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Effects of pathogen pressure on personal, behavioural and social immunity in ants

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  • Full or part time
    Prof Nathalie Stroeymeyt
  • Application Deadline
    No more applications being accepted
  • Funded PhD Project (Students Worldwide)
    Funded PhD Project (Students Worldwide)

Project Description

PhD position in collective behaviour and social immunity at the University of Fribourg (Switzerland)

A 4-year PhD position is available in the research group of Professor Nathalie Stroeymeyt in the Department of Biology, University of Fribourg, to study the effect of prolonged pathogen pressure on long-term investment in personal, behavioural and social immunity in ants.

Background
Group living offers favourable conditions for the spread of infectious diseases, because high population densities and frequent social contacts facilitate pathogen transmission. To mitigate that risk, social animals have evolved a variety of defence mechanisms to prevent the entry and propagation of pathogens within the group, ranging from a raised investment in personal immunity to highly coordinated collective sanitary actions (‘social immunity’). Recent studies have shown that social groups can also adopt organizational features, such as the subdivision into well-separated subgroups, which reduce epidemic risk through transmission bottleneck effects. However, the importance of organizational immunity features in disease risk management by real animal groups is still poorly understood. Our research adopts an empirical approach based on the experimental manipulations of garden ant colonies (Lasius niger) to (i) quantify the effect of social organization on disease transmission and test key predictions from network epidemiology, and (ii) evaluate the relative of importance of personal immunity, collective sanitary actions and organizational features under different environmental conditions and at different stages of development (for more detail see https://stroeymeyt-lab.ch/research).

The project
The goal of this project will be to understand how ant colonies adjust different components of their disease defences (personal immunity, collective sanitary actions and transmission-inhibiting social organization) in response to repeated disease challenges. The candidate will use controlled pathogen inoculations, physiological assays and immune gene expression analysis, automated behavioural tracking, social network analysis and monitoring of the transmission of real agents to uncover the effect of prolonged pathogen pressure on long-term investment in personal and social immunity. The project will elucidate whether ants use changes in spatial and social organisation as an active strategy to decrease disease risk.

Desired profile
We are looking for candidates with experience in quantitative behavioural analysis and programming and/or molecular biology techniques, and a willingness to apply a variety of approaches (behavioural tracking, writing own code to analyse the data, and lab work). A good working knowledge in statistics and experimental design is also desirable. Experience with social insects and insect immunity would be a plus. Candidates must be creative, motivated and passionate about science, have excellent oral and written communication skills, and be at ease working both independently and as part of a team. A Master’s degree (or equivalent) will be required prior to taking up the position.

The position
The position will be part of an overall project team consisting of two PhD students and two post-doctoral researchers (https://stroeymeyt-lab.ch/open-positions/) and will be fully funded for four years by an ERC Starting Grant. The salary will be set according to the guidelines of the University of Fribourg (c. 47’000 CHF per year).

Location
The Department of Biology at the University of Fribourg is a highly dynamic, international and interdisciplinary environment, spanning a wide range of research in evolution and ecology, behaviour, population genomics, and bioinformatics, developmental genetics, neurobiology, biochemistry and proteomics, across 27 groups (https://www3.unifr.ch/bio/en/).

Expected starting date
The starting date is flexible; the earliest possible start will be May 1st, 2019.

How to apply
Please send your application by email to [Email Address Removed]. Your application should consist of a single merged pdf file including: (i) a full CV and publication list, (ii) a 1-2 page research statement describing your main research interests and your relevant skillsets, how they developed, and how they relate to the proposed research project, (iii) the names and contact details of at least two referees, and (iv) copies of (or links to) your publications and/or your PhD thesis (if available). Evaluation of candidates will begin on February 15th, 2019, and continue until the position is filled.

Funding Notes

The position will be fully funded for four years by an ERC Starting Grant. The salary will be set according to the guidelines of the University of Fribourg (c. 47’000 CHF per year).

References

Stroeymeyt et al. (2014). Organisational immunity in social insects. Current Opinion in Insect Science 5, 1.
Stroeymeyt et al. (2018). Social network plasticity decreases disease transmission in a eusocial insect. Science 362, 941.



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