Mr Callan Duck

Mr Callan Duck
Senior Research Scientist

My main function at SMRU is to monitor the size and status of the UK seal populations. Almost all of the surveying I undertake is in Scotland, with Chris Morris. Dave Thompson usually looks after harbour seals in east England. We survey harbour seals during their June and July breeding season in limited local areas. Our main surveys are during their annual moult, in August, when we obtain an index of the size of populations in different parts of Scotland. We survey grey seals during their breeding season, between mid September and the end of November/early December. We use light aircraft and small helicopters for our aerial surveys.

source: symbiosis

Research Overview:


Recent publications

20  (of 44 published available) for cdd1. (source: University of St Andrews PURE)
Please click title of any item for full details.


(Other report)
Harbour Seal Decline – vital rates and drivers.
Monica Arso Civil, Sophie Caroline Smout, David Thompson, Andrew Brownlow, Nicolas Davison, Mariel Doeschate, Callan David Duck, Chris Morris, Caroline Cummings, Bernie J McConnell, Ailsa Jane Hall 
Keywords: Scottish Government
2017 (17/2)
Aquatic Conservation: Marine and Freshwater Ecosystems
vol.27 pp.268-281
2016 (6)

(Commissioned report)
Harbour Seal Decline - vital rates and drivers
Monica Arso Civil, Sophie Caroline Smout, Callan David Duck, Chris Morris, Joseph Onoufriou, David Thompson, Andrew Brownlow, Nicholas Davison, Caroline Cummings, Patrick Pomeroy, Bernie J McConnell, Ailsa Jane Hall 
Keywords: Harbour seal, Population Dynamics, Population decline, Bayesian approach, Photo-identification, TelemetryGE Environmental Sciences, QA Mathematics, QH301 BiologyScottish Government

(Other report)
Independent estimates of grey seal population size: 2008 and 2014
Debbie JF Russell, Callan David Duck, Chris Morris, David Thompson 
Keywords: SCOS
2016 (14/7)
vol.535 pp.241-245
Phenological sensitivity to climate across taxa and trophic levels
Stephen J. Thackeray, Peter A. Henrys, Deborah Hemming, James R. Bell, Marc S. Botham, Sarah Burthe, Pierre Helaouet, David G. Johns, Ian D Jones, David. I. Leech, Eleanor B. Mackay, Dario Massimino, Sian Atkinson, Philip J. Bacon, Tom M. Brereton, Laurence Carvalho, Tim H. Clutton-Brock, Callan David Duck, Martin Edwards, J. Malcolm Elliott, Stephen J. G. Hall, Richard Harrington, James W. Pearce-Higgins, Toke T. Høye, Loeske E. B. Kruuk, Josephine M. Pemberton, Tim H. Sparks, Paul M. Thompson, Ian White, Ian J. Winfield, Sarah Wanless 
Keywords: Phenology, Food webs QH301 BiologyNDAS
2015 (27/8)
Marine Ecology Progress Series
vol.534 pp.235-249
Patterns of space use in sympatric marine colonial predators reveals scales of spatial partitioning
Esther Lane Jones, Bernie J McConnell, Sophie Caroline Smout, Philip Steven Hammond, Callan David Duck, Christopher Morris, David Thompson, Debbie JF Russell, cecile vincent, michelle cronin, Ruth Jemma Sharples, jason matthiopoulos 
Keywords: Halichoerus grypus, Phoca vitulina, Density estimation, Propagating uncertainty, Species distribution, Telemetry, Area-based conservationQL Zoology, QH301 Biology

(Other report)
Review of parameters of grey seal pup production model
Debbie JF Russell, Callan David Duck, Chris Morris, David Thompson 
Keywords: SCOS
2014 (9)
ICES Journal of Marine Science
vol.71 pp.1913-1920
ICES Journal of Marine Science
vol.71 pp.1913-1920
2013 (27/11)
PLoS One
2013 (1/1)
Aquatic Conservation: Marine and Freshwater Ecosystems
vol.23 pp.135-144
2013 (1)
Journal of Applied Ecology
vol.50 pp.499-509

(Other report)
Marine distribution of grey & harbour seals around the UK.
Esther Lane Jones, Bernie J McConnell, Callan David Duck, Chris Morris, Philip Steven Hammond, Debbie JF Russell 
2012 (4)
Global Change Biology
vol.18 pp.1270-1281
Region-wide changes in marine ecosystem dynamics: state-space models to distinguish trends from step changes
Matthew Spencer, Nova Mieszkowska, Leonie A. Robinson, Stephen D. Simpson, Michael T. Burrows, Silvana N. R. Birchenough, Eva Capasso, Polly Cleall-Harding, Julia Crummy, Callan David Duck, Damien Eloire, Matthew Frost, Ailsa Jane Hall, Stephen J. Hawkins, David G. Johns, David W. Sims, Timothy J. Smyth, Chris L. J. Frid 
Journal of Marine Biology

2011 (11)
ICES Journal of Marine Science
vol.68 pp.2201-2209
British grey seal (Halichoerus grypus) abundance in 2008
Mike Lonergan, Callan David Duck, David Thompson, Simon Moss, Bernie J McConnell 
Keywords: ARGOS, haulout, phocid, pinniped, population estimate, SDRL, POPULATION GROWTH, HARBOR SEALS, SABLE ISLAND
2011 (8)
Animal Conservation
vol.14 pp.430-438
Long-term patterns in harbour seal site-use and the consequences for managing protected areas
L. S. Cordes, Callan David Duck, B. L. Mackey, Ailsa Jane Hall, P. M. Thompson 

(Other report)
SMRU seal telemetry data holdings
Debbie JF Russell, Esther Lane Jones, Jason Matthiopoulos, Callan David Duck, Chris Morris, Bernie J McConnell 
2011 (4)
Marine Ecology
vol.32 pp.10-24
Temporal change in UK marine communities
M. Spencer, S. N. R. Birchenough, N. Mieszkowska, L. A. Robinson, S. D. Simpson, M. T. Burrows, E. Capasso, P. Cleall-Harding, J. Crummy, Callan David Duck, D. Eloire, M. Frost, Ailsa Jane Hall, S. J. Hawkins, D. G. Johns, D. W. Sims, T. J. Smyth, C. L. J. Frid 
Keywords: Abundance, population trends, principal components, regime shift detection, regime shifts, time series, UK marine ecosystems, LONG-TERM CHANGES, WESTERN ENGLISH-CHANNEL, NORTH-SEA, CLIMATE-CHANGE, ECOSYSTEM, NORTHUMBERLAND, VARIABILITY, RESILIENCE, ATLANTIC, EUTROPHICATION

Contact Details:

Mr Callan Duck
Scottish Oceans Institute
East Sands
University of St Andrews
St Andrews
KY16 8LB

tel: 01334 462636
fax: 01334 463443
room: SMRU 1.11



Sea Mammal Research Unit
School of Biology
Centre for Biological Diversity
Scottish Oceans Institute

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