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36 results for “Equus caballus”
The oxytocin-prostaglandins pathways in the horse (Equus caballus) placenta during pregnancy, physiological parturition, and parturition with fetal membrane retention
<p>Despite their importance in mammalian reproduction, substances in the oxytocin-prostaglandins pathways have not been investigated in the horse placenta during most of pregnancy and parturition. Therefore, we quantified placental content of oxytocin (OXT), oxytocin receptor (OXTR), and prostaglandin E2 and F2 alpha during days 90–240 of pregnancy (PREG), physiological parturition (PHYS), and parturition with fetal membrane retention (FMR) in heavy draft horses (PREG = 13, PHYS = 11, FMR = 10). We also quantified <i>OXTR</i> and<i> </i>prostaglandin endoperoxide synthase-2 (<i>PTGS2</i>) mRNA expression and determined the immunolocalization of OXT, OXTR, and PTGS2. For relative quantification of OXT and OXTR, we used western blotting with densitometry. To quantify the prostaglandins, we used enzyme immunoassays. For relative quantification of <i>OXTR</i> and <i>PTGS2</i>, we used RT-qPCR. For immunolocalization of OXT, OXTR, and PTGS2, we used immunohistochemistry. We found that OXT was present in cells of the allantochorion and endometrium in all groups. <i>PTGS2</i> expression in the allantochorion was 14.7-fold lower in FMR than in PHYS (<i>p</i> = 0.007). These results suggest that OXT is synthesized in the horse placenta. As PTGS2 synthesis is induced by inflammation, they also suggest that FMR in heavy draft horses may be associated with dysregulation of inflammatory processes.</p>
The oxytocin-prostaglandins pathways in the horse (Equus caballus) placenta during pregnancy, physiological parturition, and parturition with fetal membrane retention
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FIGURE 1 in Intestinal ciliates (Alveolata, Ciliophora) in Brazilian domestic horses (Equus caballus L.) and a review on the ciliate communities associated with horses around the world
FIGURE 1. Intestinal ciliates recorded in Brazilian domestic horses (Equus caballus, L.), after staining by Lugol's Solution. a- d. Family Blepharocorythidae Hsiung; e-j. Family Buetschliidae Poche; k.l. Family Cyclosposthiidae. a. Blepharocoys angusta, b. Blepharocorys cardionucleata; c. Blepharocorys curvicula; d. Blepharocorys valvata; e. Bundleia elongata; f. Bundleia posticiliata, g. Bundleia vorax, h. Buissonela tapiri, i. Didesmis quadrata, j. Polymorphella ampula, k. Cycloposthium edentatum, l. Tripalmaria dogieli. ACZ. Adoral ciliary zone, CCZ. caudal ciliary zone, CV. Contractile vacuole, CoV: Concrection vacuole, FL: frontal lobe, Ma. macronucleus, Sk. skeletal plate, Ve. Vestibulum. Scale bars: 10 µm.
Data from: A free-ranging, feral mare (Equus caballus) affords similar maternal care to her genetic and adopted offspring
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Data from: Ejaculate characteristics depend on social environment in the horse (Equus caballus)
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Figure 9 in Environmental influences on movements and distribution of a wild horse (Equus caballus) population in western Nevada, USA: a 25-year study
Figure 9. Key summer range (KSR) use by horse population and human presence. Data are for use from May to September. Human presence is presented as per cent of its highest year. Human presence includes private sector activities, educational/commercial activities and research/management activities. Human presence was generally greatest during the horse breeding/foaling period (May–June).
Figure 7 in Environmental influences on movements and distribution of a wild horse (Equus caballus) population in western Nevada, USA: a 25-year study
Figure 7. Annual key summer range (KSR) use in relationship to KSR condition and annual Montgomery Pass Wild Horse Territory (MPWHT) precipitation. The latter two data sets are presented in relative fashion as per cent of highest year.
Figure 10 in Environmental influences on movements and distribution of a wild horse (Equus caballus) population in western Nevada, USA: a 25-year study
Figure 10. Relationship of reduced key summer range (KSR) use on whole-population foal survival. KSR is the primary area of lion use and predation. Foal survival is presented as the ratio of current-year yearlings to previous-year foals expressed as a percentage. Foal survival data are for the entire Montgomery Pass Wild Horse Territory (MPWHT) population.
Figure 1 in Environmental influences on movements and distribution of a wild horse (Equus caballus) population in western Nevada, USA: a 25-year study
Figure 1. Montgomery Pass Wild Horse Territory (MPWHT) Map. The MPWHT lies on the California–Nevada border. Agency jurisdictions are USFS (green) and BLM (white). The three major horse areas are KSR (key summer range, i.e. upper elevations), Adobe Valley and Basalt (both historical winter range, lower elevations). Dotted lines within and outside the territory boundary represent additional horse use associated with the three main use areas. Hatched pink areas are grazing allotments (AV = Adobe Valley, BL = Black Lake, BS = Basalt). Closed squares are permanent springs. Open circles are seasonal springs. The blue line is Adobe Creek running into AV. Numbers are elevations (m), and triangle is highest point in MPWHT (2556 m). The lower left and right perimeters of the Territory roughly coincide with two paved roads (Routes 120 and 6). Relief aspect of map is courtesy of Google Earth.
Data from: Female MHC type affects male testosterone levels and sperm number in the horse (Equus caballus)
Odours of vertebrates often contain information about the major histocompatibility complex (MHC), and are used in kin recognition, mate choice or female investment in pregnancy. It is, however, still unclear whether MHC-linked signals can also affect male reproductive strategies. We used horses (Equus caballus) to study this question under experimental conditions. Twelve stallions were individually exposed either to an unfamiliar MHC-similar mare and then to an unfamiliar MHC-dissimilar mare, or vice versa. Each exposure lasted over a period of four weeks. Peripheral blood testosterone levels were determined weekly. Three ejaculates each were collected in the week after exposure to both mares (i.e. in the ninth week) to determine mean sperm number and sperm velocity. We found high testosterone levels when stallions were kept close to MHC-dissimilar mares and significantly lower ones when kept close to MHC-similar mares. Mean sperm number per ejaculate (but not sperm velocity) was positively correlated to mean testosterone levels and also affected by the order of presentation of mares: sperm numbers were higher if MHC-dissimilar mares were presented last than if MHC-similar mares were presented last. We conclude that MHC-linked signals influence testosterone secretion and semen characteristics, two indicators of male reproductive strategies.
Data from: Functionally relevant responses to human facial expressions of emotion in the domestic horse (Equus caballus)
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Data from: Female MHC type affects male testosterone levels and sperm number in the horse (Equus caballus)
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Effect of a progressive weaning on behavioural and physiologic indicators in mares (Equus caballus)
GEO Series GSE97907. Equus caballus. 32 samples. Type: Expression profiling by array.
FIG. 1 in Un visage animal dans les reliefs ninivites d'Assurbanipal ( siècle av. J.-C.)? Le cas du cheval (Equus caballus Linnaeus, 1758) et du lion (Panthera leo Linnaeus, 1758)
FIG. 1. — Relevé du relief de Khorsabad (musée du Louvre, inv. AO 19872; Botta 1849-1850: pl. 43).
Effect of a progressive weaning on behavioural and physiologic indicators in foals and mares (Equus caballus)
GEO Series GSE97908. Equus caballus. 96 samples. Type: Expression profiling by array.
Effect of a progressive weaning on behavioural and physiologic indicators in foals (Equus caballus)
GEO Series GSE97906. Equus caballus. 64 samples. Type: Expression profiling by array.
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