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Figure 2 in Cephalopods in the potential prey field of sperm whales (Physeter macrocephalus) (Cetacea: Physeteridae) in the northern Gulf of Mexico
Figure 2. Sperm whale acoustic prey survey stations map, January–March 2010.
Data from: Reproductive interference hampers species coexistence despite conspecific sperm precedence
<p>Negative interspecific mating interactions, known as reproductive interference, can hamper species coexistence in a local patch and promote niche partitioning or geographical segregation of closely related species. Conspecific sperm precedence (CSP), which occurs when females that have mated with both conspecific and heterospecific males preferentially use conspecific sperm for fertilization, might contribute to species coexistence by mitigating the costs of interspecific mating and hybridization. We discussed whether two species exhibiting CSP can coexist in a local environment in the presence of reproductive interference. First, using a behaviourally explicit mathematical model, we demonstrated that two species characterized by negative mating interactions are unlikely to coexist because the costs of reproductive interference, such as loss of mating opportunity with conspecific partners, are inevitably incurred when individuals of both species are present. Second, we experimentally examined differences in mating activity and preference in two <i>Harmonia</i> ladybird species known to exhibit CSP. According to the developed mathematical model of reproductive interference, these behavioural differences should lead to local extinction of <i>H. yedoensis</i> because of reproductive interference by <i>H. axyridis</i>. This prediction is consistent with field observations that <i>H. axyridis</i> uses various food sources and habitats whereas <i>H. yedoensis</i> is confined to a less preferred prey item and a pine tree habitat. Finally, by a comparative approach, we showed that niche partitioning or parapatric distribution, but not sympatric coexistence in the same habitat, is maintained between species with CSP belonging to a wide range of taxa, including vertebrates and invertebrates living in aquatic or terrestrial environments. Taken together, we suggest that reproductive interference can destabilize local coexistence even in closely related species that exhibit CSP.</p>
Figure 11 in Killer sperm whale: a new basal physeteroid (Mammalia, Cetacea) from the Late Miocene of Italy
Figure 11. Anterior process of the periotic of (A) Zygophyseter varolai gen. et sp. nov. (holotype, MAUL 229/ 1), (B) Physeter macrocephalus (MNHNP 1831), (C) Kogia breviceps (MBMS 4000), (D) Physeteroidea indet. from Pietra leccese (MAUL 982/1), (E) Lagenorhynchus albirostris (MSNTUP M291) and (F) Mesoplodon bowdoini (MSNTUP M269). The black line delineates the accessory ossicle.
Figure 12 in Killer sperm whale: a new basal physeteroid (Mammalia, Cetacea) from the Late Miocene of Italy
Figure 12. Zygomatic process of squamosal of (A) Zygophyseter varolai gen. et sp. nov. (holotype, MAUL 229/1), (B) Physeter macrocephalus (MSNTUP M266), (C) Kogia breviceps (MNHNP 1877-277), (D) Tursiops truncatus (MSNTUP M281), (E) Indopacetus pacificus (MZUF 1956 M4854), (F) Pontoporia blainvillei (MSNTUP M273) and (G) Zygorhiza kochii (cast of USNM 11962; mirror image of right side). The white line marks the dorsal margin of the zygomatic process.
Fig. 6 in Spermatic characteristics and sperm evolution on the subfamily Stevardiinae (Ostariophysi: Characiformes: Characidae)
Fig. 6. Spermatozoa of Bryconamericus exodon. A-E: Longitudinal sections of spermatozoa. Note the lateral position of the nucleus (n) in relation to the flagellar axis and to proximal (p) and distal (d) centrioles, the position of the double nuclear fossa (double arrow), the mitochondria and the endomembrane system of the midpiece and the cytoplasmic canal (*) containing the initial segment of the flagellum (f). A-Inset: Detail of the position, shape and depth of the nuclear fossa, and the position of the centrioles to one another and to the nuclear fossa. F-L: Cross sections from the middle to the base of the nucleus and at different levels of the strongly asymmetric midpiece exposing the lateral position of the cytoplasmic canal (*) and of the flagellum (f), the distribution of the few elongate mitochondria (m) accumulated in larger portion of the midpiece and the lacy aspect of endomembrane system (v). L-Inset: Cross section of the flagellum with the classic axoneme (a).
Fig. 10 in Spermatic characteristics and sperm evolution on the subfamily Stevardiinae (Ostariophysi: Characiformes: Characidae)
Fig. 10. Spermatozoa of Hemibrycon surinamensis. A: Longitudinal section of spermatozoa. Note the lateral position of the nucleus (n) in relation to the flagellar axis and to proximal (p) and distal (d) centrioles, the eccentric position of the double nuclear fossa (double arrow), the midpiece containing a few vesicles (v), and the cytoplasmic canal (*) containing the initial segment of the flagellum (f). B-E: Cross sections through the middle of the nucleus and at different levels of the strongly asymmetric midpiece exposing the lateral position of the centriole (c), cytoplasmic canal (*) and of the flagellum (f), the distribution of the few elongate mitochondria (m) accumulated in larger portion of the midpiece. F: Cross section of the flagellum with classic axoneme (a).
Supplementary material 1 from: Thüler K, Blanckenhorn WU, Ward PI, Lüpold S, Bussière LF (2021) Female accessory gland fluid promotes sperm survival in yellow dung flies. Alpine Entomology 5: 95-100. https://doi.org/10.3897/alpento.5.68501
Table S1
Figure 1 from: Thüler K, Blanckenhorn WU, Ward PI, Lüpold S, Bussière LF (2021) Female accessory gland fluid promotes sperm survival in yellow dung flies. Alpine Entomology 5: 95-100. https://doi.org/10.3897/alpento.5.68501
Figure 1 Proportion of sperm from 30 random Scathophaga stercoraria males remaining alive after in vitro paired treatment with female accessory gland fluid vs. buffer control (red dot = overall mean). Proportions were based on absolute counts of live and dead sperm, which could be distinguished by stain colour, across 20 equal-sized images per male.
FIGURE 6 in Bundles of Sperm: Structural Diversity in Scorpion Sperm Packages Illuminates Evolution of Insemination in an Ancient Lineage
FIGURE 6. Sperm packages of Bothriuridae Simon, 1880 imaged with light microscopy (A–C, H, I, L) and scanning electron microscopy (D–G, K). A. Urophonius tregualemuensis Cekalovic, 1981: canelike. B. Urophonius brachycentrus (Thorell, 1876): canelike. C. Cercophonius squama (Gervais, 1843): canelike. D. Phoniocercus pictus Pocock, 1893: canelike. E. Tehuankea moyanoi Cekalovic, 1973: canelike. F. Centromachetes pocockii (Kraepelin, 1894): straight. G. Bothriurus cordubensis Acosta, 1995: canelike. H. Bothriurus bonariensis (C.L. Koch, 1842): canelike. I. Bothriurus bocki Kraepelin, 1911: bent. J, K. Timogenes elegans (Mello-Leitão, 1931): bent, annular. L. Vachonia martinezi Abalos, 1954: bent. Scale bars: 25 µm.
FIGURE 2 in Bundles of Sperm: Structural Diversity in Scorpion Sperm Packages Illuminates Evolution of Insemination in an Ancient Lineage
FIGURE 2. Sperm packages of Buthidae C.L. Koch, 1837 (A–E), Chaerilidae Pocock, 1893 (F), Iuridae Thorell, 1876 (G), Euscorpiidae Laurie, 1896 (H, I), and Scorpiopidae Kraepelin, 1905 (J–L), imaged with scanning electron microscopy (A–G, J–L) or light microscopy (H, I). A. Tityus elii Armas and Marcano Fondeur, 1992: absent. B. Isometrus maculatus (DeGeer, 1778): folded. C. Parabuthus granulatus (Ehrenberg, 1831): fusiform. D. Pseudolychas ochraceus (Hirst, 1911): folded. E. Ananteris arcadioi Botero-Trujillo, 2008: block. F. Chaerilus julietteae Lourenço, 2011: absent. G. Protoiurus asiaticus (Birula, 1903): straight. H. Tetratrichobothrius flavicaudis (De Geer, 1778): double bent. I. Megacormus sp., Veracruz, Mexico: spherical. J. Troglocormus ciego Francke, 1981: spherical. K. Scorpiops zubairi Kovařík, 2020: bent. L. Euscorpiops longimanus (Pocock, 1893): spiral. Scale bars: 25 µm.
A Sibling Oocyte Study- Comparison of ZyMotTM Microfluidics Device to Density Gradient for Sperm Selection During ICSI
ClinicalTrials.gov study NCT04818593. IPD Sharing: YES. Countries: 1. Publications: 0.
Laterality Success Determination of Microscopic Testicular Sperm Extraction in Non Obstructive Azoopsermia Patients
ClinicalTrials.gov study NCT07259967. IPD Sharing: Not stated. Countries: 0. Publications: 4.
Is the Lack of Prior Exposure to Sperm Antigens Associated With Worse Neonatal and Maternal Outcomes?
ClinicalTrials.gov study NCT04852237. IPD Sharing: Not stated. Countries: 0. Publications: 10.
The Effect of In-vitro Myoinositol Supplementation of Human Sperm on the Outcome of Cryopreservation
ClinicalTrials.gov study NCT03153436. IPD Sharing: UNDECIDED. Countries: 0. Publications: 6.
Effect of Herbal Supplement on Improving Sperm Virility
ClinicalTrials.gov study NCT07109622. IPD Sharing: NO. Countries: 0. Publications: 16.
Human Sperm Binding to Transgenic Mouse Eggs
ClinicalTrials.gov study NCT00340587. IPD Sharing: Not stated. Countries: 1. Publications: 3.
Impact of Escitalopram on Sperm DNA Fragmentation
ClinicalTrials.gov study NCT03527043. IPD Sharing: NO. Countries: 1. Publications: 0.
A Study to Examine the Effects of Minocycline Extended-Release Tablets on Sperm Production in Human Males.
ClinicalTrials.gov study NCT00765336. IPD Sharing: Not stated. Countries: 1. Publications: 0.
Post-operative Pain Control of Testicular Sperm Extraction Using Liposomal Bupivacaine
ClinicalTrials.gov study NCT03802864. IPD Sharing: NO. Countries: 1. Publications: 0.
Effect of Oocyte Denudation Time and Intracytoplasmic Sperm Injection Time on Embryo Quality
ClinicalTrials.gov study NCT05448859. IPD Sharing: UNDECIDED. Countries: 0. Publications: 1.
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