| endoparasites of the coyote (canis latrans), a recent migrant to insular newfoundland. | this study provides the first data on the helminth fauna of the coyote (canis latrans) in insular newfoundland. sixty-nine coyotes were collected between 2001 and 2003 and examined for helminths. a total of 10 helminth species were recorded: the cestodes taenia ovis krabbei (9%), taenia hydatigena (4%), taenia pisiformis (1%), and mesocestoides spp. (5%); and the nematodes toxocara canis (19%), toxascaris leonina (1%), crenosoma vulpis (19%), physaloptera rara (6%), uncinaria stenocephala (3%), ... | 2009 | 19901402 |
| elucidating the spread of the emerging canid nematode angiostrongylus vasorum between palaearctic and nearctic ecozones. | angiostrongylus vasorum is an emerging parasite that is currently distributed through western europe and parts of south america. an isolated population is also present in newfoundland, canada. this presents a risk of onward spread into north america, but its origin is unknown. to ascertain the phylogeographic relationships and genetic diversity of a. vasorum within the western palaearctic and eastern nearctic ecozones, a total of 143 adult and larval nematode specimens were collected from foxes ... | 2010 | 20139034 |
| sequence analysis of three pigmentation genes in the newfoundland population of canis latrans links the golden retriever mc1r variant to white coat color in coyotes. | three genes, mc1r, agouti, and cbd103, interact in a type-switching process that controls much of the pigmentation variation observed in mammals. a deletion in the cbd103 gene is responsible for dominant black color in dogs, while the white-phased black bear ("spirit bear") of british columbia, canada, is the lightest documented color variant caused by a mutation in mc1r. rare all-white animals have recently been discovered in a new northeastern population of the coyote in insular newfoundland a ... | 2013 | 23297074 |
| phase-dependent climate-predator interactions explain three decades of variation in neonatal caribou survival. | climate can have direct and indirect effects on population dynamics via changes in resource competition or predation risk, but this influence may be modulated by density- or phase-dependent processes. we hypothesized that for ungulates, climatic conditions close to parturition have a greater influence on the predation risk of neonates during population declines, when females are already under nutritional stress triggered by food limitation. we examined the presence of phase-dependent climate-pre ... | 2016 | 26529139 |
| angiostrongylus vasorum infection in a coyote (canis latrans) from newfoundland and labrador, canada. | tissue samples and feces were collected from a dead, adult female coyote (canis latrans) found at the side of the road in late march 2003 in the avalon peninsula region of newfoundland, canada. the coyote apparently died of vehicular-related trauma. samples of lung, brain, heart, liver, and kidney were fixed in formalin and submitted for histologic examination. the entire remaining lung and heart also were submitted for examination. the coyote was diagnosed with moderate, multifocal, granulomato ... | 2005 | 16456176 |
| patterns of mhc-drb1 polymorphism in a post-glacial island canid, the newfoundland red fox (vulpes vulpes deletrix), suggest balancing selection at species and population timescales. | as the only native insular newfoundland canid between the extinction of the wolf in the 1930s and the recent arrival of coyotes, the red fox (vulpes vulpes deletrix bangs 1898) poses interesting questions about genetic distinctiveness and the post-glacial colonization history of the island's depauperate mammalian fauna. here, we characterized genetic variability at the major histocompatibility complex (mhc) class ii dr β1 domain (drb1) locus in 28 red foxes from six sampling localities island-wi ... | 2016 | 26894280 |
| impact of non-native terrestrial mammals on the structure of the terrestrial mammal food web of newfoundland, canada. | the island of newfoundland is unique because it has as many non-native terrestrial mammals as native ones. the impacts of non-native species on native flora and fauna can be profound and invasive species have been identified as one of the primary drivers of species extinction. few studies, however, have investigated the effects of a non-native species assemblage on community and ecosystem properties. we reviewed the literature to build the first terrestrial mammal food web for the island of newf ... | 2014 | 25170923 |
| enhanced understanding of predator-prey relationships using molecular methods to identify predator species, individual and sex. | predator species identification is an important step in understanding predator-prey interactions, but predator identifications using kill site observations are often unreliable. we used molecular tools to analyse predator saliva, scat and hair from caribou calf kills in newfoundland, canada to identify the predator species, individual and sex. we sampled dna from 32 carcasses using cotton swabs to collect predator saliva. we used fragment length analysis and sequencing of mitochondrial dna to di ... | 2014 | 23957886 |