s.p., proximal seminal vesicle; v.s.d., distal seminal vesicle; d.s., seminal duct; g.l.e., external lateral gland; g.l.i., internal lateral gland.
Figure 2 in The systematic position of the tribe Stenodemini (Heteroptera: Cimicomorpha: Miridae: Mirinae) in the light of the male internal reproductive system
Figure 2. Fragments of cross sections through the male reproductive system in selected representatives of Stenodemini. (A) Acetropis carinata, fragment of cross section through distal part of vasa deferentia and accessory glands. Cross section with mesodermal glands, ectodermal
Figure 4 in The systematic position of the tribe Stenodemini (Heteroptera: Cimicomorpha: Miridae: Mirinae) in the light of the male internal reproductive system
Figure 4. Selected elements of the male reproductive system in representatives of Stenodemini. Male reproductive system of Myrmecoris gracilis: (A) diagram of the male reproductive system; (B) total preparation, light microscopy (× 40); (C) distal part of vas deferens, total preparation, light microscopy (× 40). Male reproductive system of Notostira elongata: (D) internal lateral gland, total preparation, light microscopy (× 40); (E) diagram of the male reproductive system; (F) total preparation, light microscopy (× 40). t., testis; v.d., vas deferens; v.s.p., proximal seminal vesicle; v.s.d., distal seminal vesicle; d.s., seminal duct; g.l.e., external lateral gland; g.l.i., internal lateral gland; b.e., ejaculatory bulb.
Figure 1 in The systematic position of the tribe Stenodemini (Heteroptera: Cimicomorpha: Miridae: Mirinae) in the light of the male internal reproductive system
Figure 1. Fragments of cross sections through the testis of Stenodemini species. (A) Acetropis carinata; (B) Dolichomiris linearis; (C) Leptopterna ferrugata; (D) Leptopterna dolabrata;
Detection Rate of SARS-CoV-2 in Male Genitourinary System and Its Impact on Male Reproductive Health.
ClinicalTrials.gov study NCT04388631. IPD Sharing: YES. Countries: 1. Publications: 4.
The intensity of sexual selection, body size and reproductive success in a mating system with male-male combat: Is bigger better?
Open the record for dataset details and reuse information.
Data from: Precopulatory but not postcopulatory male reproductive traits diverge in response to mating system manipulation in Drosophila melanogaster
Competition between males creates potential for pre- and postcopulatory sexual selection and conflict. Theory predicts that males facing risk of sperm competition should evolve traits to secure their reproductive success. If those traits are costly to females, the evolution of such traits may also increase conflict between the sexes. Conversely, under the absence of sperm competition, one expectation is for selection on male competitive traits to relax thereby also relaxing sexual conflict. Experimental evolution studies are a powerful tool to test this expectation. Studies in multiple insect species have yielded mixed and partially conflicting results. In this study, we evaluated male competitive traits and male effects on female costs of mating in Drosophila melanogaster after replicate lines evolved for more than 50 generations either under enforced monogamy or sustained polygamy, thus manipulating the extent of intrasexual competition between males. We found that in a setting where males competed directly with a rival male for access to a female and fertilization of her ova polygamous males had superior reproductive success compared to monogamous males. When comparing reproductive success solely in double mating standard sperm competition assays, however, we found no difference in male sperm defense competitiveness between the different selection regimes. Instead, we found monogamous males to be inferior in precopulatory competition, which indicates that in our system, enforced monogamy relaxed selection on traits important in precopulatory rather than postcopulatory competition. We discuss our findings in the context of findings from previous experimental evolution studies in Drosophila ssp. and other invertebrate species.
FIGURE 5 in On some mites (Acari: Prostigmata) from the Interior Highlands: descriptions of the male, immature stages, and female reproductive system of Pseudocheylus americanus (Ewing, 1909) and some new state records for Arkansas
FIGURE 5. Pseudocheylus americanus (Ewing, 1909), protonymph, dorsum.
FIGURE 6 in On some mites (Acari: Prostigmata) from the Interior Highlands: descriptions of the male, immature stages, and female reproductive system of Pseudocheylus americanus (Ewing, 1909) and some new state records for Arkansas
FIGURE 6. Pseudocheylus americanus (Ewing, 1909), larva, dorsum.
FIGURE 1 in On some mites (Acari: Prostigmata) from the Interior Highlands: descriptions of the male, immature stages, and female reproductive system of Pseudocheylus americanus (Ewing, 1909) and some new state records for Arkansas
FIGURE 1. Pseudocheylus americanus (Ewing, 1909). Stereomicrographs of specimens in ethanol.
Figure 7 from: Nowińska A, Mróz E, Depa Ł (2017) Sexual morphs of Pterocomma tremulae Börner, 1940 (Aphididae, Aphidinae) with description of male reproductive system. ZooKeys 686: 125-136. https://doi.org/10.3897/zookeys.686.14493
Figure 7 - Male reproductive system of P. tremulae: A longitudinal section through testicles B, C, D cross sections through testicles; ag – accessory gland, cec – cuboidal epithelial cells, tf – testicular follicles, vd – vas deferens.
Figure 6 from: Nowińska A, Mróz E, Depa Ł (2017) Sexual morphs of Pterocomma tremulae Börner, 1940 (Aphididae, Aphidinae) with description of male reproductive system. ZooKeys 686: 125-136. https://doi.org/10.3897/zookeys.686.14493
Figure 6 - Male reproductive system of P. tremulae: A, B cross sections through testes; tf – testicular follicles, tfc – testicular follicle cysts.
Figure 5 from: Nowińska A, Mróz E, Depa Ł (2017) Sexual morphs of Pterocomma tremulae Börner, 1940 (Aphididae, Aphidinae) with description of male reproductive system. ZooKeys 686: 125-136. https://doi.org/10.3897/zookeys.686.14493
Figure 5 - Morphology of the male reproductive system of P. tremulae: A young specimen B mature specimen; ag – accessory gland, tf – testicular follicles, vd – vas deferens.
Figure 4 from: Nowińska A, Mróz E, Depa Ł (2017) Sexual morphs of Pterocomma tremulae Börner, 1940 (Aphididae, Aphidinae) with description of male reproductive system. ZooKeys 686: 125-136. https://doi.org/10.3897/zookeys.686.14493
Figure 4 - Morphological features of the male: A antenna with multiple secondary rhinaria B marginal plates and stigmal pores C siphunculus D genital apparatus with parameres and membranous aedeagus.
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Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.