scholarly journals Disease, invasions and conservation: no evidence of squirrelpox virus in grey squirrels introduced to Italy

2018 ◽  
Vol 22 (1) ◽  
pp. 14-23 ◽  
Author(s):  
C. Romeo ◽  
C. J. McInnes ◽  
T. D. Dale ◽  
C. Shuttleworth ◽  
S. Bertolino ◽  
...  
Keyword(s):  
Squirrelpox Virus ◽  
Grey Squirrels

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 Effects of Parasitism and Morphology on Squirrelpox Virus Seroprevalence in Grey Squirrels (Sciurus carolinensis)

PLoS ONE ◽  
2014 ◽  
Vol 9 (1) ◽  
pp. e83106 ◽  
Author(s):  
Natasha E. McGowan ◽  
Nikki J. Marks ◽  
Colin J. McInnes ◽  
David Deane ◽  
Aaron G. Maule ◽  
...  
Keyword(s):  
Sciurus Carolinensis ◽  
Squirrelpox Virus ◽  
Grey Squirrels

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

Parasites of Grey Squirrels in Cheshire, England

1979 ◽  
Vol 65 (3) ◽  
pp. 408 ◽  
Author(s):  
D. Britt ◽  
D. H. Molyneux
Keyword(s):  
Grey Squirrels

scholarly journals The dynamics of pine marten predation on red and grey squirrels

2020 ◽  
Vol 100 (3) ◽  
pp. 285-293
Author(s):  
Joshua P. Twining ◽  
W. Ian Montgomery ◽  
David G. Tosh
Keyword(s):  
Pine Marten ◽  
Grey Squirrels

scholarly journals Seasonal Expression of NGF and Its Cognate Receptors in the Ovaries of Grey Squirrels (Sciurus carolinensis)

Animals ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 1558
Author(s):  
Margherita Maranesi ◽  
Francesco Alessandro Palermo ◽  
Antonello Bufalari ◽  
Francesca Mercati ◽  
Daniele Paoloni ◽  
...  
Keyword(s):  
Gene Expression ◽  
Nerve Growth Factor ◽  
Growth Factor ◽  
Breeding Season ◽  
Granulosa Cells ◽  
Reproductive Physiology ◽  
Tyrosine Kinase Receptor ◽  
Grey Squirrel ◽  
Nerve Growth ◽  
Grey Squirrels

The grey squirrel is an invasive alien species that seriously threatens the conservation of the native red squirrel species. With the aim of characterizing the reproductive physiology of this species due to its great reproductive success, the function of the ovarian nerve growth factor (NGF) system was analyzed in a grey squirrel population living in central Italy. During the breeding and nonbreeding seasons, the ovarian presence, distribution, and gene expression of NGF, neurotrophic tyrosine kinase receptor 1 (NTRK1), and nerve growth factor receptor (NGFR), as well as NGF plasma concentrations, were evaluated in female grey squirrels. NGF was found in the luteal cells and in the thecal and granulosa cells of follicles, while NTRK1 and NGFR were only observed in follicular thecal and granulosa cells. NGF and NGFR transcripts were almost two-fold greater during the breeding season, while no seasonal differences were observed in NTRK1 gene expression. During the breeding season, NGFR was more expressed than NTRK1. Moreover, no changes were observed in NGF plasma levels during the reproductive cycle. The NGF system seems to be involved in regulating the ovarian cycle mainly via local modulation of NGF/NGFR, thus playing a role in the reproductive physiology of this grey squirrel population.

scholarly journals Do founder size, genetic diversity and structure influence rates of expansion of North American grey squirrels in Europe?

2014 ◽  
Vol 20 (8) ◽  
pp. 918-930 ◽  
Author(s):  
A. L. Signorile ◽  
J. Wang ◽  
P. W. W. Lurz ◽  
S. Bertolino ◽  
C. Carbone ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
North American ◽  
Genetic Diversity And Structure ◽  
Grey Squirrels
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