scholarly journals Modelling the spatial dynamics of parapoxvirus disease in red and grey squirrels: a possible cause of the decline in the red squirrel in the UK?

2000 ◽  
Vol 37 (6) ◽  
pp. 997-1012 ◽  
Author(s):  
S.P. Rushton ◽  
P.W.W. Lurz ◽  
J. Gurnell ◽  
R. Fuller
2010 ◽  
Vol 138 (7) ◽  
pp. 941-950 ◽  
Author(s):  
C. M. BRUEMMER ◽  
S. P. RUSHTON ◽  
J. GURNELL ◽  
P. W. W. LURZ ◽  
P. NETTLETON ◽  
...  

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.


2017 ◽  
Vol 7 (1) ◽  
pp. 74-78 ◽  
Author(s):  
Andrew Gorman-Murray

This commentary responds to Boyer, Dermott, James and MacLeavy’s examination of the post-recession regendering of care in the UK. My response is informed by my geographical position in Australia. I first discuss what I see as the key contributions of the paper: the socio-spatial dynamics of male care giving, and the significance of economic structures, employment conditions and workplace gender norms for the potential regendering of care. I then offer two sets of suggestions for further thinking and research on the geography of male care giving: nuanced attention to the diverse spaces and subjectivities of male care giving.


2021 ◽  
Vol 43 ◽  
pp. 93-108
Author(s):  
Andrew Slade ◽  
Andy White ◽  
Kenny Kortland ◽  
Peter W. W. Lurz

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.


2020 ◽  
Vol 7 (2) ◽  
pp. 191841 ◽  
Author(s):  
Joshua P. Twining ◽  
W. Ian Montgomery ◽  
Lily Price ◽  
Hansjoerg P. Kunc ◽  
David G. Tosh

Invasive species pose a serious threat to native species. In Europe, invasive grey squirrels ( Sciurus carolinensis ) have replaced native red squirrels ( Sciurus vulgaris ) in locations across Britain, Ireland and Italy. The European pine marten ( Martes martes ) can reverse the replacement of red squirrels by grey squirrels, but the underlying mechanism of how pine martens suppress grey squirrels is little understood. Research suggests the reversal process is driven by direct predation, but why the native red squirrel may be less susceptible than the invasive grey squirrel to predation by a commonly shared native predator, is unknown. A behavioural difference may exist with the native sciurid being more effective at avoiding predation by the pine marten with which they have a shared evolutionary history. In mammals, olfactory cues are used by prey species to avoid predators. To test whether anti-predator responses differ between the native red squirrel and the invasive grey squirrel, we exposed both species to scent cues of a shared native predator and quantified the responses of the two squirrel species. Red squirrels responded to pine marten scent by avoiding the feeder, increasing their vigilance and decreasing their feeding activity. By contrast, grey squirrels did not show any anti-predator behaviours in response to the scent of pine marten. Thus, differences in behavioural responses to a shared native predator may assist in explaining differing outcomes of species interactions between native and invasive prey species depending on the presence, abundance and exposure to native predators.


Author(s):  
Chris Philo

This chapter reflects upon Danny Dorling’s ‘forensic’ analysis of the spatial dynamics underlying Mrs Thatcher’s impact upon UK society. His innovative cartography, coupled to a remarkable facility with complex datasets, conclusively captures the deepening of socio-spatial inequalities that was integral (not incidental) to the Thatcherite project. The chapter also offers a thumbnail critical appraisal of Mrs Thatcher’s own understanding of ‘geography’. In one register, her approach might be cast as a ‘denying’ of the UK’s overall social geography, but in another it was envisioning a ‘tapestry’ of largely disconnected local social environments admonished constantly to compare and compete. Dorling claims that things could have been otherwise, since many regions of the world did not follow this path of ever-widening internal socio-spatial inequalities. Quite other, alternative visions of more equal and just geographies of the UK, antithetical to Mrs Thatcher’s geographical vision, should continue to feature on a progressive political agenda.


2019 ◽  
Author(s):  
Philip G. Cox ◽  
Philip J.R. Morris ◽  
Andrew C. Kitchener

AbstractIt is well-known that population fragmentation and isolation can lead to rapid morphological and functional divergence, with the effect being particularly well-documented in rodents. Here, we investigated whether such a phenomenon could be identified in the Eurasian red squirrel (Sciurus vulgaris), which was once widespread across the majority of Great Britain, but suffered a severe population decline across the 20th century, leaving a highly fragmented distribution. The aim was to test for morphological and biomechanical variation of the mandible between the remaining British red squirrel populations. Linear and geometric morphometric methods were used to analyse shape in a sample of over 250 squirrel mandibles from across the UK and Germany. Canonical variates analysis identified significant shape differences between most British red squirrel populations, but particularly between squirrels from Formby and those from other populations. Linear measurements showed that Formby red squirrels have a significantly lower mechanical advantage of the temporalis muscle, indicating that they are less efficient at gnawing. We suggest that this difference may be related to past supplemental feeding of Formby squirrels with peanuts, which are less mechanically resistant than food items that occur naturally in the diet of British red squirrels.


1999 ◽  
Vol 8 (s1) ◽  
pp. S55-S63 ◽  
Author(s):  
E. M. Barratt ◽  
J. Gurnell ◽  
G. Malarky ◽  
R. Deaville ◽  
M. W. Bruford

2020 ◽  
Vol 24 (2) ◽  
pp. 100-116
Author(s):  
Daniel Mallo ◽  
Armelle Tardiveau ◽  
Rorie Parsons

Over the last decade, we have witnessed renewed interest in design as a socially engaged practice. Much of the debates around ‘social design’ point towards myriad approaches and disciplinary fields interwoven with grass-roots initiatives and social movements. Among these, design activism has gained traction as critical spatial practice that operates on the fringes of commercial and institutional spheres.The temporal, spatial and experimental nature of design activism is well delineated in scholarship but its long-term effect on everyday urban environments remains elusive. Moreover, the influence of design activism on socio-spatial dynamics is indeed largely under researched. By mobilising social practice theory, this paper proposes a novel theorisation of design activism that sheds light on the social formations and collective practices catalysed through the activist impulse. This ontological shift embraces an understanding of the socio-material world through practice. Such characterisation of design activism underscores collective moments of integration of the constitutive elements of practice, encapsulated by Shove, Pantzar and Watson as ‘material, competence and meaning’.The authors' own empirical research, funded by the Economic and Social Research Council (ESRC) in the UK, reveals design activism as necessarily intertwined with other everyday practices – gardening, celebrating, playing – that coalesce around a shared sense of citizenship. It also advances the role of design activism in forging communities of practice: mutually supportive and self-sustaining groups emerging out of the personal relations sustained and organised around a practice of place making.


BMJ Open ◽  
2019 ◽  
Vol 9 (4) ◽  
pp. e024085 ◽  
Author(s):  
Lucy Cullen ◽  
Pippa Grenfell ◽  
Alison Rodger ◽  
Chloe Orkin ◽  
Sema Mandal ◽  
...  

ObjectivesIncreased test uptake for HIV and viral hepatitis is fast becoming a health priority at both national and global levels. Late diagnosis of these infections remains a critical public health concern in the UK. Recommendations have been issued to expand blood-borne virus (BBV) testing in alternative settings. Emergency departments (EDs) offer a potentially important point of testing. This paper presents findings from a qualitative study which aimed to explore the acceptability and feasibility of a routine opt-out combined BBV testing intervention implemented at an inner London ED.MethodsWe conducted 22 semistructured interviews with patients and service providers in the ED over a 4-month period during the intervention pilot. A grounded analytical approach was employed to conduct thematic analysis of qualitative study data.ResultsCore interrelating thematic areas, identified and analytically developed in relation to test intervention implementation and experience, included the following: the remaking of routine test procedure; notions of responsibility in relation to status knowledge and test engagement; the opportunity and constraints of the ED as a site for testing; and the renegotiation of testing cultures within and beyond the clinic space.ConclusionStudy findings demonstrate how relational and spatial dynamics specific to the ED setting shape test meaning and engagement. We found acceptability of the test practice was articulated through narratives of situated responsibility, with the value of the test offset by perceptions of health need and justification of the test expense. Participant accounts indicate that the nontargeted approach of the test affords a productive disruption to ‘at-risk’ identities, yet they also reveal limits to the test intervention’s ‘normalising’ effect. Evaluation of the intervention must attend to the situated dynamics of the test practice if opportunities of an opt-out BBV test procedure are to be fully realised. Findings also highlight the critical need to further evaluate post-test intervention practices and experiences.


2014 ◽  
Vol 16 (11) ◽  
pp. 2339-2350 ◽  
Author(s):  
Anna Lisa Signorile ◽  
Daniele Paoloni ◽  
Daniel C. Reuman

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