the elliptocyte: a study of the relationship between cell shape and membrane structure using the camelid erythrocyte as a model.1. the elliptocytic shape of the camelid erythrocyte is very stable and has a high resistance to modification by drugs and treatment which alter the shape of the discocytic erythrocytes of scimitar-horned oryx and man. 2. differences in the erythrocyte membrane proteins have been found which indicate that proteins play an important role in stabilisation of the camelid elliptocyte. 3. the organisation of the cytoskeletal network in camelid elliptocytes differs from that established for human disc ...19892605918
haemolytic effect of pasteurella haemolytica on blood from young mammals.on agar plates containing young lamb blood, pasteurella haemolytica produces a wide outer zone of partial haemolysis in addition to the narrow zone of complete clearing seen on adult sheep blood agar. to determine whether this phenomenon was limited to lamb blood, samples from young animals of 20 mammalian species were examined. two species--the barbary sheep (ammotragus lervia) and scimitar horned oryx (oryx tao)--possessed blood that gave this effect provided that the samples were taken from y ...19883194597
perinatal mortality and season of birth in captive wild ungulates.the magnitude of perinatal mortality in 50 species of captive wild ungulates born at the zoological society of london's collections at regent's park and whipsnade between 1975 and 1985 is reviewed. thirty-five per cent of 2471 ungulates born during this 11 year period died before six months old and most deaths occurred in the first week after birth. similar findings have been reported at other zoos and in the wild. the seasonal distribution of births is described in 43 species. significantly hig ...19873590601
cryptosporidiosis in young artiodactyls.cryptosporidium was found in the intestinal tract of 10 blackbuck, 2 scimitar-horned oryx, 2 fringe-eared oryx, 2 addax, and 1 sable antelope that had diarrhea. cryptosporidia were most numerous in the small intestine, but also were found in the cecum, spiral colon, and colon. the small intestine had minimal inflammation in association with the cryptosporidia. salmonella typhimurium was isolated from 10 of the 51 animals evaluated, with extensive inflammation of the cecum, spiral colon, and colo ...19854077628
basic haematological values in antelopes--ii. the hippotraginae and the tragelaphinae.basic haematological values in 49 animals of five species of the subfamily hippotraginae, namely the roan antelope hippotragus equinus, sable antelope hippotragus niger, adax antelope addax nasomaculatus, gemsbok oryx oryx gazella gazella and scimitar horned oryx oryx damah and in 51 individuals of five species in the subfamily tragelaphinae, including the bushbuck tragelaphus scriptus, nyala tragelaphus angasi, greater kudu tragelaphus strepsiceros, cape eland tautotragus oryx and bongo bocercu ...19846149054
epidemiological observations on spongiform encephalopathies in captive wild animals in the british isles.since 1986, scrapie-like spongiform encephalopathy has been diagnosed in 19 captive wild animals of eight species at or from eight zoological collections in the british isles. the affected animals have comprised members of the family bovidae: one nyala (tragelaphus angasi), four eland (taurotragus oryx), and six greater kudu (tragelaphus strepsiceros), one gemsbok (oryx gazella), one arabian oryx (oryx leucoryx), and one scimitar-horned oryx (oryx dammah), and members of the family felidae: four ...19947817514
the c-, g-, and r-banded karyotype of the scimitar-horned oryx (oryx dammah).karyotypes of five males and one female scimitar-horned oryx (oryx dammah) were prepared using lymphocyte and skin cells. cbg-, gtg-, and rbg-banded chromosomes were analysed and the banding patterns were compared with those of cattle, revealing a high level of homoeology except for chromosomes 9, 14, 21, y, and x. standard karyotypes are proposed for the scimitar-horned oryx karyotype, which contains 58 chromosomes with one pair of large submetacentric autosomes and 27 acrocentric autosomal pai ...19948206781
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 ...19938408784
heterologous in vitro fertilization and sperm capacitation in an endangered african antelope, the scimitar-horned oryx (oryx dammah).scimitar-horned oryx sperm function was studied using protocols developed for domestic cattle. objectives were to assess sperm 1) viability and motility in vitro over time, 2) capacitation in heparin- or calcium-supplemented medium, and 3) function in an in vitro fertilization system using heterologous (domestic cow) oocytes. seminal aliquots were washed, and sperm were resuspended in 1) talp with 5% fetal calf serum (talp), 2) talp + 10 microm heparin, 3) talp + 20 microm heparin, and 4) talp + ...19989475404
long-term viral serology of semi-free-living and captive ungulates.between 1973 and 1994, blood samples were collected at whipsnade wild animal park (uk) from three ungulate species kept in enclosures, including 28 european bison (bison bonasus), 37 scimitar-horned oryx (oryx dammah), and 49 père david's deer (elaphurus davidianus), and also from 144 semi-free-living chinese water deer (hydropotes inermis). these samples were tested for the presence of antibodies against three bovine viral diarrhea virus (bvdv)-like strains, three alpha-herpesvirus strains, enz ...19989732031
scimitar-horned oryx (oryx dammah) spermatozoa are functionally competent in a heterologous bovine in vitro fertilization system after cryopreservation on dry ice, in a dry shipper, or over liquid nitrogen vapor.a heterologous bovine in vitro fertilization (ivf) system was used to study the functional competence of scimitar-horned oryx spermatozoa after cryopreservation. four sperm-freezing methods were compared after dilution of ejaculates from six oryx with an equine semen extender: 1) dry ice, 2) dry shipper one-step, 3) dry shipper two-step, and 4) liquid nitrogen vapor. post-thaw sperm motility, longevity, and acrosomal status were assessed and zona pellucida penetration, fertilization, and embryo ...19999916019
centric fusion differences among oryx dammah, o. gazella, and o. leucoryx (artiodactyla, bovidae)g- and c-banded karyotypes of the genus oryx were compared using the standard karyotype of bos taurus. chromosomal complements were 2n = 56 in o. gazella gazella, 2n = 58 in o. g. beisa and o. g. callotis, 2n = 56-58 in o. dammah, and 2n = 57-58 in o. leucoryx. the number of autosomal arms in all karyotypes was 58. nearly all variation in diploid number was the result of three independent centric fusions, but one 2n = 57 specimen of o. g. gazella deviated from the normal complement of 2n = 56 du ...199910516440
vegetative endocarditis in a scimitar-horned oryx (oryx dammah).streptococcus uberis was cultured from vegetative endocarditis lesions in a scimitar-horned oryx (oryx dammah) from the parc de la haute touche, france. this is the first reported single isolation of s. uberis from an oryx with vegetative endocarditis leading to fatal congestive heart failure.199910749451
a generalized fecal glucocorticoid assay for use in a diverse array of nondomestic mammalian and avian species.noninvasive fecal glucocorticoid analysis has tremendous potential as a means of assessing stress associated with environmental disturbance in wildlife. however, interspecific variation in excreted glucocorticoid metabolites requires careful selection of the antibody used in their quantification. we compared four antibodies for detecting the major fecal cortisol metabolites in yellow baboons following (3)h cortisol administration, acth challenge, and hplc separation of fecal glucocorticoid metab ...200011121291
functional capacity and fertilizing longevity of frozen-thawed scimitar-horned oryx (oryx dammah) spermatozoa in a heterologous in vitro fertilization system.this study was conducted to determine if cryopreservation and thawing reduces the quality of scimitar-horned oryx spermatozoa and thus might be responsible for sub-optimal artificial insemination (al) efficiency. functional capacity of frozen thawed oryx spermatozoa was compared in a heterologous bovine in vitro fertilization (ivf) system after being prepared by four methods. fertilizing longevity was also assessed after thawing and pre-incubating spermatozoa for 12 or 24 h before ivf. sperm cha ...200011545181
species-specific sperm-egg interaction affects the utility of a heterologous bovine in vitro fertilization system for evaluating antelope sperm.the purpose of this study was to evaluate cryopreserved fringe-eared (fe) oryx (oryx gazella callotis) sperm function using a heterologous in vitro fertilization (ivf) system previously developed to study scimitar-horned (sh) oryx (oryx dammah) spermatozoa. semen was collected by electroejaculation from fe oryx (n = 2) and sh oryx (n = 2), evaluated immediately postcollection, and cryopreserved. thawed spermatozoa were evaluated for motility, forward progression, and acrosomal status immediately ...200111566750
gamma herpesvirus carrier status of captive artiodactyls.between 1998 and 2000, 103 individuals of 19 species of the order artiodactyla at whipsnade wild animal park were tested for evidence of infection with gamma herpesviruses in order to distinguish between species which are susceptible to malignant catarrhal fever (mcf), caused by alcelaphine herpesvirus-1 (alhv-1) of wildebeest (connochaetes sp.) or ovine herpesvirus-2 (ovhv-2) of domestic sheep, and species which carry related viruses sub-clinically. gamma herpesvirus dna was detected in the kno ...200212208112
intraocular pressure and tear production in five herbivorous wildlife species.the intraocular pressure and rate of tear production were measured in 18 addax antelopes (addax nasomaculatus), four impalas (aepyceros melampus), 11 wide-lipped rhinoceroses (ceratotherium simum), 10 white-tailed wildebeests (connochaetes gnou) and seven scimitar-horned oryxes (oryx dammah). the animals were anaesthetised with an intramuscular injection of etorphine hydrochloride and acepromazine maleate, and the schirmer tear test i was used to evaluate tear production, and applanation tonomet ...200212233828
occurrence of listeria spp. in captive antelope herds and their environment.two juvenile scimitar-horned oryx (oryx dammah) at the wild animal park planckendael died from acute septicemia caused by listeria monocytogenes serovar 4b. subsequently, listeria spp. were isolated from the feces, food, and environment of seven antelope species and examined using a two-stage enrichment procedure in fraser broth, followed by isolation on palcam agar. a total of 40/170 samples (23.5%) was positive for listeria spp. no organisms were cultured in 83/170 samples (48.8%), and 47 samp ...200112785709
a 12-month survey of the gastro-intestinal helminths of antelopes, gazelles and giraffids kept at two zoos in belgium.faecal egg count patterns and clinical signs associated with gastro-intestinal (gi) nematodes of 107 zoo ruminants were monitored at fortnightly intervals for 1 year. the ruminants in this study were kept under different husbandry conditions at two sites of the royal zoological society of antwerp, the antwerp zoo and the animal park planckendael. artiodactylids involved were arabian oryx (oryx leucoryx), scimitar-horned oryx (oryx dammah), bongos (tragelaphus euryceros isaaci), sitatungas (trage ...200415710531
field evaluation of the efficacy of fenbendazole in captive wild ruminants.the efficacy of in-feed fenbendazole at a dose rate of 7.5 mg/kg bodyweight for three consecutive days was assessed in five arabian oryx (oryx leucoryx), six scimitar-horned oryx (oryx dammah), 14 slender-horned gazelles (gazella leptoceros), eight soay sheep (ovis aries aries soay), 13 alpine ibex (capra ibex ibex), six red deer (cervus elaphus hippelaphus) and 11 nelson's elk (cervus elaphus nelsoni) kept in five herds in a zoo. the efficacy was assessed by means of repeated faecal egg count r ...200516272545
evaluation of three strategic parasite control programs in captive wild ruminants.parasite control in wild ruminants is based mainly on anthelmintics. the objective of the present study was to evaluate three parasite control programs in seven herds of captive wild ruminants in 3 consecutive years. in the first year, a biannual spring-summer treatment regime with fenbendazole at 7.5 mg/kg body weight p.o. for 3 days was applied. the next year, an early-season treatment program with three administrations of fenbendazole at the same dosage at 3-wk intervals was used. in the thir ...200617312807
clostridial myocarditis in a scimitar-horned oryx. 200919767644
fecal parasite identification by microscopy and pcr in scimitar-horned oryx, oryx dammah, managed at two sites.the scimitar-horned oryx, oryx dammah, an endangered species extinct in the wild, is managed in various captive management programs and is the focus of reintroduction efforts. management variability can contribute to substantial parasite load differences, which can affect deworming programs and potentially transfer parasites to different regions with translocations. parasite studies in o. dammah are lacking. in this study, we determined fecal egg/oocyst counts of o. dammah in two captive herds, ...201627942456
bayesian, maximum parsimony and upgma models for inferring the phylogenies of antelopes using mitochondrial markers.this investigation was aimed to compare the inference of antelope phylogenies resulting from the 16s rrna, cytochrome-b (cyt-b) and d-loop segments of mitochondrial dna using three different computational models including bayesian (ba), maximum parsimony (mp) and unweighted pair group method with arithmetic mean (upgma). the respective nucleotide sequences of three oryx species (oryx leucoryx, oryx dammah and oryx gazella) and an out-group (addax nasomaculatus) were aligned and subjected to ba, ...200819204824
comparisons among selected neonatal biomedical parameters of four species of semi-free ranging hippotragini: addax (addax nasomaculatus), scimitar-horned oryx (oryx dammah), arabian oryx (oryx leucoryx), and sable antelope (hippotragus niger).basic biomedical data from 164 neonates of four species of the tribe hippotragini, addax (addax nasomaculatus), scimitar-horned oryx (oryx dammah), arabian oryx (oryx leucoryx), and sable antelope (hippotragus niger), were compared at one zoological institution over a 9-year period. measured biomedical parameters included body weight, temperature, pulse and respiratory rates, packed cell volume (pcv), total plasma protein, glucose, igg assessment via zinc sulfate turbidity, and white blood cell ...200111319780
effects of copper oxide wire particle bolus therapy on trichostrongyle fecal egg counts in exotic artiodactylids.four species of artiodactylids (scimitar-horned oryx [oryx dama]), roan antelope [hippotragus equinus], blackbuck [antilope cervicapra]), and blesbok [damaliscus pygargus phillipsi]) totaling 13 animals were treated with a one-time 12.5-g dose of copper oxide wire particles (cowps) in a bolus form. pretreatment, individual trichostrongyle fecal egg counts (fecs) were performed using the mcmaster technique. individual posttreatment fecs were performed every 7 days for 35 days beginning 7 days aft ...200819110710
pulmonary arterial disease associated with right-sided cardiac hypertrophy and congestive heart failure in zoo mammals housed at 2,100 m above sea level.subacute and chronic mountain sickness of humans and the related brisket disease of cattle are characterized by right-sided congestive heart failure in individuals living at high altitudes as a result of sustained hypoxic pulmonary hypertension. adaptations to high altitude and disease resistance vary among species, breeds, and individuals. the authors conducted a retrospective survey of right-sided cardiac hypertrophy associated with pulmonary arterial hypertrophy or arteriosclerosis in zoo mam ...201526667539
resource partitioning between ungulate populations in arid environments.herbivores are major drivers of ecosystem structure, diversity, and function. resilient ecosystems therefore require viable herbivore populations in a sustainable balance with environmental resource availability. this balance is becoming harder to achieve, with increasingly threatened species reliant on small protected areas in increasingly harsh and unpredictable environments. arid environments in north africa exemplify this situation, featuring a biologically distinct species assemblage expose ...201627656279
a new coccidian parasite (apicomplexa: eimeriidae) from the scimitar-horned oryx, oryx dammah.oocysts of eimeria oryxae sp. n. are described from the faeces of the scimitar-horned oryx, oryx dammah (cretzschmar, 1826), from zoo garden, riyadh city, saudi arabia. sporulated oocysts were ellipsoid in shape measuring 20.9 x 17.1 (16.7-24.2 x 15.5-20.2) microm, with smooth brownish-yellow double layered wall. micropyle and ellipsoidal polar granules are present, but micropylar cap and oocyst residuum are absent. sporocysts are ovoid, reaching 10.0 x 5.7 (9.2-11.0 x 5.2-6.5) microm with stied ...200212049259
molecular identification of parasitic nematodes (nematoda: strongylida) in feces of wild ruminants from tunisia and other north african countries, there is a lack of knowledge about parasite biodiversity within threatened wild ruminants and there are not any studies on their gastrointestinal nematodes. thus the aim of this study was to identify gastrointestinal fauna in the faecal samples of tunisian wild ruminants. a total of 262 faecal samples were collected from domestic sheep and goat, and wild ruminants (addax, barbary sheep, barbary red deer, dorcas gazelle, slender-horned gazelle and sci ...201729113593
exposure to neospora spp. and besnoitia spp. in wildlife from israel.neosporosis and besnoitiosis, caused by cyst-forming protozoa neospora caninum and besnoitia besnoiti, respectively, are parasitic infestations of livestock in israel. these parasites cause significant economic losses in cattle due to reproductive and productive disorders. both parasites have been detected in several wild ruminant species throughout other regions of the world, while the existence of a sylvatic life cycle in israel remains uncertain. thus, a wide panel of 871 sera from two wild c ...201830175044
temperature dependency of whole blood viscosity and red cell properties in desert ungulates: studies on scimitar-horned oryx and dromedary camel.the dromedary camel and the oryx antelope are exposed to excessive heat and solar radiation in theirdesert habitat. desertification of areas with by now little rainfall may occur eventually. well-adapted large animal speciesshow us what is needed to survive in scorching regions.201829710697
phylogenetic analysis of oryx species using partial sequences of mitochondrial rrna genes.we conducted a comparative evaluation of 12s rrna and 16s rrna genes of the mitochondrial genome for molecular differentiation among three oryx species (oryx leucoryx, oryx dammah and oryx gazella) with respect to two closely related outgroups, addax and roan. our findings showed the failure of 12s rrna gene to differentiate between the genus oryx and addax, whereas a 342-bp partial sequence of 16s rrna accurately grouped all five taxa studied, suggesting the utility of 16s rrna segment for mole ...200819048493
application of 16s rrna, cytochrome b and control region sequences for understanding the phylogenetic relationships in oryx species.the present study reports the application of mitochondrial markers for the molecular phylogeny of oryx species, including the arabian oryx (ao), scimitar-horned oryx (sho) and plains oryx (po), using the addax as an outgroup. sequences of three molecular markers, 16s rrna, cytochrome b and a control region, for the above four taxa were aligned and the topologies of respective phylogenetic trees were compared. all these markers clearly differentiated the genus addax from oryx. however, for specie ...200819224456
paratuberculosis in captive scimitar-horned oryxes (oryx dammah).paratuberculosis, a chronic disease caused by mycobacterium avium subsp. paratuberculosis (map), in ten scimitar-horned oryxes (shos) hosted in an italian zoological park and originating from a slovakian flock, was documented by pathology, molecular, cultural, and serological testing. the infection origin in this threatened species was also investigated by genomic analyses. following the death of six of the 10 shos, serial investigations of dead and alive animals were performed. necropsy, carrie ...202033113949
integrating genomics into conservation management.captive populations play a vital role in conservation, supporting both in situ and ex situ conservation projects. a healthy, self-sustaining captive population serves as valuable insurance against extinctions and a source of individuals for reintroduction into the wild. genetic and genomic data can advance conservation and management across a range of scenarios. although expanding, genomic data do not exist for most captive populations and there remain few examples of how these data can be integ ...202032416033
chromosomal-level genome assembly of the scimitar-horned oryx: insights into diversity and demography of a species extinct in the wild.captive populations provide a valuable insurance against extinctions in the wild. however, they are also vulnerable to the negative impacts of inbreeding, selection and drift. genetic information is therefore considered a critical aspect of conservation management. recent developments in sequencing technologies have the potential to improve the outcomes of management programmes; however, the transfer of these approaches to applied conservation has been slow. the scimitar-horned oryx (oryx dammah ...202032365406
deslorelin subcutaneous implants in oryx dammah males for reproductive control.the aim of this study was to assess the effects of the deslorelin subcutaneous implant as a temporary contraceptive method in the oryx dammah male. for this purpose, deslorelin at different doses, i.e. 14.1 mg and 9.4 mg, was subcutaneously implanted in three males (phase 1) and one male (phase 2) adult oryx dammah, respectively. quantitative behavior evaluation and androgen concentrations in feces and plasma were assessed before and after implant application. fecal androgen concentrations obser ...202032247215
short-term effects of gps collars on the activity, behavior, and adrenal response of scimitar-horned oryx (oryx dammah).gps collars have revolutionized the field of animal ecology, providing detailed information on animal movement and the habitats necessary for species survival. gps collars also have the potential to cause adverse effects ranging from mild irritation to severe tissue damage, reduced fitness, and death. the impact of gps collars on the behavior, stress, or activity, however, have rarely been tested on study species prior to release. the objective of our study was to provide a comprehensive assessm ...202032045413
foot-and-mouth disease outbreaks in captive scimitar-horned oryx (oryx dammah).this paper describes three episodes of foot-and-mouth disease (fmd) that were detected during 2013-2015 in scimitar-horned oryx (oryx dammah) (sho), a large sahelo-saharan antelope extinct in the wild housed in a wild ungulate breeding facility located 50 km east of abu dhabi, united arab emirates. while no mortality attributable to fmd was noted in the population of nearly 4,000 sho during two of the three outbreaks, the morbidity varied according to the circulating strains and seroconversion r ...202032011088
survey of husbandry practices for bovidae in zoos: the importance of parasite management for reintroduction programmes.animals from zoological institutions may be used for reintroductions. these individuals are considered healthy, but they are not necessarily free of parasites, despite the minimum husbandry standards required of zoological institutions as described in the european association of zoos and aquaria guidelines. in this sense, parasitism has been identified as the cause of failure, or has added difficulties, in some reintroduction programmes. here the authors attempt to summarise the risk of parasiti ...201930819861
uterine metastatic rhabdomyosarcoma in a scimitar-horned oryx (oryx dammah).a 13-year-old female scimitar-horned oryx (oryx dammah) died after progressive anorexia, weight loss, and depression. the necropsy showed that the retroperitoneum was compressed by a large white-to-tan uterine mass and on several sections of the mass, the uterine wall was markedly thickened because of ill-defined transmural tumor tissue. metastatic nodules were detected in the omentum, mesentery, diaphragm, and lung. the genital tract and pulmonary and abdominal nodules exhibited highly pleomorp ...201830185725
fecal cortisol levels in scimitar-horned oryx, oryx dammah, reveals differences between captive environments.due to the intensive management of the scimitar-horned oryx, oryx dammah, involving both captivity and reintroductions, understanding the stress associated with environmental situations this endangered species might experience would be particularly helpful. fecal cortisol levels were measured across seasons, between captive management programs, and among varying reproductive states in animals held at fossil rim wildlife center (frwc) and kansas city zoo (kcz). a total of 72 samples were collecte ...201729297811
evaluating conservation breeding success for an extinct-in-the-wild antelope.with the number of threatened species increasing globally, conservation breeding is vitally important now more than ever. however, no previous peer-reviewed study has attempted to determine how the varying conditions across zoos have influenced breeding by an extinct-in-the-wild species. we therefore use questionnaires and studbook data to evaluate the influence of husbandry practices and enclosure design on scimitar-horned oryx (oryx dammah) breeding success, at the herd level. regression model ...201627935999
the complete mitochondrial genome of scimitar-horned oryx (oryx dammah).in this study, a blood sample was obtained from a scimitar-horned oryx in jinan paomaling world of wildlife and the complete nucleotide sequence of scimitar-horned oryx mitochondrial genome was determined. sequence analysis showed that the genome structure was in accordance with other bovid species that it contained 22 trna genes, 12s rrna gene, 16s rrna gene, 13 protein-coding genes and 1 control region.201222775428
uterine endometrial carcinoma associated with dystocia in a captive scimitar-horned oryx (oryx dammah). 200919465757
remnants of ancient genetic diversity preserved within captive groups of scimitar-horned oryx (oryx dammah).scimitar-horned oryx, now considered extinct in the wild, persists in large numbers in captivity. in this first molecular genetic study on this species, we explore the patterns of genetic diversity across european, north american, and a few other captive groups using microsatellite markers and mitochondrial control region sequencing. strong population structure was not evident from microsatellite data but we discovered deep divergence within the mitochondrial dna haplotypes from a network analys ...200717561904
on the horns of a dilemma: molecular approaches refine ex situ conservation in years into this new millennium, species and habitat loss continue at an accelerated rate. while there have been individual examples of conservation success, the trend towards catastrophic loss of biological diversity persists. if we are to be successful in saving even a handful of critically endangered species, it is clear that they will need to be intensively managed using a variety of in situ and ex situ approaches. the highest profile ex situ conservation strategy is captive breeding. a ...200717561901
comparing ovulation synchronization protocols for artificial insemination in the scimitar-horned oryx (oryx dammah).ovarian response and pregnancy success in scimitar-horned oryx (n=28) were compared, following treatment with two synchronization protocols and fixed-time artificial insemination (ai) with frozen-thawed semen. each oryx received two injections of 500 microg of prostaglandin-f(2alpha) analogue (pgf(2alpha)-only) 11 days apart, and half received pgf(2alpha) in combination with an intravaginal progesterone-releasing device (cidr11+pgf(2alpha)). semen was collected by electroejaculation from anaesth ...200010804277
ovarian activity in the scimitar-horned oryx (oryx dammah) determined by faecal steroid analysis.ultrasonography and radioimmunoassay (ria) of serum oestradiol-17beta, luteinizing hormone (lh) and progesterone, and faecal oestrogen and progestin was used to assess ovarian activity in the scimitar-horned oryx (oryx dammah). ovarian examination using ultrasonography revealed maximal follicle and corpus luteum (cl) diameters of 15 and 32 mm, respectively. steroid hormone metabolite distribution among individual faecal pellets within the same defaecation was relatively homogeneous with coeffici ...19989835376
pharmacokinetics of a single intravenous enrofloxacin dose in scimitar-horned oryx (oryx dammah).based on a 1.3 mg/kg mean dosage determined by metabolic energy scaling, enrofloxacin pharmacokinetics of a single i.v. dose of enrofloxacin in five adult scimitar-horned oryx (oryx dammah) were determined. drug concentration versus time curves were best fit by residual analysis to a one-compartment open model with a maximum (mean +/- sd) serum concentration after distribution of 1.887 +/- 0.632 micrograms/ml and an elimination half-life of 41.2 +/- 27.5 min. model-independent parameters were ar ...19979226614
physiological effects of etorphine, acepromazine and xylazine in the scimitar horned oryx (oryx dammah).scimitar horned oryx (oryx dammah), kept under confined and unconfined conditions were immobilised with etorphine in combination with acepromazine or xylazine or both, and with xylazine alone. both groups of animals were successfully sedated with etorphine and xylzine, with or without acepromazine, although hypothermia and mild hypoxaemia and a fall in packed cell volume were frequently noted. xylazine alone produced a dose dependent degree of sedation in semitame subadult animals kept in confin ...19892772409
disseminated intravascular coagulation associated with inhalation pneumonitis in a scimitar-horned oryx (oryx tao). 19853992862
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