| helminths of the black bear in quebec. | twenty-one complete carcasses of black bears, ursus americanus , together with 34 intestinal tracts, 86 diaphragms and 168 faecal droppings collected between june, 1971 and november, 1972 in the province of quebec were examinel for helminths. species found and their prevalence were as follows: dirofilaria ursi in 57%; uncinaria yukonensis in 6%; baylisascaris transfuga in 21%; larvae of trichinella spiralis in less than 1%; diphyllobothrium ursi in 36%; and taenia krabbei and taenia hydatigena i ... | 1977 | 24228968 |
| morphological variability and molecular identification of uncinaria spp. (nematoda: ancylostomatidae) from grizzly and black bears: new species or phenotypic plasticity? | the hookworms uncinaria rauschi olsen, 1968 and uncinaria yukonensis ( wolfgang, 1956 ) were formally described from grizzly ( ursus arctos horribilis) and black bears ( ursus americanus ) of north america. we analyzed the intestinal tracts of 4 grizzly and 9 black bears from alberta and british columbia, canada and isolated uncinaria specimens with anatomical traits never previously documented. we applied morphological and molecular techniques to investigate the taxonomy and phylogeny of these ... | 2015 | 25548982 |