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Showing 1 to 17 of 17 for “"Sciurus carolinensis"”.
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Spatial ecology of grey squirrels (Sciurus carolinensis) in an urban environment
The North American eastern grey squirrel (Sciurus carolinensis) is a<br/>highly invasive species that has replaced the sympatric native Eurasian red<br/>squirrel (Sciurus vulgaris) across much of the United Kingdom through<br/>exploitative competition and disease spread. The city of Aberdeen …
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Ecology of frontier populations of the invasive grey squirrel (Sciurus carolinensis) in Ireland
… biological invaders. The eastern grey squirrel (Sciurus carolinensis) is the most commonly introduced squirrel species worldwide. This research addressed the grey squirrel invasion and frontier population biology. Novel results were generated through diverse research techniques. Public sighting …
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Effects of tannins on protein digestibility and detoxification activity in gray squirrels (Sciurus carolinensis)
Captive gray squirrels were fed acorns or diets containing commercial tannins to determine the effects of tannins on digestion and detoxification (glucuronidation) activity. In the Acorn experiment, Northern red oak acorns (Quercus rubra), white oak acorns (Q. alba), or rat chow were fed to …
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A new method of aging gray squirrels (Sciurus carolinensis) by use of cementum annuli
Squirrel teeth were decalcified in a modified formic acid-sodium citrate solution and sectioned longitudinally with a razor blade. The sections were stained with Harris' hematoxylin and eosin and viewed under a microscope using reflected light. Tooth development was used for separating spring and …
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A Comparison of Eastern Gray Squirrel (Sciurus Carolinensis) Nesting Behavior among Habitats Differing in Anthropogenic Disturbance
Eastern gray squirrels inhabit a large range of heterogeneous habitats and climates, and live with various levels of anthropogenic disturbance. Previous studies have examined this species in unmodified and modified surroundings; however, a comparison of populations between these habitats has yet to …
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Effect of a supplemental food supply on the reproductive attainment of the gray squirrel (Sciurus carolinensis)
The effect of a supplemental food supply on the reproductive attainment of the gray squirrel was investigated in the squirrel populations of two food supplemented Experimental and two Control woodlots near the campus of Virginia Polytechnic Institute and State University, Blacksburg, Virginia, from …
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A survey of the food habits of the gray squirrel (Sciurus carolinensis) in Montgomery County, Virginia
The examination of one-hundred-thirteen gray squirrel stomachs collected throughout the year revealed a total of seventy-eight food items eaten. Only four, however, contributed more than half of the entire diet for any season. In the fall, hickory nuts (36%), fungi (26%), white oak acorns (12%), …
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Behavioral differences in urban Sciurus carolinensis with varying human exposure as a model for synanthropic human-animal relationships
… and depend on humans for their survival. Sciurus carolinensis, the eastern gray squirrel, symbolizes a distinctive coexistence between human and wildlife as they are commonly fed in parks and gardens. They are native to the eastern United States. Where they are invasive, they are found …
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The role of seed attributes in eastern gray squirrel foraging
… of seed attributes in eastern gray squirrel (Sciurus carolinensis) foraging behavior from an evolutionary, economic, ecological and biochemical perspective. From an evolutionary perspective (chapter 2), I found that squirrel foraging behaviors are influenced by a combination of …
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The emergence of cryptococcus gattii in British Columbia : veterinary aspects
… Nasal colonization was identified in squirrels ( Sciurus carolinensis), horses, dogs and cats. Most of the animals sampled had no signs of systemic infection however asymptomatic infection, defined as the presence of cryptococcal antigen in the bloodstream in the absence of clinical symptoms, was …
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Ovarian and uterine changes of gray squirrels as affected by season, aged, reproductive state and exogenous hormones
… adult and 42 subadult female gray squirrels (Sciurus carolinensis) were collected over a period of one year between December, 1966 and November, 1967 in the vicinity of Blacksburg, Virginia. Each squirrel was classified as being in one of four reproductive states (vaginal orifice closed, …
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Ecology of Borrelia burgdorferi sensu lato and epidemiology of borrelial infections in Cumbria
… woodlands, (2) the role of grey squirrels (Sciurus carolinensis) in the natural maintenance of B. burgdorferi s.l. was assessed, and (3) a veterinarian-based survey of ticks infesting companion animals was completed. The most noteworthy findings in these studies were: (1) the phenologies of …
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An analysis of the effectiveness of law and policy in assisting in control and prevention of non-native invasive species spread in England and Wales.
… japonica Houtt), North American grey squirrel (Sciurus carolinensis Gmelin) and North American signal crayfish (Pacifastacus leniusculus Dana). To ensure a detailed review of these species was undertaken, and a systematic approach was also used. Questionnaires and semi-structured interviews were …
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How land use influences wildlife occupancy and species richness in the City of Cape Town
… (Atilax paludinosus; n = 27) and Grey squirrel (Sciurus carolinensis; n = 85) were the most frequently detected species across all three land–use types, with the Cape porcupine the most frequently detected across all transects. Species richness varied significantly between the three types of …
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Protozoan, helminth and arthropod parasites of the gray squirrel in southwestern Virginia
… survey of parasites of 176 gray squirrels. Sciurus carolinensis pennsylvanicus, Ord. 1815, was conducted from September, 1966, to July, 1969, in southwestern Virginia. Most of the hosts came from Montgomery County, some being taken also from Giles and Craig counties. Of that total, 167 were …
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An Investigation of patterns of mammalian scavenging in relation to vertebrate skeletal remains in a Northwestern European context: forensic applications.
… wood mouse (Apodemus sylvaticus), grey squirrel (Sciurus carolinensis), carrion crow, buzzard, Eurasian badger, and red fox. Scavenging activities by all scavenger species observed at remains were affected in various ways by seasonality, trophic resources, territoriality, insect activity, carcass …
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Effects of food on bald eagle distribution and abundance on the northern Chesapeake Bay: an experimental approach
… shad with mallards and eastern gray squirrels (Sciurus carolinensis) in captive eagle trials. Wild and captive eagles preferred catfish (P=0.0072 and P<0.0002, respectively), and showed no preference for gizzard shad, menhaden nor white perch. Wild eagles preferred gizzard shad over mallards in …