| interspecies variation in milk composition among horses, zebras and asses (perissodactyla: equidae). | milk samples of four species of wild equids (onager, equus hemionus onager; mountain zebra, e. zebra hartmannae; plains zebra, e. burchelli; przewalski horse, e. caballus przewalskii) and two domesticated equids (ass, e. asinus; pony, e. caballus) were analysed. at mid to late lactation the milks of all species were very similar, containing on average 10-12% total solids, 1-2% fat, 1.6-1.8% true protein, 6-7% 'lactose', 0.3-0.5% ash, 0.08-0.12% calcium, 0.04-0.07% phosphorus and a calculated ene ... | 1988 | 3385068 |
| molecular cytogenetics of the equidae. ii. purification and cytological localization of a (g + c)-rich satellite dna from equus hemionus onager and cross-species hybridization to e. asinus chromosomes. | a (g + c)-rich satellite dna component (p = 1.716 g/ml) has been fractionated from the total dna of the iranian subspecies of the asiatic wild ass, equus hemionus onager, by successive dactinomycin-cscl and netropsin sulfate-cscl isopycnic gradients. complementary 3h-rna (crna) transcribed from the satellite dna hybridized predominantly to the centromeric and telomeric constitutive heterochromatic regions of onager chromosomes. these studies have suggested that satellite dna's with similar seque ... | 1983 | 6851669 |
| subclinical lumbar polyradiculopathy, polyneuritis and ganglionitis in aged wild and exotic mammalians. | subclinical lumbar polyradiculopathy was present in the intradural dorsal and ventral nerve rootlets of 19 aged individuals of the following wild and exotic mammalian species: woodrat, raccoon, mink, lynx, reindeer, red deer, musk ox, scimitar-horned oryx, arabian oryx, hybrid waterbuck, persian onager, przewalski's wild horse, malayan sun bear, asian elephant, east african river hippopotamus, vervet monkey and rhesus monkey. it was characterized by mild to severe multifocal ballooning of myelin ... | 1993 | 8408784 |
| new hosts for equine herpesvirus 9. | equine herpesvirus 9 was detected in a polar bear with progressive encephalitis; the source was traced to 2 members of a potential equid reservoir species, grevy's zebras. the virus was also found in an aborted persian onager. thus, the natural host range is extended to 6 species in 3 mammalian orders. | 2008 | 18826828 |
| pituitary pars intermedia dysfunction (equine cushing's disease) in an onager (equus hemionus onager). | pituitary pars intermedia dysfunction (ppid), also known as equine cushing's disease, is most often diagnosed in older horses and ponies. to the authors' knowledge, there have been no reports of its diagnosis in captive nondomestic equids. a 13-yr old onager (equus hemionus onager) at the zoological society of london (zsl) whipsnade zoo showed clinical signs suggestive of ppid, including hirsutism, fat redistribution, weight loss, laminitis, and chronic infections. a dexamethasone suppression te ... | 2009 | 20063825 |
| glucocorticoid response to changes in enclosure size and human proximity in the persian onager (equus hemionus onager). | this study investigated glucocorticoid (gc) responses to season and changes in enclosure size and human proximity in the persian onager (equus hemionus onager). enzyme immunoassays were validated to measure gc metabolites in urine and feces (fgcm). fecal samples were collected from 10 female onagers while in a large pasture, after transport to smaller yards (in greater proximity to people), and 2 months thereafter. urine samples were collected for 1 year while females were in smaller yards to ex ... | 2011 | 21682659 |
| retrospective serological investigation of bovine tuberculosis in two gemsbok (oryx gazelle gazelle) and an onager (equus hemionus onager). | in 1997 a 26-yr-old gemsbok (oryx gazelle gazelle) died of bovine tuberculosis in a zoo. three remaining gemsbok were administered the comparative tuberculin skin test repeatedly over a period of 5 mo. two animals showed inconclusive results on the second test. all three gemsbok were euthanatized. mycobacterium bovis was isolated from one of those with an inconclusive skin test result, whereas mycobacterium fortuitum was detected in the other gemsbok. eight years later, an onager (equus hemionus ... | 2013 | 24450065 |
| estrous cycle synchronization in the persian onager (equus hemionus onager). | the endangered persian onager (equus hemionus onager) has experienced significant population declines over the past century due to poaching, habitat destruction, and resource competition. remaining animals in zoos and the wild are regionally isolated. artificial insemination (ai) may be particularly useful as a means of aiding in global genetic management of these isolated populations. the first successful ai in onagers was performed in 2009 utilizing urinary hormone analyses and regular transre ... | 2016 | 26849100 |
| the effect of fluphenazine decanoate on glucocorticoid production, reproductive cyclicity, and the behavioral stress response in the persian onager (equus hemionus onager). | artificial insemination, performed to maximize genetic diversity in populations of zoo-housed animals, requires intensive management and has been associated with low success rates in fractious species. in these species, stressors, such as frequent handling, may impact fertility. long-acting neuroleptic pharmaceuticals (lans) can attenuate the stress response to handling, but may also disrupt ovulation in some species, compromising their use for artificial insemination. therefore, the goal of thi ... | 2015 | 26491959 |
| cryopreservation of onager (equus hemionus onager) epididymal spermatozoa. | genetic diversity is a primary component of adaptive evolution, and its loss or reduction can decrease the long-term survival probability of populations. utilization of cryopreserved semen may be considered a perfect tool to improve genetic diversity, reduce inbreeding, and avoid animal translocation for breeding. the present study aimed at finding a reliable epididymal sperm freezing protocol for the critically endangered onager (equus hemionus onager). six testicles from three animals were pro ... | 2015 | 26352955 |
| fundamental studies of the reproductive biology of the endangered persian onager (equus hemionus onager) result in first wild equid offspring from artificial insemination. | we studied the persian onager (equus hemionus onager), an endangered equid subspecies. the objective was to characterize endocrine patterns and ovarian follicular dynamics of females as well as seminal traits and sperm sensitivity to cryopreservation in males as a prerequisite to testing the feasibility of artificial insemination (ai). urinary progesterone and estrogen metabolite profiles were determined by enzyme immunoassay in 11 females. serial ultrasonography of ovarian activity was performe ... | 2013 | 23863403 |
| phylogenetic analysis and species allocation of individual equids using microsatellite data. | the taxonomic status of all equid species is not completely unravelled. this is of practical relevance for conservation initiatives of endangered, fragmented equid populations, such as the asiatic wild asses (in particular equus hemionus onager and e. hemionus kulan). in this study, a marker panel consisting of 31 microsatellite loci was used to assess species demarcation and phylogeny, as well as allocation of individuals (n = 120) to specific populations of origin (n = 11). phylogenetic analys ... | 2005 | 16130461 |
| comparison of various extenders for freeze-preservation of semen from selective captive wild ungulates. | semen collected by electroejaculation from selected captive wild ungulates was used to evaluate the cryoprotective ability of 4 semen diluents. three species of ungulates were used: blesbok (damaliscus dorcas phillipsi), dorcas gazelle (gazella dorcas), and onager (equus hemionus onager). fresh semen was immediately evaluated for the percentage of motility and the progressive motility, and an aliquot was fixed for evaluation of the acrosomal integrity of spermatozoa. the remaining volume of ejac ... | 1981 | 7327998 |