scholarly journals Recalibrating risk: Implications of squirrelpox virus for successful red squirrel translocations within mainland UK

2020 ◽  
Author(s):  
Craig M. Shuttleworth ◽  
Deborah Brady ◽  
Paul Cross ◽  
Laura Gardner ◽  
Andrew Greenwood ◽  
...  
Keyword(s):  
Red Squirrel ◽  
Squirrelpox Virus

Epidemiology of squirrelpox virus in grey squirrels in the UK

2010 ◽  
Vol 138 (7) ◽  
pp. 941-950 ◽  
Author(s):  
C. M. BRUEMMER ◽  
S. P. RUSHTON ◽  
J. GURNELL ◽  
P. W. W. LURZ ◽  
P. NETTLETON ◽  
...  
Keyword(s):  
Disease Transmission ◽  
Structural Equation ◽  
Reservoir Host ◽  
Red Squirrel ◽  
Grey Squirrel ◽  
Management Options ◽  
Contact Points ◽  
Squirrelpox Virus ◽  
The Uk ◽  
Grey Squirrels

SUMMARYThe dramatic decline of the native red squirrel in the UK has been attributed to both direct and disease-mediated competition with the grey squirrel where the competitor acts as a reservoir host of squirrelpox virus (SQPV). SQPV is threatening red squirrel conservation efforts, yet little is known about its epidemiology. We analysed seroprevalence of antibody against SQPV in grey squirrels from northern England and the Scottish Borders in relation to season, weather, sex, and body weight using Generalized Linear Models in conjunction with Structural Equation Modelling. Results indicated a heterogeneous prevalence pattern which is male-biased, increases with weight and varies seasonally. Seroprevalence rose during the autumn and peaked in spring. Weather parameters had an indirect effect on SQPV antibody status. Our findings point towards a direct disease transmission route, which includes environmental contamination. Red squirrel conservation management options should therefore seek to minimize squirrel contact points.

scholarly journals Implications of squirrelpox virus for successful red squirrel translocations within mainland UK

2020 ◽  
Vol 2 (6) ◽  
Author(s):  
Anthony W. Sainsbury ◽  
Julian Chantrey ◽  
John G. Ewen ◽  
John Gurnell ◽  
Peter Hudson ◽  
...  
Keyword(s):  
Red Squirrel ◽  
Squirrelpox Virus

Managed parks as a refuge for the threatened red squirrel ( Sciurus vulgaris ) in light of human disturbance

2017 ◽  
Vol 211 ◽  
pp. 29-36 ◽  
Author(s):  
Amy Haigh ◽  
Fidelma Butler ◽  
Ruth O'Riordan ◽  
Rupert Palme
Keyword(s):  
Human Disturbance ◽  
Red Squirrel ◽  
Sciurus Vulgaris

Red squirrel dreys

2009 ◽  
Vol 162 (4) ◽  
pp. 528-533 ◽  
Author(s):  
A. M. Tittensor
Keyword(s):  
Red Squirrel

Squirrelpox Virus in Red Squirrels (Sciurus vulgaris) in the Republic of Ireland

2013 ◽  
Vol 49 (4) ◽  
pp. 1070-1073 ◽  
Author(s):  
Favel Naulty ◽  
David Everest ◽  
Neil D. Warnock ◽  
Kevin Phelan ◽  
John J. Callanan
Keyword(s):  
Sciurus Vulgaris ◽  
Red Squirrels ◽  
Republic Of Ireland ◽  
The Republic ◽  
Squirrelpox Virus

scholarly journals Excavation of Red Squirrel (Tamiasciurus hudsonicus) Middens by Bears (Ursus spp.) in Limber Pine (Pinus flexilis) Habitat in Banff National Park, Alberta

2017 ◽  
Vol 130 (4) ◽  
pp. 281 ◽  
Author(s):  
David Hamer
Keyword(s):  
National Park ◽  
Forest Cover ◽  
Habitat Characteristics ◽  
Tamiasciurus Hudsonicus ◽  
Red Squirrel ◽  
Limber Pine ◽  
Banff National Park ◽  
Pine Stands ◽  
Study Sites ◽  
Pinus Spp

Bears (Ursus spp.) in North America eat the seeds of several pines (Pinus spp.), including Limber Pine (P. flexilis E. James). Information on use of Limber Pine in Canada is limited to a report of three bear scats containing pine seeds found in Limber Pine stands of southwestern Alberta. After my preliminary fieldwork in Banff National Park revealed that bears were eating seeds of Limber Pine there, I conducted a field study in 2014–2015 to assess this use. Because bears typically obtain pine seeds from cone caches (middens) made by Red Squirrels (Tamiasciurus hudsonicus), I described the abundance, habitat characteristics, and use by bears of Red Squirrel middens in and adjacent to Limber Pine stands at six study sites. On Bow River escarpments, I found abundant Limber Pines (basal area 1–9 m2/ha) and middens (0.8 middens/ha, standard deviation [SD] 0.2). Of 24 middens, 13 (54%) had been excavated by bears, and three bear scats composed of pine seeds were found beside middens. Although Limber Pines occurred on steep, xeric, windswept slopes (mean 28°, SD 3), middens occurred on moderate slopes (mean 12°, SD 3) in escarpment gullies and at the toe of slopes in forests of other species, particularly Douglas-fir (Pseudotsuga menziesii). At the five other study sites, I found little or no use of Limber Pine seeds by bears, suggesting that Limber Pine habitat may be little used by bears unless the pines are interspersed with (non-Limber Pine) habitat with greater forest cover and less-steep slopes where squirrels establish middens. These observations provide managers with an additional piece of information regarding potential drivers of bear activity in the human-dominated landscape of Banff National Park’s lower Bow Valley.

scholarly journals Loss of Octarepeats in Two Processed Prion Pseudogenes in the Red Squirrel, Sciurus vulgaris

2010 ◽  
Vol 71 (5-6) ◽  
pp. 356-363
Author(s):  
Ole Madsen ◽  
Timothy T. Kortum ◽  
Marlinda Hupkes ◽  
Wouter Kohlen ◽  
Teun van Rheede ◽  
...  
Keyword(s):  
Red Squirrel ◽  
Sciurus Vulgaris

SEASONAL DAMAGE BY INSECTS AND SQUIRRELS TO FEMALE REPRODUCTIVE STRUCTURES OF BLACK SPRUCE, PICEA MARIANA (MILL.) B.S.P.

1988 ◽  
Vol 120 (12) ◽  
pp. 1113-1121 ◽  
Author(s):  
Y.H. Prévost ◽  
J.E. Laing ◽  
V.F. Haavisto
Keyword(s):  
Picea Mariana ◽  
Black Spruce ◽  
Choristoneura Fumiferana ◽  
Tamiasciurus Hudsonicus ◽  
Red Squirrel ◽  
Red Squirrels ◽  
Reproductive Structures ◽  
Cone Axis ◽  
Viable Seeds ◽  
Cone Growth

AbstractThe seasonal damage to female reproductive structures (buds, flowers, and cones) of black spruce, Picea mariana (Mill.) B.S.P., was assessed during 1983 and 1984. Nineteen insects (five Orders) and the red squirrel, Tamiasciurus hudsonicus (Erxleben), were found feeding on these reproductive structures. Collectively, these organisms damaged 88.9 and 53.5% of the cones in 1983 and 1984, respectively. In the 2 years, Lepidoptera damaged 61.8% of the cones in 1983 and 44.4% of the cones in 1984. The spruce budworm, Choristoneura fumiferana (Clem.), and the spruce coneworm, Dioryctria reniculelloides Mut. and Mun., were the most important pests. Cones damaged by Lepidoptera could be classed into three categories: (a) severe, yielding no seeds; (b) moderate, yielding 22.3 seeds per cone; and (c) light, yielding 37.5 seeds per cone. Undamaged cones yielded on average 39.9 seeds per cone. Red squirrels removed 18.8% of the cones in 1983 and none in 1984. The spruce cone axis midge, Dasineura rachiphaga Tripp, and the spruce cone maggot, Lasiomma anthracinum (Czerny), caused minor damage in both years. Feeding by spruce cone axis midge did not reduce cone growth significantly or the number of viable seeds per cone, but feeding by the spruce cone maggot did. During both years new damage by insects to the female reproductive structures of the experimental trees was not observed after mid-July. In 1983 damage by red squirrels occurred from early to late September. In 1984 damage to cones on trees treated with dimethoate was 15.6% compared with 53.5% for untreated trees, without an increase in the number of aborted cones.

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