Publications

serologic investigations of canine parvovirus and canine distemper in relation to wolf (canis lupus) pup mortalities.	twenty-one serum samples from 18 wolves (canis lupus) were collected from 1985 to 1990 from northwestern montana (usa) and southeastern british columbia, canada, and evaluated for antibodies to canine parvovirus (cpv), canine distemper (cd), infectious canine hepatitis, and lyme disease; we found prevalences of 13 (65%) of 19, five (29%) of 17, seven (36%) of 19, and 0 of 20 wolves for these diseases, respectively. pups died or disappeared in three of the eight packs studied. in these three pack ...	1994	8028116
echinococcus granulosus in gray wolves and ungulates in idaho and montana, usa.	we evaluated the small intestines of 123 gray wolves (canis lupus) that were collected from idaho, usa (n=63), and montana, usa (n=60), between 2006 and 2008 for the tapeworm echinococcus granulosus. the tapeworm was detected in 39 of 63 wolves (62%) in idaho, usa, and 38 of 60 wolves (63%) in montana, usa. the detection of thousands of tapeworms per wolf was a common finding. in idaho, usa, hydatid cysts, the intermediate form of e. granulosus, were detected in elk (cervus elaphus), mule deer ( ...	2009	19901399
density dependence and climate effects in rocky mountain elk: an application of regression with instrumental variables for population time series with sampling error.	1. sampling error in annual estimates of population size creates two widely recognized problems for the analysis of population growth. first, if sampling error is mistakenly treated as process error, one obtains inflated estimates of the variation in true population trajectories (staples, taper & dennis 2004). second, treating sampling error as process error is thought to overestimate the importance of density dependence in population growth (viljugrein et al. 2005; dennis et al. 2006). 2. in ec ...	2009	19549144
sarcoptic mange found in wolves in the rocky mountains in western united states.	we documented sarcoptic mange caused by mites (sarcoptes scabiei) in 22 gray wolves (canis lupus) in the northern rocky mountain states of montana (n=16) and wyoming (n=6), from 2002 through 2008. to our knowledge, this is the first report of sarcoptic mange in wolves in montana or wyoming in recent times. in addition to confirming sarcoptic mange, we recorded field observations of 40 wolves in montana and 30 wolves in wyoming displaying clinical signs of mange (i.e., alopecia, hyperkeratosis, a ...	2010	20966263
meta-analysis of relationships between human offtake, total mortality and population dynamics of gray wolves (canis lupus).	following the growth and geographic expansion of wolf (canis lupus) populations reintroduced to yellowstone national park and central idaho in 1995-1996, rocky mountain wolves were removed from the endangered species list in may 2009. idaho and montana immediately established hunting seasons with quotas equaling 20% of the regional wolf population. combining hunting with predator control, 37.1% of montana and idaho wolves were killed in the year of delisting. hunting and predator control are wel ...	2010	20927363
a novel assessment of population structure and gene flow in grey wolf populations of the northern rocky mountains of the united states.	the successful re-introduction of grey wolves to the western united states is an impressive accomplishment for conservation science. however, the degree to which subpopulations are genetically structured and connected, along with the preservation of genetic variation, is an important concern for the continued viability of the metapopulation. we analysed dna samples from 555 northern rocky mountain wolves from the three recovery areas (greater yellowstone area, montana, and idaho), including all ...	2010	20723068
cadmium, copper, iron, and zinc concentrations in kidneys of grey wolves, canis lupus, from alaska, idaho, montana (usa) and the northwest territories (canada).	cadmium, copper, iron, and zinc levels were measured in the kidneys of 115 grey wolves (canis lupus) from idaho, montana and alaska (united states), and from the northwest territories (canada). no significant differences in the levels of iron or copper were observed between locations, but wolf kidneys from more northern locations had significantly higher cadmium levels (alaska > northwest territories > montana ≈ idaho), and wolves from alaska showed significantly higher zinc than other locations ...	2010	20972865
restoration of genetic connectivity among northern rockies wolf populations.	probably no conservation genetics issue is currently more controversial than the question of whether grey wolves (canis lupus) in the northern rockies have recovered to genetically effective levels. following the dispersal-based recolonization of northwestern montana from canada, and reintroductions to yellowstone and central idaho, wolves have vastly exceeded population recovery goals of 300 wolves distributed in at least 10 breeding pairs in each of wyoming, idaho and montana. with >1700 wolve ...	2010	21040035
ecosystem scale declines in elk recruitment and population growth with wolf colonization: a before-after-control-impact approach.	the reintroduction of wolves (canis lupus) to yellowstone provided the unusual opportunity for a quasi-experimental test of the effects of wolf predation on their primary prey (elk--cervus elaphus) in a system where top-down, bottom-up, and abiotic forces on prey population dynamics were closely and consistently monitored before and after reintroduction. here, we examined data from 33 years for 12 elk population segments spread across southwestern montana and northwestern wyoming in a large scal ...	2014	25028933
dances with anthrax: wolves (canis lupus) kill anthrax bacteremic plains bison (bison bison bison) in southwestern montana.	bacillus anthracis, the cause of anthrax, was recovered from two plains bison (bison bison bison) cows killed by wolves (canis lupus) in montana, usa, without associated wolf mortality in july 2010. this bison herd experienced an epizootic in summer 2008, killing ∼ 8% of the herd, the first documented in the region in several decades. no wolf deaths were associated with the 2008 event. surveillance has continued since 2008, with research, ranch, and wildlife personnel diligent during summer. as ...	2014	24484485