| immunohistochemical evaluation of a malignant phecochromocytoma in a wolfdog. | a malignant pheochromocytoma with multiple metastases was diagnosed in a 7-year-old male wolfdog that resulted from a cross between an eastern timber wolf (canis lupus lycaon) and an alaskan malamute. a yellowish white neoplastic mass approximately 10 cm diameter was found in the right adrenal gland. the neoplasm penetrated through the wall of the caudal vena cava. a diagnosis of pheochromocytoma was established by histopathologic and immunohistochemical procedures. immunohistochemically, the ne ... | 2001 | 11467480 |
| pitfalls of applying adaptive management to a wolf population in algonquin provincial park, ontario. | we examined adaptive management (am), applied as a science with testable and falsifiable hypothesis, in the context of a large carnivore population, specifically to wolf (canis lupus lycaon) management in algonquin provincial park, ontario, canada. evidence of a population decline was based upon 12 years of data on 137 different radio-collared wolves. because human killing accounted for an average of 66% of deaths, and most killing occurred adjacent to the park, a management prescription of comp ... | 2006 | 16465565 |
| ungulate predation and ecological roles of wolves and coyotes in eastern north america. | understanding the ecological roles of species that influence ecosystem processes is a central goal of ecology and conservation biology. eastern coyotes (canis latrans) have ascended to the role of apex predator across much of eastern north america since the extirpation of wolves (canis spp.) and there has been considerable confusion regarding their ability to prey on ungulates and their ecological niche relative to wolves. eastern wolves (c. lycaon) are thought to have been the historical top pr ... | 2017 | 28064464 |
| production of hybrids between western gray wolves and western coyotes. | using artificial insemination we attempted to produce hybrids between captive, male, western, gray wolves (canis lupus) and female, western coyotes (canis latrans) to determine whether their gametes would be compatible and the coyotes could produce and nurture offspring. the results contribute new information to an ongoing controversy over whether the eastern wolf (canis lycaon) is a valid unique species that could be subject to the u. s. endangered species act. attempts with transcervically dep ... | 2014 | 24586418 |
| inter-specific territoriality in a canis hybrid zone: spatial segregation between wolves, coyotes, and hybrids. | gray wolves (canis lupus) and coyotes (canis latrans) generally exhibit intraspecific territoriality manifesting in spatial segregation between adjacent packs. however, previous studies have found a high degree of interspecific spatial overlap between sympatric wolves and coyotes. eastern wolves (canis lycaon) are the most common wolf in and around algonquin provincial park (app), ontario, canada and hybridize with sympatric gray wolves and coyotes. we hypothesized that all canis types (wolves, ... | 2013 | 23864253 |
| rad sequencing and genomic simulations resolve hybrid origins within north american canis. | top predators are disappearing worldwide, significantly changing ecosystems that depend on top-down regulation. conflict with humans remains the primary roadblock for large carnivore conservation, but for the eastern wolf (canis lycaon), disagreement over its evolutionary origins presents a significant barrier to conservation in canada and has impeded protection for grey wolves (canis lupus) in the usa. here, we use 127,235 single-nucleotide polymorphisms (snps) identified from restriction-site ... | 2015 | 26156129 |
| genetic analysis of historic western great lakes region wolf samples reveals early canis lupus/lycaon hybridization. | the genetic status of wolves in the western great lakes region has received increased attention following the decision to remove them from protection under the us endangered species act. a recent study of mitochondrial dna has suggested that the recovered wolf population is not genetically representative of the historic population. we present microsatellite genotype data on three historic samples and compare them with extant populations, and interpret published genetic data to show that the pre- ... | 2009 | 18940770 |
| y-chromosome evidence supports widespread signatures of three-species canis hybridization in eastern north america. | there has been considerable discussion on the origin of the red wolf and eastern wolf and their evolution independent of the gray wolf. we analyzed mitochondrial dna (mtdna) and a y-chromosome intron sequence in combination with y-chromosome microsatellites from wolves and coyotes within the range of extensive wolf-coyote hybridization, that is, eastern north america. the detection of divergent y-chromosome haplotypes in the historic range of the eastern wolf is concordant with earlier mtdna fin ... | 2012 | 23139890 |
| intense harvesting of eastern wolves facilitated hybridization with coyotes. | despite ethical arguments against lethal control of wildlife populations, culling is routinely used for the management of predators, invasive or pest species, and infectious diseases. here, we demonstrate that culling of wildlife can have unforeseen impacts that can be detrimental to future conservation efforts. specifically, we analyzed genetic data from eastern wolves (canis lycaon) sampled in algonquin provincial park (app), ontario, canada from 1964 to 2007. research culls in 1964 and 1965 k ... | 2012 | 22408723 |
| studies of wolf x coyote hybridization via artificial insemination. | following the production of western gray wolf (canis lupus) x western coyote (canis latrans) hybrids via artificial insemination (ai), the present article documents that the hybrids survived in captivity for at least 4 years and successfully bred with each other. it further reports that backcrossing one of the hybrids to a male gray wolf by ai also resulted in the birth of live pups that have survived for at least 10 months. all male hybrids (f1 and f2) produced sperm by about 10 months of age, ... | 2017 | 28863171 |
| population genomic analysis of north american eastern wolves (canis lycaon) supports their conservation priority status. | the threatened eastern wolf is found predominantly in protected areas of central ontario and has an evolutionary history obscured by interbreeding with coyotes and gray wolves, which challenges its conservation status and subsequent management. here, we used a population genomics approach to uncover spatial patterns of variation in 281 canids in central ontario and the great lakes region. this represents the first genome-wide single nucleotide polymorphism (snp) dataset with substantial sample s ... | 2018 | 30518163 |
| ancient hybrid origin of the eastern wolf not yet off the table: a comment on rutledge et al. (2015). | a recent study of north american canids by rutledge et al. (biol. lett. 11, 20150303 (doi:10.1098/rsbl.2015.0303)) refutes the hypothesized hybrid origin of the eastern wolf (ew) based on genomic evidence against very recent hybridization. however, the analyses do not rule out the possibility of more ancient hybridization. claims to have resolved the evolutionary origin of the ew are therefore inappropriate. importantly, though, we plead that uncertainty about the ancient history of the taxon sh ... | 2016 | 26843554 |
| field implantation of intraperitoneal radiotransmitters in eastern wolf (canis lycaon ) pups using inhalation anesthesia with sevoflurane. | in a study of wolf pup survival, intraperitoneal radio transmitters were surgically implanted in 53 (27 male and 26 female) 3.5- to 8-wk-old eastern wolf (canis lycaon) pups at den sites in algonquin provincial park, ontario, canada, over two whelping seasons (2004 and 2005). pups were manually removed from dens and initially injected with butorphanol at a dosage of 0.1 mg/kg for sedation and intra-operative analgesia. anesthesia was induced and maintained with 3% sevoflurane in oxygen via a fac ... | 2007 | 17984267 |