Interspecific effects of grey squirrels ( Sciurus carolinensis ) on the space use and population demography of red squirrels ( Sciurus vulgaris ) in conifer plantations

2000 ◽  
Vol 15 (3) ◽  
pp. 271-284 ◽  
Author(s):  
Luc A. Wauters ◽  
Peter W. W. Lurz ◽  
John Gurnell
Keyword(s):  
Space Use ◽  
Sciurus Carolinensis ◽  
Population Demography ◽  
Sciurus Vulgaris ◽  
Red Squirrels ◽  
Conifer Plantations ◽  
Grey Squirrels

Monitoring red squirrels Sciurus vulgaris and grey squirrels Sciurus carolinensis in Britain

Mammal Review ◽  
2004 ◽  
Vol 34 (1-2) ◽  
pp. 51-74 ◽  
Author(s):  
J. GURNELL ◽  
P. W. W. LURZ ◽  
M. D. F. SHIRLEY ◽  
S. CARTMEL ◽  
P. J. GARSON ◽  
...  
Keyword(s):  
Sciurus Carolinensis ◽  
Sciurus Vulgaris ◽  
Red Squirrels ◽  
Grey Squirrels

scholarly journals Natural strongholds for red squirrel conservation in Scotland

2021 ◽  
Vol 43 ◽  
pp. 93-108
Author(s):  
Andrew Slade ◽  
Andy White ◽  
Kenny Kortland ◽  
Peter W. W. Lurz
Keyword(s):  
Management Practice ◽  
Management Policy ◽  
Sciurus Carolinensis ◽  
Red Squirrel ◽  
Grey Squirrel ◽  
Case Scenario ◽  
Red Squirrels ◽  
Worst Case ◽  
Standard Management ◽  
Grey Squirrels

The Eurasian Red Squirrel (Sciurus vulgaris) is under threat from the invasive North American eastern Grey Squirrel (Sciurus carolinensis) with 80% of the remaining red squirrel populations in the British Isles found in Scotland. In this study we develop a spatially explicit mathematical model of the red and grey squirrel system and use it to assess the population viability of red squirrels across Scotland. In particular, we aim to identify existing forests – natural strongholds for red squirrels – that can successfully support red squirrels under UK Forestry Standard management and protect them from potential disease-mediated competition from grey squirrels. Our model results indicate that if current levels of grey squirrel control, which restrict or reduce the distribution of grey squirrels, are continued then there will be large expanses of forests in northern Scotland that support viable red squirrel populations. Model results that represent (hypothetical) scenarios where grey squirrel control no longer occurred indicated that grey squirrel range expansion and the process of red squirrel replacement would be slow. Model results for an assumed worst-case scenario where grey squirrels have expanded to all regions in Scotland identified forest regions – denoted natural strongholds – that could currently support red squirrels under UK Forestry Standard management practice. The results will be used to inform forest management policy and support a strategic review of red squirrel management by land management agencies and other stakeholders.

Translocated native pine martens Martes martes alter short‐term space use by invasive non‐native grey squirrels Sciurus carolinensis

2020 ◽  
Vol 57 (5) ◽  
pp. 903-913 ◽  
Author(s):  
Catherine M. McNicol ◽  
David Bavin ◽  
Stuart Bearhop ◽  
Mark Ferryman ◽  
Robin Gill ◽  
...  
Keyword(s):  
Space Use ◽  
Sciurus Carolinensis ◽  
Martes Martes ◽  
Short Term ◽  
Pine Martens ◽  
Grey Squirrels

scholarly journals New World origins for haemoparasites infecting United Kingdom grey squirrels (Sciurus carolinensis), as revealed by phylogenetic analysis of bartonella infecting squirrel populations in England and the United States

2002 ◽  
Vol 129 (3) ◽  
pp. 647-653 ◽  
Author(s):  
K. J. BOWN ◽  
B. A. ELLIS ◽  
R. J. BIRTLES ◽  
L. A. DURDEN ◽  
J. LELLO ◽  
...  
Keyword(s):  
United States ◽  
United Kingdom ◽  
New World ◽  
Phylogenetic Analyses ◽  
The United States ◽  
Sciurus Carolinensis ◽  
Red Squirrel ◽  
Red Squirrels ◽  
The United Kingdom ◽  
Grey Squirrels

Phylogenetic analyses of bartonella have suggested divergence between bartonellae that infect mammals native to the Old and New Worlds. We characterized bartonella isolated from Eastern grey squirrels (Sciurus carolinensis) in the United States and from grey and red squirrels (Sciurus vulgaris) in the United Kingdom by nucleotide sequence comparison (gltA and groEL). Isolates from grey squirrels in the United States and the United Kingdom were identical, and most similar to Bartonella vinsonii, a species associated with New World rodents. A single and novel bartonella genotype was obtained from all 12 red squirrel isolates. Although grey squirrels were first introduced into the United Kingdom over 125 years ago, they continue to be infected solely by the bartonella associated with grey squirrels native to the United States. These results illustrate that exotic species may be accompanied by the introduction and maintenance, over many generations, of their microparasites.

scholarly journals An Opportunistic Assessment of the Impact of Squirrelpox Disease Outbreaks upon a Red Squirrel Population Sympatric with Grey Squirrels in Wales

Animals ◽  
2022 ◽  
Vol 12 (1) ◽  
pp. 99
Author(s):  
Craig M. Shuttleworth ◽  
David Everest ◽  
Paul Holmes ◽  
Suzi Bell ◽  
Rachel Cripps
Keyword(s):  
Survival Rates ◽  
Disease Outbreaks ◽  
Sciurus Carolinensis ◽  
Red Squirrel ◽  
Grey Squirrel ◽  
Red Squirrels ◽  
Local Survival ◽  
Temporal And Spatial ◽  
The Impact ◽  
Grey Squirrels

Native red squirrels (Sciurus vulgaris) persisted in the coastal mainland woodlands of northern Gwynedd whilst sympatric with an invasive grey squirrel (Sciurus carolinensis) population suppressed by culling. Squirrelpox disease in the red squirrel population was recorded in 2017 and 2020/21. An autumn 2020 outbreak was associated with only 17.4% of animals caught and marked in the preceding June known to be present in March 2021. Despite an opportunistic data collection lacking the rigour of empirical experimental design, we observed low local survival rates similar to previously published accounts reported during major squirrelpox outbreaks. The use of a conservation dog to detect red squirrel carcasses resulted in positive detection and confirmation of a temporal and spatial expansion of one disease outbreak. The study is the first in Wales to use conservation dogs and the findings reinforce the vital strategic importance of geographical isolation reducing sympatry of red with grey squirrels in European regions where the introduced congener is a source of the squirrelpox infection.

Hepatozoon in Eurasian red squirrels Sciurus vulgaris, its taxonomic identity, and phylogenetic placement

2021 ◽  
Author(s):  
David Modrý ◽  
Lada Hofmannová ◽  
Petr Papežík ◽  
Karolina Majerová ◽  
Jan Votýpka ◽  
...  
Keyword(s):  
Sciurus Vulgaris ◽  
Red Squirrels ◽  
Phylogenetic Placement
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