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https://www.readbyqxmd.com/read/29030315/natural-history-of-ixodes-affinis-in-virginia
#1
Robyn M Nadolny, Holly D Gaff
The ixodid tick species Ixodes affinis is expanding its range northward, changing the tick community population dynamics in the Mid-Atlantic United States. We present five years of surveillance on newly established populations of I. affinis throughout southeastern Virginia and discuss the habitat and host associations of I. affinis in this northernmost extent of its range. We found that I. affinis populations tend to persist once they are established, and populations tend to increase as ecological succession progresses, provided a vegetated understory persists...
September 29, 2017: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/28988304/levels-of-plasma-and-fecal-glucocorticoid-metabolites-following-an-acth-challenge-in-male-and-female-coyotes-canis-latrans
#2
Erika T Stevenson, Eric M Gese, Lorin A Neuman-Lee, Susannah S French
Knowledge of endocrine stress responses can be advantageous for understanding how animals respond to their environment. One tool in wildlife endocrinology is to measure the adrenocortical activity as a parameter of disturbance of animals. Fecal glucocorticoid metabolites (GCMs) provide a noninvasive assessment of adrenocortical activity. Using an adrenocorticotropic hormone (ACTH) challenge administered to 28 captive coyotes (Canis latrans), we measured the levels of plasma cortisol, and fecal cortisol and corticosterone metabolites (i...
October 7, 2017: Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology
https://www.readbyqxmd.com/read/28981825/the-influence-of-sniffing-on-airflow-and-odorant-deposition-in-the-canine-nasal-cavity
#3
Alex D Rygg, Blaire Van Valkenburgh, Brent A Craven
Nasal airflow plays a critical role in olfaction by transporting odorant from the environment to the olfactory epithelium, where chemical detection occurs. Most studies of olfaction neglect the unsteadiness of sniffing and assume that nasal airflow and odorant transport are "quasi-steady," wherein reality most mammals "sniff." Here, we perform computational fluid dynamics simulations of airflow and odorant deposition in an anatomically accurate model of the coyote (Canis latrans) nasal cavity during quiet breathing, a notional quasi-steady sniff, and unsteady sniffing to: quantify the influence of unsteady sniffing, assess the validity of the quasi-steady assumption, and investigate the functional advantages of sniffing compared to breathing...
October 1, 2017: Chemical Senses
https://www.readbyqxmd.com/read/28935611/introduction-of-canine-parvovirus-2-into-wildlife-on-the-island-of-newfoundland-canada
#4
Marta Canuti, Bruce Rodrigues, Hugh G Whitney, Andrew S Lang
Canine parvovirus-2 (CPV-2) and feline panleukopenia virus (FPV) (species Carnivore protoparvovirus 1, family Parvoviridae) cause a severe gastrointestinal disease associated with immune depression in a broad range of terrestrial carnivores. We report here the first molecular epidemiological investigation of protoparvoviruses on the Island of Newfoundland, Canada. In particular, we investigated red foxes (Vulpes vulpes deletrix) and lynx (Lynx canadensis subsolanus), two autochthonous species, and coyotes (Canis latrans), which immigrated onto the island during the 1980s...
September 18, 2017: Infection, Genetics and Evolution
https://www.readbyqxmd.com/read/28863171/studies-of-wolf-x-coyote-hybridization-via-artificial-insemination
#5
L David Mech, Cheryl S Asa, Margaret Callahan, Bruce W Christensen, Fran Smith, Julie K Young
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, and sperm quality of the F1 males fell within the fertile range for domestic dogs, but sperm motility and morphology, in particular, were low in F2 males at 10 months but improved in samples taken at 22 months of age...
2017: PloS One
https://www.readbyqxmd.com/read/28833978/mammal-diversity-and-metacommunity-dynamics-in-urban-green-spaces-implications-for-urban-wildlife-conservation
#6
Travis Gallo, Mason Fidino, Elizabeth W Lehrer, Seth B Magle
As urban growth expands and natural environments fragment, it is essential to understand the ecological roles fulfilled by urban green spaces. To evaluate how urban green spaces function as wildlife habitat, we estimated mammal diversity and metacommunity dynamics in city parks, cemeteries, golf courses, and natural areas throughout the greater Chicago, IL, USA region. We found similar ╬▒-diversity (with the exception of city parks), but remarkably dissimilar communities in different urban green spaces. Additionally, the type of urban green space greatly influenced species colonization and persistence rates...
August 21, 2017: Ecological Applications: a Publication of the Ecological Society of America
https://www.readbyqxmd.com/read/28829928/green-tree-frog-hyla-cinerea-and-ground-squirrel-xerospermophilus-spilosoma-mortality-attributed-to-inland-brevetoxin-transportation-at-padre-island-national-seashore-texas-2015
#7
Danielle E Buttke, Alicia Walker, I-Shuo Huang, Leanne Flewelling, Julia Lankton, Anne E Ballmann, Travis Clapp, James Lindsay, Paul V Zimba
On 16 September 2015, a red tide (Karenia brevis) bloom impacted coastal areas of Padre Island National Seashore Park. Two days later and about 0.9 km inland, 30-40 adult green tree frogs (Hyla cinerea) were found dead after displaying tremors, weakness, labored breathing, and other signs of neurologic impairment. A rainstorm, accompanied by high winds, rough surf, and high tides, which could have aerosolized brevetoxin, occurred on the morning of the mortality event. Frog carcasses were healthy but contained significant brevetoxin in tissues...
August 22, 2017: Journal of Wildlife Diseases
https://www.readbyqxmd.com/read/28821188/panmixia-and-limited-interspecific-introgression-in-coyotes-canis-latrans-from-west-virginia-and-virginia-usa
#8
Justin H Bohling, Lauren L Mastro, Jennifer R Adams, Eric M Gese, Sheldon F Owen, Lisette P Waits
The expansion of coyotes (Canis latrans) into the eastern United States has had major consequences for ecological communities and wildlife managers. Despite this, there has been little investigation of the genetics of coyotes across much of this region, especially outside of the northeast. Understanding patterns of genetic structure and interspecific introgression would provide insights into the colonization history of the species, its response to the modern environment, and interactions with other canids. We examined the genetic characteristics of 121 coyotes from the mid-Atlantic states of West Virginia and Virginia by genotyping 17 polymorphic nuclear DNA microsatellite loci...
September 1, 2017: Journal of Heredity
https://www.readbyqxmd.com/read/28639466/genetic-characterization-of-sarcoptes-scabiei-from-black-bears-ursus-americanus-and-other-hosts-in-the-eastern-united-states
#9
Sarah K Peltier, Justin D Brown, Mark Ternent, Kevin D Niedringhaus, Krysten Schuler, Elizabeth M Bunting, Megan Kirchgessner, Michael J Yabsley
Since the early 1990s there has been an increase in the number of cases and geographic expansion of severe mange in the black bear (Ursus americanus) population in Pennsylvania. Although there are 3 species of mites associated with mange in bears, Sarcoptes scabiei has been identified as the etiologic agent in these Pennsylvania cases. Historically, S. scabiei-associated mange in bears has been uncommon and sporadic, although it is widespread and relatively common in canid populations. To better understand this recent emergence of sarcoptic mange in bears in Pennsylvania and nearby states, we genetically characterized S...
October 2017: Journal of Parasitology
https://www.readbyqxmd.com/read/28616198/seed-dispersal-of-diospyros-virginiana-in-the-past-and-the-present-evidence-for-a-generalist-evolutionary-strategy
#10
Mimi Rebein, Charli N Davis, Helena Abad, Taylor Stone, Jillian Del Sol, Natalie Skinner, Matthew D Moran
Several North American trees are hypothesized to have lost their co-evolved seed disperser during the late-Pleistocene extinction and are therefore considered anachronistic. We tested this hypothesis for the American persimmon (Diospyros virginiana) by studying the effects of gut passage of proposed seed dispersers on seedling survival and growth, natural fruiting characteristics, and modern animal consumption patterns. We tested gut passage effects on persimmon seeds using three native living species, the raccoon (Procyon lotor), Virginia opossum (Didelphis virginiana), and coyote (Canis latrans), and two Pleistocene analogs; the Asian elephant (Elephas maximus) and alpaca (Vicugna pacos)...
June 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28420038/retrospective-evaluation-of-coyote-attacks-in-dogs-154-cases-1997-2012
#11
Virginia M Frauenthal, Philip Bergman, Robert J Murtaugh
OBJECTIVE: To describe the clinical presentation and outcome of known attacks in client-owned dogs caused by the common coyote, Canis latrans. DESIGN: Retrospective observational study. SETTING: Private referral hospital. ANIMALS: One hundred fifty-four client-owned dogs known to be attacked by coyotes. INTERVENTIONS: None. MEASUREMENTS AND MAIN RESULTS: Records from a private referral hospital from May 1997 through December 2012 were reviewed...
May 2017: Journal of Veterinary Emergency and Critical Care
https://www.readbyqxmd.com/read/28369822/improving-the-assessment-of-predator-functional-responses-by-considering-alternate-prey-and-predator-interactions
#12
K Chan, S Boutin, T J Hossie, C J Krebs, M O'Donoghue, D L Murray
To improve understanding of the complex and variable patterns of predator foraging behavior in natural systems, it is critical to determine how density-dependent predation and predator hunting success are mediated by alternate prey or predator interference. Despite considerable theory and debate seeking to place predator-prey interactions in a more realistic context, few empirical studies have quantified the role of alternate prey or intraspecific interactions on predator-prey dynamics. We assessed functional responses of two similarly sized, sympatric carnivores, lynx (Lynx canadensis) and coyotes (Canis latrans), foraging on common primary (snowshoe hares; Lepus americanus) and alternate (red squirrels; Tamiasciurus hudsonicus) prey in a natural system...
March 29, 2017: Ecology
https://www.readbyqxmd.com/read/28295537/investigation-of-techniques-to-measure-cortisol-and-testosterone-concentrations-in-coyote-hair
#13
Christopher J Schell, Julie K Young, Elizabeth V Lonsdorf, Jill M Mateo, Rachel M Santymire
Long-term noninvasive sampling for endangered or elusive species is particularly difficult due to the challenge of collecting fecal samples before hormone metabolite desiccation, as well as the difficulty in collecting a large enough sample size from all individuals. Hair samples may provide an environmentally stable alternative that provides a long-term assessment of stress and reproductive hormone profiles for captive, zoo, and wild mammals. Here, we extracted and analyzed both cortisol and testosterone in coyote (Canis latrans) hair for the first time...
March 10, 2017: Zoo Biology
https://www.readbyqxmd.com/read/28135133/use-of-remote-cameras-to-monitor-the-potential-prevalence-of-sarcoptic-mange-in-southern-texas-usa
#14
Kyle Brewster, Scott E Henke, Clay Hilton, Alfonso Ortega-S
Sarcoptic mange, caused by the mite Sarcoptes scabiei , is a common, highly contagious skin disease that has been reported from more than 100 species of mammals, including humans. Our objectives were to 1) determine the prevalence of sarcoptic mange within mammals from southern Texas, and 2) determine the efficacy of using remote cameras to estimate mange prevalence. We collected remote camera photographs from a 64-km(2) area and blood and skin scrapings from 166 mammals representing 12 species in southern Texas, US during 2012-13...
April 2017: Journal of Wildlife Diseases
https://www.readbyqxmd.com/read/28064464/ungulate-predation-and-ecological-roles-of-wolves-and-coyotes-in-eastern-north-america
#15
John F Benson, Karen M Loveless, Linda Y Rutledge, Brent R Patterson
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 predator in eastern deciduous forests and have previously been characterized as deer specialists that are inefficient predators of moose because of their smaller size relative to gray wolves (C...
April 2017: Ecological Applications: a Publication of the Ecological Society of America
https://www.readbyqxmd.com/read/28002495/space-use-and-habitat-selection-by-resident-and-transient-red-wolves-canis-rufus
#16
Joseph W Hinton, Christine Proctor, Marcella J Kelly, Frank T van Manen, Michael R Vaughan, Michael J Chamberlain
Recovery of large carnivores remains a challenge because complex spatial dynamics that facilitate population persistence are poorly understood. In particular, recovery of the critically endangered red wolf (Canis rufus) has been challenging because of its vulnerability to extinction via human-caused mortality and hybridization with coyotes (Canis latrans). Therefore, understanding red wolf space use and habitat selection is important to assist recovery because key aspects of wolf ecology such as interspecific competition, foraging, and habitat selection are well-known to influence population dynamics and persistence...
2016: PloS One
https://www.readbyqxmd.com/read/27843722/the-origin-of-the-lower-fourth-molar-in-canids-inferred-by-individual-variation
#17
Masakazu Asahara
BACKGROUND: An increase in tooth number is an exception during mammalian evolution. The acquisition of the lower fourth molar in the bat-eared fox (Otocyon megalotis, Canidae, Carnivora, Mammalia) is one example; however, its developmental origin is not clear. In some canids (Canidae), individual variation exist as supernumerary molar M4. This study focuses on the acquisition of the lower fourth molar in canids and proposes that the inhibitory cascade model can explain its origin. METHODS: Occlusal view projected area of lower molars was determined from 740 mandibles obtained from Canis latrans, Nyctereutes procyonoides, and Urocyon cinereoargenteus museum specimens...
2016: PeerJ
https://www.readbyqxmd.com/read/27733798/gastrointestinal-helminths-of-coyotes-canis-latrans-from-southeast-nebraska-and-shenandoah-area-of-iowa
#18
Whitni K Redman, Jay E Bryant, Gul Ahmad
AIM: This survey was carried out on the carcasses of 29 coyotes from Southeastern Nebraska and Shenandoah area of Iowa to document the helminths present in the intestinal track of these carnivorous animals. MATERIALS AND METHODS: A total of 29 adult coyote carcasses were generously donated in the autumn and winter (November-February) of 2014-2015 by trappers, fur buyers and hunters of Southeast Nebraska and Shenandoah area of Iowa. The intestine of individual animals were examined for the recovery of helminth parasites as per the established procedures...
September 2016: Veterinary World
https://www.readbyqxmd.com/read/27534529/lessons-for-livestock-genomics-from-genome-and-transcriptome-sequencing-in-cattle-and-other-mammals
#19
Jeremy F Taylor, Lynsey K Whitacre, Jesse L Hoff, Polyana C Tizioto, JaeWoo Kim, Jared E Decker, Robert D Schnabel
BACKGROUND: Decreasing sequencing costs and development of new protocols for characterizing global methylation, gene expression patterns and regulatory regions have stimulated the generation of large livestock datasets. Here, we discuss experiences in the analysis of whole-genome and transcriptome sequence data. METHODS: We analyzed whole-genome sequence (WGS) data from 132 individuals from five canid species (Canis familiaris, C. latrans, C. dingo, C. aureus and C...
August 17, 2016: Genetics, Selection, Evolution: GSE
https://www.readbyqxmd.com/read/27529290/bartonella-rochalimae-and-b-vinsonii-subsp-berkhoffii-in-wild-carnivores-from-colorado-usa
#20
Ying Bai, Amy Gilbert, Karen Fox, Lynn Osikowicz, Michael Kosoy
Spleen samples from 292 wild carnivores from Colorado, US were screened for Bartonella infection. Bartonella DNA was detected in coyotes ( Canis latrans ) (28%), striped skunks ( Mephitis mephitis ) (23%), red foxes ( Vulpes vulpes ) (27%), and raccoons ( Procyon lotor ) (8%) but not in black bears ( Ursus americanus ), gray foxes ( Urocyon cinereoargenteus ), and mountain lions ( Puma concolor ). Two Bartonella species, B. vinsonii subsp. berkhoffii and B. rochalimae, were identified. All 10 infected striped skunks exclusively carried B...
October 2016: Journal of Wildlife Diseases
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