| cranial asymmetry in a dall sheep ram (ovis dalli dalli). | the horns of a 13-yr-old dall sheep ram (ovis dalli dalli) from the sheep mountain herd in kluane national park (yukon, canada) had unique characteristics. the right horn was 1,127 mm long, while the left horn was only 861 mm long and compressed and distorted at its base. the reduced growth of the left horn was due to chronic epidermitis and osteomyelitis of the cornual process, which began when the ram was 5 yr of age. | 1992 | 1602592 |
| an epizootic of mycoplasma ovipneumoniae infection in captive dall's sheep (ovis dalli dalli). | in late spring of 1986, 10 of 23 dall's sheep (ovis dalli dalli) at the metropolitan toronto zoo were moved to a new exhibit, where all developed severe respiratory signs refractory to anthelmintic and antibiotic therapy. in july, two animals died with chronic active bronch-pneumonia, and a third was euthanized because of pneumonia several months later. bacteria were not isolated from the lungs of the first, steptococci and pasteurella hemolytica were isolated from the other two, respectively; m ... | 1988 | 3193557 |
| a set of test life tables for theoretical gerontology. | prediction of life tables, which provide the most empirical information available about the statistical properties of aging, provides a rigorous test for any theory of aging as manifested at the organismic level of biological organization. for this purpose, a set of test tables for the wild boar (sus scrofa), domestic sheep (ovis aries), dall sheep (ovis dalli dalli), african buffalo (syncerus cafer), and hippopotamus (hippopotamus amphibius) is reconstructed from primary data taken from the lit ... | 1988 | 3346518 |
| chromosomes of the dall sheep, ovis dalli dalli (nelson). | | 1971 | 5581380 |
| further studies on horn aberrations in dall's sheep (ovis dalli dalli) from yukon territory, canada. | the prevalence of horn aberrations in dall's sheep from the kluane lake area of yukon territory observed during july 1982 represented 1% of the total population and 7% of rams 6 yr or older. ewes were not considered in these percentages because they were too difficult to inspect by aerial survey. when these data were combined with other data collected from 1977 through 1981, the prevalence equalled 2.4% of the total population and slightly exceeded 16% in mature rams (greater than or equal to 6 ... | 1984 | 6737607 |
| upper canines in dall's sheep (ovis dalli dalli). | | 1984 | 6737613 |
| hematologic, serum chemistry and serologic values of dall's sheep (ovis dalli dalli) in alaska. | in june 1979, 73 dall's sheep were captured near tok, alaska to determine selected hematologic and serum metabolite parameters and to determine the presence of antibodies to selected pathogens. hematology and serum metabolite values were compared with values for domestic sheep and bighorn sheep (ovis canadensis). antibodies were detected against brucella sp. (4%), campylobacter feti (30%), contagious ecthyma virus (23%) and bovine parainfluenza type 3 virus (1%). antibodies were not detected aga ... | 1983 | 6887435 |
| contagious ecthyma in an adult dall sheep (ovis dalli dalli) in alaska. | | 1982 | 7097867 |
| aberrations of the tooth arcade and mandible in dall's sheep from southwestern yukon. | nine dall's sheep (ovis dalli dalli) collected in the ruby mountains of southwestern yukon were examined for aberrations of the tooth arcade and mandible. missing and displaced teeth were common in older sheep (greater than or equal to 6 yr). necrosis of the mandible was observed in five of eight rams and in one ewe. corynebacterium pyogenes was cultured from exudates from two rams with enlarged fistulated mandibles. the sequence of events leading to lesions of the tooth arcade and to "lumpy jaw ... | 1982 | 7131654 |
| new host and geographic records for two protostrongylids in dall's sheep. | biodiversity survey and inventory have resulted in new information on the distribution of protostrongylidae in dall's sheep (ovis dalli dalli) from the northwest territories (nt, canada) and from alaska (ak, usa). in 1998, parelaphostrongylus odocoilei adults were found for the first time in the skeletal muscles of dall's sheep in the mackenzie mountains (nt). adult p. odocoilei were associated with petechial and ecchymotic hemorrhages and localized myositis; eggs and larvae in the lungs were as ... | 2001 | 11763740 |
| muskox lungworm (umingmakstrongylus pallikuukensis) does not establish in experimentally exposed thinhorn sheep (ovis dalli). | muskoxen (ovibos moschlatus moschatus) on the northwestern mainland of nunavut and northwest territories, canada, are infected with the protostrongylid lungworm, umingmaksrongylus pallikuuhkensis. the geographic range of this muskox population is expanding to the south and west, and it is anticipated that these animals will eventually become sympatric with dall's sheep (ovis dalli dalli) in the mackenzie and richardson mountains. to address the concern of wildlife managers that u. pallikulkensis ... | 2004 | 15362818 |
| geographic distribution of the muscle-dwelling nematode parelaphostrongylus odocoilei in north america, using molecular identification of first-stage larvae. | molecular identification of dorsal-spined larvae (dsl) from fecal samples indicates that the protostrongylid parasite parelaphostrongylus odocoilei occupies a broader geographic range in western north america than has been previously reported. we analyzed 2,124 fecal samples at 29 locations from thinhorn sheep (ovis dalli dalli and o. d. stonei), bighorn sheep (ovis canadensis canadensis and o. c. californiana), mountain goats (oreamnos americanus), woodland caribou (rangifer tarandus caribou), ... | 2005 | 16108550 |
| climate change and the epidemiology of protostrongylid nematodes in northern ecosystems: parelaphostrongylus odocoilei and protostrongylus stilesi in dall's sheep ( ovis d. dalli ). | we describe the epidemiology of the protostrongylid parasites parelaphostrongylus odocoilei and protostrongylus stilesi in dall's sheep (ovis dalli dalli) from the mackenzie mountains, northwest territories, canada (65 degrees n; 128 degrees w). peak numbers of 1st-stage larvae of both parasites were shed by dall's sheep on their winter range from march until may. in larval development experiments in the mackenzie mountains, peak numbers of infective 3rd-stage larvae of p. odocoilei were availab ... | 2006 | 16332289 |
| protostrongylid parasites and pneumonia in captive and wild thinhorn sheep (ovis dalli). | we describe health significance of protostrongylid parasites (parelaphostrongylus odocoilei and protostrongylus stilesi) and other respiratory pathogens in more than 50 naturally infected dall's sheep (ovis dalli dalli) from the mackenzie mountains, northwest territories (1998-2002) as well as in three stone's sheep (o. d. stonei) experimentally infected with p. odocoilei (2000-2002). histological lesions in the brain and distribution of p. odocoilei in the muscles of experimentally and naturall ... | 2007 | 17495303 |
| immunocontraception of captive exotic species: v. prolonged antibody titers in dall sheep (ovis dalli dalli) and domestic goats (capra hircus) immunized with porcine zona pellucida. | native porcine zona pellucida (pzp) immunocontraception has been used to inhibit fertility in more than 80 species of ungulates, although the duration of contraception efficacy varies among species in both perissodactyla and artiodactyla. this study examined anti-pzp antibody titers in dall sheep and domestic goats at the milwaukee county zoo, and also himalayan tahr and armenian mouflon sheep at the san diego zoo safari park, and, for comparison, altai wapiti, lowland wisent, javan banteng, and ... | 2013 | 24437081 |
| snp discovery in candidate adaptive genes using exon capture in a free-ranging alpine ungulate. | identification of genes underlying genomic signatures of natural selection is key to understanding adaptation to local conditions. we used targeted resequencing to identify snp markers in 5321 candidate adaptive genes associated with known immunological, metabolic and growth functions in ovids and other ungulates. we selectively targeted 8161 exons in protein-coding and nearby 5' and 3' untranslated regions of chosen candidate genes. targeted sequences were taken from bighorn sheep (ovis canaden ... | 2016 | 27327375 |
| failure to maintain interspecific pregnancy after transfer of dall's sheep embryos to domestic ewes. | over a 3-year period, 32 dall's sheep (ovis dalli dalli) embryos were transferred into 24 domestic sheep (o. aries) recipients and 4 were transferred into 2 dall's sheep recipients. in the first year, none of the 10 o. aries recipients was diagnosed pregnant. in the following 2 years, 9 (37%) of the domestic sheep recipients were pregnant on day 18, 8 (33%) on day 40, 6 (25%) on day 90 and 4 (16%) on day 120; 1 aborted at day 125 and another at day 145. pregnancies were established only in ewes ... | 1990 | 2250237 |
| identification of landscape features influencing gene flow: how useful are habitat selection models? | understanding how dispersal patterns are influenced by landscape heterogeneity is critical for modeling species connectivity. resource selection function (rsf) models are increasingly used in landscape genetics approaches. however, because the ecological factors that drive habitat selection may be different from those influencing dispersal and gene flow, it is important to consider explicit assumptions and spatial scales of measurement. we calculated pairwise genetic distance among 301 dall's sh ... | 2016 | 27330556 |
| susceptibility of dall sheep (ovis dalli dalli) to pneumonia caused by pasteurella haemolytica. | we evaluated susceptibility of dall sheep (ovis dalli dalli) to bacterial pneumonia induced by two strains of pasteurella haemolytica of domestic sheep origin by evaluating the sensitivity of blood neutrophils of eight dall sheep to lysis by cytotoxins of p. haemolytica, and by intratracheal inoculation of three dall sheep, two bighorn sheep (ovis canadensis), and two domestic sheep with 3.7 x 10(6) or 2.5 x 10(7) colony forming units of p. haemolytica. neutrophils from the dall sheep were more ... | 1996 | 9359056 |