Aberdeen PhD: Mercury, Selenium and Physiological Resilience in Marine Mammals

Aberdeen PhD: Mercury, Selenium and Physiological Resilience in Marine Mammals

Research Question and Applicant Fit

This four-year Aberdeen doctorate asks when selenium-mediated buffering of lifelong mercury exposure becomes a physiological cost. It combines existing-data synthesis, comparative genomics and pathway networks, with optional archived-tissue chemistry. The team has recent, closely related chemical and proteomic studies. Chinese applicants may compete for EASTBIO awards with an international top-up waiver for successful awardees; the £22,437 2027/28 stipend remains an estimate. Apply to one EASTBIO title only, with application and both references due 16 November 2026, 23:59 GMT. Current acceptance status has not been confirmed. Before applying, discuss the available datasets, archived-tissue permissions and computational fallback with Derous, then follow the host-specific email route.

Research Problem and Doctoral Work

Marine mammals can retain substantial mercury (Hg) burdens over long lives without obvious toxicity. Selenium (Se) can bind/sequester Hg, but is also needed for antioxidant defence, metabolism and cellular function. The unresolved question is when buffering becomes a physiological cost, and whether species differ in their compensation limits. High total Hg is therefore neither proof of damage nor proof of harmless adaptation; the project explicitly rejects an assumed universal toxicity threshold.

Advertised work has four connected components: existing datasets plus systematic synthesis of published concentrations across species and ages; comparative genomics of proteins/genes relevant to Hg sensitivity, detoxification and Se metabolism across marine mammals and other vertebrates; protein-interaction and biological-pathway networks connecting molecular interactions to possible physiological consequences; and an integrative quantitative framework for resilience and its limits. Elemental/molecular analysis of archived tissues and advanced chemistry/metallomics are conditional opportunities, not guaranteed core experiments. Training includes ecotoxicology, genomics, bioinformatics, systematic review/meta-analysis, networks and quantitative modelling. The EASTBIO 2027 application instructions direct applicants to the designated project directory. Official current recruitment route.

This is primarily an integrative computational/environmental-biology opportunity, with a possible archived-sample component. No new capture, live biopsy, experimental Hg exposure or animal licence is promised. Existing tissues in a collaborator's paper do not establish access for this student. First-year feasibility depends on data rights, tissue/species/age coverage, sample metadata and annotation quality.

Useful research angles include separating total burden from bioavailable chemical forms, testing age/species effects with phylogenetic non-independence, and assessing whether network conclusions survive annotation and evidence-quality uncertainty. These are analytical suggestions, not additional advertised tasks. Strandings are a selected population; apparent resilience can reflect survivor bias, and cross-sectional age differences are not individual life-course trajectories. Network enrichment and gene conservation generate mechanisms to test, not evidence of causal toxicity by themselves.

The British Toxicology Society distinguishes hazard from exposure-dependent risk, with population/ecosystem consequences central to ecotoxicology. The project's route from exposure to biological function fits that frontier, but a molecular association is not automatically a population-level risk assessment. Ecotoxicology and environmental assessment.

School, Programme and Field Context

The host and degree-awarding institution is the University of Aberdeen, Scotland, United Kingdom, School of Biological Sciences. Its Biological and Environmental Sciences PhD spans ecology, evolution, environment and ecophysiology, with methods/statistics training, retreats and postgraduate conferences. This provides a relevant environmental/organismal setting for a project crossing chemistry and genomics. The exact 2027 registration title/code and progression milestones are not published in the project; confirm them rather than assuming the administrative smmsn email changes the host school. School and doctoral programme.

REF 2021 Biological Sciences, UoA5, reports 18% four-star, 61% three-star and 16.50 staff FTE; the broader Earth Systems and Environmental Sciences, UoA7, reports 26% four-star, 62% three-star and 83.20 FTE. These are historical subject-unit assessments, not current world rankings or a rating of this specific team. Official subject results.

This is a four-year EASTBIO competition, normally starting 1 October 2027, not a joint degree with every partnership member. Core cohort/methods/professional training runs mainly in years 1–2; years 3–4 focus on research. The displayed 2026/27 calendar illustrates provision, not a fixed 2027/28 schedule. A standard 12-week non-academic PIPS outside the PhD project must be completed before the end of year 3, with planning by year 1. An application for up to £500 extra expenses may be possible for a placement over 50 miles away; it is not automatic funding or a guaranteed employer/job. Cohort training; Placement conditions.

Part-time availability is Home/UK only in this project. Visa-requiring students must register full-time, and EASTBIO expects residence within commuting distance except fieldwork/placements. The university's generic distance PhD provision does not override those studentship rules.

Supervisor and Lab Assessment

Davina Derous, currently Senior Lecturer in Biological Sciences/ACES, is the lead contact (davina.derous@abdn.ac.uk). Her research links organismal physiology, metabolism and molecular evidence; current marine-mammal proteomics demonstrates a route beyond concentration surveys. Marius Wenzel, whose current page header says Senior Lecturer, contributes phylogenomics, comparative genomics, transcriptomics, epigenomics and conservation genetics (marius.wenzel@abdn.ac.uk). An older biography line still says Lecturer since 2022; the current header is the stronger role statement. Long-read sequencing expertise does not mean this doctorate promises new sequencing. Derous current profile; Wenzel methods and activity.

Rebecca von Hellfeld, Research Fellow across Biological Sciences/ACES and Engineering's National Decommissioning Centre, adds Hg/environmental chemistry and food-web expertise (rebecca.vonhellfeld@abdn.ac.uk). Her appointment's remaining duration and day-to-day supervisory commitment are unpublished. The 22 October exact advert additionally names Dr Jörg Feldmann. The University of Graz current institute page identifies him as Professor and Head of its Institute of Chemistry; the source of that current role is separate from the Aberdeen host. His precise co-supervision allocation and any formal cross-institution arrangement remain unconfirmed; this does not establish a joint degree. Current Graz institutional role. von Hellfeld current profile.

Three recent primary studies are particularly informative:

• von Hellfeld and collaborators, Environmental Pollution 342:123027, 2024; online 26 November 2023, use scanning electron microscopy on liver, kidney, muscle and brain from one adult male bottlenose dolphin. It visualises organ-dependent HgSe particles around 400 nm–5 µm. This supports attention to chemical form and tissue compartment, not the assumption that total Hg means equal toxicity. It is a single-individual pilot; particle presence does not quantify whole-species protection, Se depletion or causal physiological damage. HgSe imaging primary paper

Bibliography: Rebecca von Hellfeld; Christoph Gade; Mariel ten Doeschate; Nicholas J. Davison; Andrew Brownlow; Lenka Mbadugha; Astley Hastings; Graeme Paton. High resolution visualisation of tiemannite microparticles, essential in the detoxification process of mercury in marine mammals. Environmental Pollution 342:123027 (2024). DOI: 10.1016/j.envpol.2023.123027.

• McCarthy and collaborators including von Hellfeld, Marine Mammal Science 42: e70170, 8 April 2026, analyse 269 tissue samples from 54 long-finned pilot whales from a single 2023 mass-stranding event. Skin–liver and skin–muscle associations differ between juveniles and adults, showing why age and tissue matter when using accessible proxies. It measures total Hg, not Hg speciation, and compares existing thresholds; our interpretation is that one species/event cannot establish universal organ-risk thresholds. The paper’s data statement points to Supporting Information; those files are outside the evidence summarized here. Published necropsy permissions belong to that study, not automatically to this doctorate; the paper does not promise student live-animal biopsy work. Age-dependent skin-to-organ study

Bibliography: Ryan McCarthy; Christoph Gade; Joanna Kershaw; Mariel T. I. ten Doeschate; Nicholas J. Davison; Andrew Brownlow; Rebecca von Hellfeld. Exploring the Use of Skin Biopsies to Infer Organ Mercury Burden in Long-Finned Pilot Whales. Marine Mammal Science 42(2):e70170 (2026). DOI: 10.1111/mms.70170. Original research NOTE.

• Derous, Davison and Brownlow, Marine Mammal Science 42: e70229, 20 July 2026, report a proteomic proof of concept in one stranded adult–juvenile pair. Liver from the adult female only and blubber layers from both individuals show biologically interpretable differences, illustrating how archived/postmortem materials can connect to pathways. Blood proteins, postmortem effects and fasting/metabolic pathology complicate interpretation; detoxification-pathway enrichment does not establish contaminant causality or population validation. The authors provide data on reasonable request, which is not guaranteed access for the new student. 2026 proteomic feasibility and limits

Bibliography: Davina Derous; Nicholas J. Davison; Andrew Brownlow. Proteomic Insights Into Liver Pathology and Stratified Blubber Biology in a Stranded Adult-Juvenile Cetacean Pair: A Proof-of-Concept Study. Marine Mammal Science 42(3):e70229 (2026). DOI: 10.1111/mms.70229. Original research NOTE.

Together these studies offer real chemical, physiological and analytical foundations, with Glasgow/stranding-network collaboration visible in the papers. They do not establish a guaranteed inventory of usable samples, new experimental animals or allocated analytical instrument time. Ask who provides daily phylogenomic and chemistry mentoring, which data/tissue agreements already exist, and what a fully computational fallback would deliver.

EASTBIO standard-project policy limits primary supervisors to three other PhD students in October 2027, requires on-campus presence, and restricts a new primary project while a current EASTBIO student remains unless submission is expected before then; CASE exceptions exist. This is a programme rule, not an independently verified count of Derous's students or a guarantee of capacity. Current supervisor eligibility policy.

Funding, Application and Living Cost

Award and international conditions

Chinese/international applicants may compete; international students are capped at 30% of annual recruitment across the entire EASTBIO network. This is not a project quota or an individual award probability. The EASTBIO FAQ states that successful international awardees receive an overseas-fee top-up waiver. Eligibility does not secure an award. Obtain the Aberdeen offer's four-year Home-fee/overseas-waiver wording and any writing-up/extension charges in writing. Visa/IHS are excluded. Current international waiver and funding FAQ.

The project Funding Notes estimate a tax-free £22,437 stipend for 2027/28; this is an estimate, not the formal annual UKRI rate. UKRI's stated minimum is £21,805 from October 2026, with 2026/27 Home-fee support £5,238. The project separately lists a research/training grant of £5,000 in each of years 1–3 and £1,500 in year 4, plus £230 per year travel/conference allowance. These support research, training and travel; they are not extra personal living stipend. Budget responsibility for optional analytical work, placement travel and any grant shortfall needs confirmation. Current UKRI benchmark.

Exact host application

EASTBIO instructions also make the anonymous Equality, Diversity & Inclusion (EDI) survey mandatory: copy its unique response ID onto the application form. The survey is open from 4 October to 17 November, but that does not extend the application and reference deadline of 16 November. References from the project supervisor(s) are not accepted. EASTBIO current application requirements

Apply to only one EASTBIO project across all hosts. Discuss the project with the lead before applying. Aberdeen requires a single email to smmsn-pgrenquiries@abdn.ac.uk by 23:59 GMT, 16 November 2026, subject “EASTBIO Application – [Your Name]”, with the completed EASTBIO form, academic certificates/transcripts and two references, one possibly non-academic. Use the official reference template; referees may send separately to the same address, subject “EASTBIO Reference – [Your Name]”, by the same deadline. The applicant must ensure receipt; the host will not chase missing items. No research proposal or extra documents such as school certificates, papers or dissertations; incomplete or unnecessary-material applications will not be considered. The central FAQ's looser late-reference possibility does not extend this exact host deadline. Non-English qualifications need original and official translation. Forms and one-project rule.

Ordinarily the supervisor nominates one candidate, followed by institutional shortlisting and a partnership interview assessing project and interdisciplinary-training fit, with a short presentation of previous research. For 2027, the published sequence is 18 January nominations, 22 February interview invitations, week beginning 8 March interviews, and week beginning 22 March decisions. This is not an invitation guarantee; not every advertised project receives an award. Selection and timeline.

Aberdeen purchasing power

The university recommends £1,171/month, aligned with UKVI budgeting, or £14,052 for 12 months. It includes accommodation and is a planning minimum, not a city mean or 2027 quotation. Do not calculate future savings from the estimated 2027 stipend and an older budget. Use the formal award and actual housing costs, including inflation, visa/IHS, relocation, deposit and individual spending; do not add rent twice. University budget basis.

Actual 2026/27 examples are Adam Smith House £111/week, and Elphinstone Road £133 shared/£191 ensuite, with 40–50 week contracts and Wi-Fi included. Fifty weeks would be £5,550, £6,650 or £9,550 respectively, leaving two weeks to arrange; 40-week prices cannot automatically be extended. Check postgraduate allocation, utility inclusions, deposit and 2027 availability before choosing accommodation. Current university housing prices.

Applicant Fit and Preparation

The project requires a relevant UK 2:1 or international equivalent; a 2:2 may be considered with a Master's Distinction or Commendation, including an expected result. A Master's is not universally mandatory. Officially, the project suits computational/quantitative environmental biology across biology, chemistry and ecology; prior mastery of every genomics or metallomics technique is not listed as a prerequisite.

For Biological Sciences, Aberdeen's Postgraduate Standard English is IELTS 6.5 overall, Writing 6.0, Reading/Listening/Speaking 5.5, normally with qualifying test certification within two years. This differs from the medical-school Higher reading threshold despite the shared application inbox. Valid One Skill Retake is accepted; confirm individual 2027 offer/waiver conditions. EASTBIO allows application before holding an English test, with proof potentially required before a formal offer. Correct school English policy.

Useful preparation is a reproducible evidence-synthesis or comparative-data example showing unit harmonisation, age/tissue/species confounding, missingness and uncertainty. For genomics, explain orthology/phylogenetic bias and annotation limits; for networks, distinguish predictions from measured physiology. These are analyst suggestions, not extra submission documents. Interest in marine mammals alone, without willingness to analyse heterogeneous data and learn quantitative methods, would be a mismatch. Chemistry-only applicants should clarify the balance between computational core and optional tissue analysis.

Career and Transferable Skills

Its skills connect to conservation research, environmental toxicology, scientific data analysis and consultancy/regulatory evidence work. BTS describes academic toxicology careers involving postdoctoral research, teaching and grant activity alongside government/industry collaboration; this is professional context, not supervisor-specific placement data or an automatic regulated qualification. Professional career context.

Next Actions and Questions to Verify

Before Applying

Contact Derous and verify data access, species/age metadata, scope and the supervisor roster including Jörg Feldmann. Confirm Chinese degree equivalence and the complete international fee waiver. Choose this against other EASTBIO titles before using the one-project application; arrange both template references and translated qualifications for 16 November 23:59 GMT. Do not submit a research proposal or unsolicited portfolio files.

At Interview

Ask what data are already approved for use, which archived tissues actually exist, and whether the thesis can succeed without new samples or optional chemistry. Discuss stranding/survival bias, Hg speciation versus total burden, phylogenetic comparisons and which physiological outcome can be supported. Confirm tissue permissions/material-transfer agreements, instrument and bioinformatics support, supervisor roles, current capacity and a first-year publishable baseline. Ask how PIPS and cohort training fit the research schedule.

Before Accepting

Obtain four-year full tuition/waiver and final stipend terms, RTSG/travel access, optional analytical costs, interruption/extension conditions and final registration title. Check full-year accommodation and initial visa/IHS cash. Usable data/tissue access and mentoring support remain the main feasibility questions; permissions for new animal experiments are not established.

Evidence and Sources

Paper assessments retain the limits stated in their sections; the McCarthy paper’s Supporting Information was not examined and no raw data were reanalysed. The FAQ and English requirements should be checked against current official guidance. Current vacancy status and individual eligibility have not been confirmed.

Recruitment, school and training

• EASTBIO 2027 How to Apply and officially designated directory
• EASTBIO current applicant FAQ
• EASTBIO selection process 2027
• EASTBIO training overview
• EASTBIO PIPS guidance
• EASTBIO 2027 supervisor eligibility and timeline
• Aberdeen Biological and Environmental Sciences PhD programme
• Aberdeen REF 2021 official results
• Aberdeen current postgraduate English requirements

Supervisors and recent primary research

• Davina Derous current institutional profile
• Marius Wenzel current staff profile
• Rebecca von Hellfeld current institutional profile
• von Hellfeld et al 2024 HgSe microparticles primary paper
• McCarthy et al 2026 skin-to-organ mercury primary paper
• Derous Davison Brownlow 2026 cetacean proteomic proof-of-concept

Funding, cost and career context

• Aberdeen 2026/27 accommodation costs
• Aberdeen international living-cost guidance
• UKRI current minimum support
• British Toxicology Society academic careers
• British Toxicology Society ecotoxicology 2026 overview
• Jörg Feldmann current Graz institutional role