Publications

are pumas subordinate carnivores, and does it matter?	interspecific competition affects species fitness, community assemblages and structure, and the geographic distributions of species. established dominance hierarchies among species mitigate the need for fighting and contribute to the realized niche for subordinate species. this is especially important for apex predators, many of which simultaneous contend with the costs of competition with more dominant species and the costs associated with human hunting and lethal management.	2018	29379688
physiological impacts of housing maned wolves (chrysocyon brachyurus) with female relatives or unrelated males.	the maned wolf is a threatened canid species native to south america. previous studies have suggested the species exhibits induced ovulation. in captive breeding facilities, reproductive success is low while rates of neonatal mortality are high. females that are not recommended for breeding are frequently housed together. however there has never been a systematic study of the reproductive consequences of co-housing females. this study was conducted for three purposes, to: (1) corroborate the pre ...	2018	29913172
extraction of unerupted maxillary canine teeth in a maned wolf (chrysocyon brachyurus).	the purpose of this case report is to describe the diagnosis and treatment of unerupted canine teeth in a maned wolf. after physical examination, complete blood count, and serum biochemical profile, the animal underwent general anesthesia and head radiography was performed to confirm the diagnosis. the treatment consisted of the extraction of both maxillary canine teeth and clinical and radiographic follow-up of the right mandibular canine tooth.	2016	29955413
radiographic determination of pelvic limb orthopaedic measurements in maned wolf (chrysocyon brachyurus).	the aim of this study was to determine some radiographic reference values for hip joint, femur and patella in maned wolves. ten maned wolves (chrysocyon brachyurus), five live (g1) and five cadavers (g2), were used. there were no statistically significant differences in the radiological measurements between right and left pelvic limbs of the g1 and g2, except for mechanical lateral proximal femoral angle (mlpfa) in both groups. the comparison of the measurements between groups showed difference ...	2018	30033520
clinical, morphological, and molecular characterization of an undetermined babesia species in a maned wolf (chrysocyon brachyurus).	a possible novel babesia species infection of a maned wolf (chrysocyon brachyurus) was first reported in 2012. the current case details a confirmed report of a maned wolf with infection by an undetermined species of babesia. as the mortality and morbidity of babesiosis is high, this may become a significant concern to captive maned wolves, which are considered a near-threatened species by the world association of zoos and aquariums. the aim of this study is to report the clinical, morphological ...	2019	30245087
evidence of individual discrimination in the maned wolf long-distance extended-bark.	the acoustic channel is an efficient long-distance signalling system that may be especially effective for animals moving in the dark in a vast home range. the maned wolf's extended-bark is a long-range vocalization that functions as a mechanism to increase spatial distance among conspecifics as well as to enable pair-mate reunion. individual variations in this vocalization have been reported, but the possibility that they can be perceived and used by the species has never been tested. in our stu ...	2019	30528636
detection and prevalence of babesia spp. in american black bears (ursus americanus) from eastern and western north carolina, usa.	blood samples collected from american black bears (ursus americanus) in eastern and western north carolina, us, were analyzed for piroplasms. piroplasmids were detected in 17% (23/132) of the animals surveyed. we detected a babesia spp. previously identified in north american raccoons (procyon lotor) and a maned wolf (chrysocyon brachyurus); prevalence was 22% (14/64) and 13% (9/68) in the mountain and coastal black bear populations, respectively. the presence of the same babesia species in blac ...	2019	30694717
a novel babesia sp. associated with clinical signs of babesiosis in domestic cats in south africa.	feline babesiosis, sporadically reported from various countries, is of major clinical significance in south africa, particularly in certain coastal areas. babesia felis, b. leo, b. lengau and b. microti have been reported from domestic cats in south africa. blood specimens from domestic cats (n = 18) showing clinical signs consistent with feline babesiosis and confirmed to harbour babesia spp. piroplasms by microscopy of blood smears and/or reverse line blot (rlb) hybridization were further inve ...	2019	30909950
no evidence of sarcocystis calchasi involvement in mammalian meningoencephalitis of unknown origin.	sarcocystis calchasi has recently been identified as the cause of pigeon protozoal encephalitis, ppe, a lethal brain disease in pigeons and parrots. while only avian species have been identified so far to be susceptible to this pathogen as definitive or intermediate hosts, we speculated whether mammals may be susceptible as well, as in sarcocystis neurona and other related apicomplexan parasites. specifically, we hypothesized its involvement in mammalian meningoencephalitis of unknown origin, mu ...	2016	31014499
molecular evidence of babesia species in procyon cancrivorus (carnivora, procyonidae) in uruguay.	the crab-eating raccoon (procyon cancrivorus) is a carnivore widely distributed from southern central america to all south american countries except chile. in the southern cone of america, p. cancrivorus has been found parasitized by several amblyomma spp. particularly, in uruguay, a. aureolatum is the only tick found in this wild carnivore. piroplasmid hemoparasites were found in procyon lotor from north america and japan. in this work, molecular evidence babesia sp. dna was found in blood and ...	2018	31014881
hepatozoon sp. gamonts as an accidental finding in synovial liquid from an injured maned wolf (chrysocyon brachyurus) in southeastern brazil.	a free-living, adult male maned wolf (chrysocyon brachyurus) was referred to the governador "laudo natel" - fcav/unesp veterinary hospital after being found with skin lesions and a fracture on the right pelvic limb, which had to be amputated due to compromised integrity. around 20 days later, bilateral accentuated swollen on humerus-radius-ulna articulation was observed. the synovial liquid was drained and sent to the laboratory for synovial cytology with rosenfeld staining that revealed predomi ...	2020	31483033
first report of athesmia foxi goldberger and crane, 1911 (digenea, dicrocoeliidae) from chrysocyon brachyurus (illiger, 1815) (carnivora, canidae) and pathological findings.	chrysocyon brachyurus, the largest south american canid, is a native species of the brazilian cerrado. the present study is aimed to report the occurrence of the trematode, athesmia foxi, in the liver of a new host, c. brachyurus, and to describe its morphology and pathology. one c. brachyurus individual was necropsied and examined for the presence of parasites. worms were collected from the bile ducts and based on morphological and morphometrical characteristics, such as a relatively large, sle ...	2018	31662652
safety of and humoral immune response to the merial recombitek canine distemper virus vaccine in maned wolves (chrysocyon brachyurus).	this study evaluated the safety of and humoral response to the merial recombitek® recombinant canine distemper virus (rcdv) vaccine in maned wolves (n = 9, age 2-9 yr). all maned wolves had prior history of annual vaccination with the merial purevax® ferret rcdv vaccine. serum neutralization (sn) to cdv was measured prior to initial vaccination with the rcdv recombitek vaccine followed by a booster vaccination at 4-6 wk. final sn titers were obtained at 13 wk post initial vaccination. the maned ...	2020	31926530
simulating the consequences of roads for wildlife population dynamics.	rapidly expanding road networks have been a key driver of the fragmentation and isolation of many wildlife species, and are a source of significant mortality due to collisions with vehicles. but not all animals are affected equally by transportation infrastructure, and in most cases little is known about the population-scale consequences of roads for wildlife. even less information is available to characterize species' behavioral responses to roads. although research shows that maned wolves (chr ...	2020	31942086
ophthalmic contributions to assessing eyes of two neotropical canids: cerdocyon thous and chrysocyon brachyurus.	to describe selected ophthalmic tests and anatomical features of eyes of crab-eating foxes (cerdocyon thous) and maned wolves (chrysocyon brachyurus).	2020	31961037
bladder teratoma in a maned wolf (chrysocyon brachyurus).	teratomas are germ cell tumors, comprised of a mixture of tissue types and with tissue foreign to their site of origin.	2019	31998620
wild carnivores, domestic dogs and ticks: shared parasitism in the brazilian cerrado.	the increase of contact between natural and rural areas is prominent in brazil, due to agricultural activities and concern with the environmental conservation. in this context, domestic animals, wild fauna and humans are exposed to mutual exchange of parasites, microorganisms and diseases. we studied tick parasitism of wild carnivores and domestic dogs, and the environmental of questing ticks, in extensive cattle ranch areas intermingled with natural vegetation, and in a natural reserve, both in ...	2020	32102697
wild canids, domestic dogs and their pathogens in southeast brazil: disease threats for canid conservation.	wild canids are under many pressures, including habitat loss, fragmentation and disease. the current lack of information on the status of wildlife health may hamper conservation efforts in brazil. in this paper, we examined the prevalence of canine pathogens in 21 free-ranging wild canids, comprising 12 cerdocyon thous (crab-eating fox), 7 chrysocyon brachyurus (maned wolf), 2 lycalopex vetulus (hoary fox), and 70 non-vaccinated domestic dogs from the serra do cipó national park area, southeast ...	2010	32214695
parental behaviour in maned wolf chrysocyon brachyurus at belo horizonte zoo.	there is limited information on the reproductive behaviour of the maned wolf chrysocyon brachyurus. although it is a monogamous species, little is known about the ♂'s role in the rearing of pups. in 1994 a comparative study of the behaviour of two ♀♀ with new-born pups was carried out at belo horizonte zoo to try to establish the ♂'s role in rearing: one ♀ was housed alone with her pups throughout the observation period; the other ♂ was housed with the ♀ and pups for the first month and alone wi ...	1997	32336820
non-invasive sampling in itatiaia national park, brazil: wild mammal parasite detection.	non-invasive sampling through faecal collection is one of the most cost-effective alternatives for monitoring of free-living wild mammals, as it provides information on animal taxonomy as well as the dynamics of the gastrointestinal parasites that potentially infect these animals. in this context, this study aimed to perform an epidemiological survey of gastrointestinal parasites using non-invasive faecal samples from carnivores and artiodactyls identified by stool macroscopy, guard hair morphol ...	2020	32807197
climate and land-use change will lead to a faunal "savannization" on tropical rainforests.	humans have fragmented, reduced or altered the biodiversity in tropical forests around the world. climate and land-use change act synergistically, increasing drought and fire frequencies, converting several tropical rainforests into derived savannas, a phenomenon known as "savannization." yet, we lack a full understanding of the faunal changes in response to the transformation of plant communities. we argue that the composition of vertebrate assemblages in ecotone regions of forest-savanna trans ...	2020	33006792
wild and domestic canids and their interactions in the transmission cycles of trypanosoma cruzi and leishmania spp. in an area of the brazilian cerrado.	trypanosoma cruzi and leishmania spp. are parasites that infect multiple hosts including canids, considered bioaccumulators of parasites. deforestation in the cerrado biome has resulted in the exposure of wild canids to anthropized areas, where they may establish ecological and epidemiological relationships with domestic dogs. we evaluated the infection by trypanosomatids in canids from a cerrado agroecosystem between 2013 and 2017. samples of wild canids (blood, bone marrow and skin) and dogs ( ...	2020	33036238
canine distemper outbreak by natural infection in a group of vaccinated maned wolves in captivity.	canine distemper virus (cdv) is one of the most significantinfectious disease threats to the health and conservation of free-ranging and captive wild carnivores. cdv vaccination using recombinant canarypox-based vaccines has been recommended for maned wolf (chrysocyon brachyurus) after the failure of modified live vaccines that induced disease in vaccinated animals. here, we report a cdv outbreak in a captive population of maned wolves that were previously vaccinated. five juveniles and one adul ...	2021	33429927
naturally acquired infectious canine hepatitis in two captive maned wolf (chrysocyon brachyurus) puppies.	we report the clinicopathological manifestations of canine adenovirus type 1 (cav 1) infection in captive-born naturally infected maned wolves (chrysocyon brachyurus). two 3-month-old maned wolves presented with lethargy, emesis, dehydration, pallor, hypothermia, leucocytosis, neutrophilia, lymphopaenia and thrombocytopaenia. one of the puppies died shortly after admission, with gross changes that included marked gastrointestinal petechiae, splenomegaly, hepatomegaly and pulmonary haemorrhage. h ...	2021	34340805