| immobilization of coastal grizzly bears with etorphine hydrochloride. | seventeen coastal grizzly bears (ursus arctos horribilis) from southwestern british columbia were captured and immobilized a total of 27 times with etorphine hydrochloride (m99). effective dosages administered ranged from 0.011 to 0.132 mg/kg. drug dosages (on a body weight basis) were not significantly related to induction times (r=-.040); however, it appeared that induction could be reduced with an increased dosage. at higher dosage levels respiratory rate was reduced to 2/minute. | 1980 | 7411738 |
| 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 |
| persistent organic pollutants in british columbia grizzly bears: consequence of divergent diets. | nitrogen and carbon stable isotope signatures in growing hair reveal that while some british columbia grizzly bears (ursus arctos horribilis) rely entirely on terrestrial foods, others switch in late summer to returning pacific salmon (oncorynchus spp.). implications for persistent organic pollutant (pop) concentrations and patterns measured in the two feeding groups of grizzly bears were profound. while the bears consuming a higher proportion of terrestrial vegetation ("interior" grizzlies) exh ... | 2005 | 16201616 |
| sarcocystis caninum and sarcocystis svanai n. spp. (apicomplexa: sarcocystidae) associated with severe myositis and hepatitis in the domestic dog (canis familiaris). | there are several reports of sarcocystis sarcocysts in muscles of dogs, but these species have not been named. additionally, there are two reports of sarcocystis neurona in dogs. here, we propose two new names, sarcocystis caninum, and sarcocystis svanai for sarcocysts associated with clinical muscular sarcocystosis in four domestic dogs (canis familiaris), one each from montana and colorado in the usa, and two from british columbia, canada. only the sarcocyst stage was identified. most of the s ... | 2016 | 25256157 |
| hibernation-associated changes in persistent organic pollutant (pop) levels and patterns in british columbia grizzly bears (ursus arctos horribilis). | we hypothesized that depleted fat reserves in grizzly bears (ursus arctos horribilis) following annual hibernation would reveal increases in persistent organic pollutant (pop) concentrations compared to those present in the fall. we obtained fat and hair from british columbia grizzly bears in early spring 2004 to compare with those collected in fall 2003, with the two tissue types providing contaminant and dietary information, respectively. by correcting for the individual feeding habits of griz ... | 2007 | 17410772 |
| indigenous knowledge and science unite to reveal spatial and temporal dimensions of distributional shift in wildlife of conservation concern. | range shifts among wildlife can occur rapidly and impose cascading ecological, economic, and cultural consequences. however, occurrence data used to define distributional limits derived from scientific approaches are often outdated for wide ranging and elusive species, especially in remote environments. accordingly, our aim was to amalgamate indigenous and western scientific evidence of grizzly bear (ursus arctos horribilis) records and detail a potential range shift on the central coast of brit ... | 2014 | 25054635 |
| using grizzly bears to assess harvest-ecosystem tradeoffs in salmon fisheries. | implementation of ecosystem-based fisheries management (ebfm) requires a clear conceptual and quantitative framework for assessing how different harvest options can modify benefits to ecosystem and human beneficiaries. we address this social-ecological need for pacific salmon fisheries, which are economically valuable but intercept much of the annual pulse of nutrient subsidies that salmon provide to terrestrial and aquatic food webs. we used grizzly bears, vectors of salmon nutrients and animal ... | 2012 | 22505845 |
| plant consumption by grizzly bears reduces biomagnification of salmon-derived polychlorinated biphenyls, polybrominated diphenyl ethers, and organochlorine pesticides. | the present study characterizes the uptake and loss of persistent organic pollutants (pops) in grizzly bears (ursus arctos horribilis) by sampling and analyzing their terrestrial and marine foods and fecal material from a remote coastal watershed in british columbia, canada. the authors estimate that grizzly bears consume 341 to 1,120 µg of polychlorinated biphenyls (pcbs) and 3.9 to 33 µg of polybrominated diphenyl ethers daily in the fall when they have access to an abundant supply of returnin ... | 2013 | 23401324 |
| confronting uncertainty in wildlife management: performance of grizzly bear management. | scientific management of wildlife requires confronting the complexities of natural and social systems. uncertainty poses a central problem. whereas the importance of considering uncertainty has been widely discussed, studies of the effects of unaddressed uncertainty on real management systems have been rare. we examined the effects of outcome uncertainty and components of biological uncertainty on hunt management performance, illustrated with grizzly bears (ursus arctos horribilis) in british co ... | 2013 | 24223134 |
| predicting grizzly bear density in western north america. | conservation of grizzly bears (ursus arctos) is often controversial and the disagreement often is focused on the estimates of density used to calculate allowable kill. many recent estimates of grizzly bear density are now available but field-based estimates will never be available for more than a small portion of hunted populations. current methods of predicting density in areas of management interest are subjective and untested. objective methods have been proposed, but these statistical models ... | 2013 | 24367552 |
| ecology of conflict: marine food supply affects human-wildlife interactions on land. | human-wildlife conflicts impose considerable costs to people and wildlife worldwide. most research focuses on proximate causes, offering limited generalizable understanding of ultimate drivers. we tested three competing hypotheses (problem individuals, regional population saturation, limited food supply) that relate to underlying processes of human-grizzly bear (ursus arctos horribilis) conflict, using data from british columbia, canada, between 1960-2014. we found most support for the limited f ... | 2016 | 27185189 |