Dr Sascha Hooker


tel: 01334 467201
fax: 01334 463443
email: sh43@st-andrews.ac.uk
room: 1.10  (SOI)
Scottish Oceans Institute
East Sands
University of St Andrews
St Andrews
KY16 8LB

General Information

My research concerns specifically the foraging and diving behaviour of marine predators and more generally how this can inform conservation planning in the ocean.

Current Projects

Marine predator foraging ecology

Work on predator foraging often relies on inference from dive profiles. Using a miniature video camera attached to the animal we can view the foraging space of a diving animal and test previously used proxies for foraging behaviour. The identification of foraging areas and assessment of the stability of these over time and space enable us to investigate variability in foraging success and the criteria driving this (whether anthropogenically or environmentally induced).

Diving physiology

The mechanisms allowing marine mammals to avoid problems associated with diving to depth are still only partially understood. Recent deaths of beaked whales associated with sonar exposure appear to be due to decompression sickness. I am interested in how problems such as shallow-water blackout and decompression sickness are avoided, and use modelling approaches to determine risk based on dive profiles.

Conservation planning and marine protected areas

An ecosystem-approach is widely advocated in conservation planning but ecosystem modelling approaches, despite their sophistication, often suffer from a lack of source data or inherent uncertainties. An alternative is to use spatially explicit management. I am interested in the application of such marine reserve areas to higher predators.


Recent Publications

Hammond, PS, Heinrich, S, Hooker, SK & Tyack, PL 2017, Whales: Their past, present and future. Natural History Museum, London.
Hooker, SK, Simmons, SE, Stimpert, AK & McDonald, BI 2017, 'Equity and career-life balance in marine mammal science?' Marine Mammal Science, vol Early View. DOI: 10.1111/mms.12407
Hooker, SK 2017, Toothed whales. in Encyclopedia of marine mammals. 3rd edn, Elsevier.
Hooker, SK D. Decompression stress: CMS Family Environmental Impact Assessment Guidelines for Marine Noise-generating Activities.
Aguilar De Soto, N, Gkikopoulou, K, Hooker, S, Isojunno, S, Johnson, M, Miller, P, Tyack, P, Wensveen, P, Donovan, C, Harris, CM, Harris, D, Marshall, L, Oedekoven, C, Prieto, R & Thomas, L 2016, 'From physiology to policy: a review of physiological noise effects on marine fauna with implications for mitigation' Proceedings of Meetings on Acoustics, vol 27, no. 1, 040008. DOI: 10.1121/2.0000299
Hooker, SK, Barychka, T, Jessopp, MJ & Staniland, IJ 2015, 'Images as proximity sensors: the incidence of conspecific foraging in Antarctic fur seals' Animal Biotelemetry, vol 3, 37. DOI: 10.1186/s40317-015-0083-2
Miller, P, Kvadsheim, PH, Lam, FPA, Tyack, PL, Curé, C, De Ruiter, SL, Kleivane, L, Sivle, LD, van IJsselmuide, SP, Visser, F, Wensveen, PJ, von Benda-Beckmann, AM, Martin Lopez, LM, Narazaki, T & Hooker, SK 2015, 'First indications that northern bottlenose whales are sensitive to behavioural disturbance from anthropogenic noise' Royal Society Open Science, vol 2, 140484. DOI: 10.1098/rsos.140484
Hooker, SK 2015, Marine mammals: sperm whales and beaked whales. in Reference Module in Earth Systems and Environmental Sciences. Elsevier. DOI: 10.1016/B978-0-12-409548-9.09499-9
Williams, R, Grand, J, Hooker, SK, Buckland, ST, Reeves, RR, Rojas-Bracho, L, Sandilands, D & Kaschner, K 2014, 'Prioritizing global marine mammal habitats using density maps in place of range maps' Ecography, vol 37, no. 3, pp. 212-220. DOI: 10.1111/j.1600-0587.2013.00479.x
New, LF, Moretti, D, Hooker, SK, Costa, DP & Simmons, SE 2013, 'Using energetic models to investigate the survival and reproduction of beaked whales (family Ziphiidae)' PLoS One, vol 8, no. 7, e68725. DOI: 10.1371/journal.pone.0068725
Hooker, SK, Fahlman, A, Moore, MJ, Aguilar de Soto, N, Bernaldo de Quiros, Y, Brubakk, AO, Costa, DP, Costidis, AM, Dennison, S, Falke, KJ, Fernandez, A, Ferrigno, M, Fitz-Clarke, JR, Garner, MM, Houser, DS, Jepson, PD, Ketten, DR, Kvadsheim, PH, Madsen, PT, Pollock, NW, Rotstein, DS, Rowles, TK, Simmons, SE, Van Bonn, W, Weathersby, PK, Weise, MJ, Williams, TM & Tyack, PL 2012, 'Deadly diving? Physiological and behavioural management of decompression stress in diving mammals' Proceedings of the Royal Society B: Biological Sciences, vol 279, no. 1731, pp. 1041-1050. DOI: 10.1098/rspb.2011.2088
Whitehead, H & Hooker, SK 2012, 'Uncertain status of the northern bottlenose whale Hyperoodon ampullatus: population fragmentation, legacy of whaling and current threats' Endangered Species Research, vol 19, pp. 47-61. DOI: 10.3354/esr00458
Hooker, SK, Canadas, AM, Hyrenbach, KD, Corrigan, C, Polovina, JJ & Reeves, RR 2011, 'Making protected area networks effective for marine top predators.' Endangered Species Research, vol 13, no. 3, pp. 203-218. DOI: 10.3354/esr00322
Bearhop, S, Bearzi, G, Block, B, Bograd, S, Cooke, SJ, Costa, D, Godfrey, MH, Godley, BJ, Hamner, C, Hodgson, D, Hooker, SK, Matthiopoulos, J, C., M, Seminoff, JA & Wilson, R (eds) 2010, 'Biologging technologies: new tools for conservation' Endangered Species Research, vol 10, no. 1-3.
McConnell, BJ, Fedak, MA, Hooker, SK & Patterson, T 2010, Telemetry. in IL Boyd, WD Bowen & SJ Iverson (eds), Marine Mammal Ecology and Conservation: A handbook of Techniques. Oxford University Press, New York, pp. 222-241.
Hooker, SK, Baird, RW & Fahlman, A 2009, 'Could beaked whales get the bends? Effect of diving behaviour and physiology on modelled gas exchange for three species: Ziphius cavirostris, Mesoplodon densirostris and Hyperoodon ampullatus' Respiratory Physiology & Neurobiology, vol 167, no. 3, pp. 235-246. DOI: 10.1016/j.resp.2009.04.023
Fahlman, A, Hooker, SK, Olszowka, A, Bostrom, BL & Jones, DR 2009, 'Estimating the effect of lung collapse and pulmonary shunt on gas exchange during breath-hold diving: The Scholander and Kooyman legacy' Respiratory Physiology & Neurobiology, vol 165, pp. 28-39. DOI: doi:10.1016/j.resp.2008.09.013
Fuller, WJ, Broderick, AC, Hooker, SK, Witt, MJ & Godley, BJ 2009, 'Insights into habitat utilization by green turtles (Chelonia mydas) during the inter-nesting period using animal-borne digital cameras' Marine Technology Society Journal, vol 43, no. 3, pp. 51-59.
Heaslip, SG & Hooker, SK 2008, 'Effect of animal-borne camera and flash on the diving behaviour of the female Antarctic fur seal (Arctocephalus gazella)' Deep Sea Research Part I: Oceanographic Research Papers, vol 55, no. 9, pp. 1179-1192. DOI: 10.1016/j.dsr.2008.05.006
Hooker, SK, Metcalfe, TL, Metcalfe, CD, Angell, CM, Wilson, JY, Moore, MJ & Whitehead, H 2008, 'Changes in persistent contaminant concentration and CYP1A1 protein expression in biopsy samples from northern bottlenose whales, Hyperoodon ampullatus, following the onset of nearby oil and gas development' Environmental Pollution, vol 152, no. 1, pp. 205-216. DOI: 10.1016/j.envpol.2007.05.027
Hooker, SK, Heaslip, SG, Matthiopoulos, J, Cox, O & Boyd, IL 2008, 'Data sampling options for animal-borne video cameras: Considerations based on deployments with Antarctic fur seals' Marine Technology Society Journal, vol 42, pp. 65-75.
Compton, R, Banks, A, Goodwin, L & Hooker, SK 2007, 'Pilot cetacean survey of the Sub-Arctic North Atlantic utilising a cruise-ship platform.' Journal of the Marine Biological Association of the United Kingdom, vol 87, pp. 321-325. DOI: 10.1017/S0025315407054781
Hooker, SK, Biuw, M, McConnell, BJ, Miller, P & Sparling, CE 2007, 'Bio-logging science: logging and relaying physical and biological data using animal-attached tags.' Deep Sea Research Part II: Topical Studies in Oceanography, vol 54, pp. 177-182. DOI: 10.1016/j.dsr2.2007.01.001
Woodside, JM, David, L, Frantzis, A & Hooker, SK 2006, 'Gouge marks on deep-sea mud volcanoes in the eastern Mediterranean: caused by Cuvier's beaked whales?' Deep Sea Research Part I: Oceanographic Research Papers, vol 53, no. 11, pp. 1762-1771. DOI: 10.1016/j.dsr.2006.08.011
Hooker, SK, Miller, P, Johnson, MP, Cox, OP & Boyd, IL 2005, 'Ascent exhalations of Antarctic fur seals: a behavioural adaptation for breath-hold diving?' Proceedings of the Royal Society of London Series B: Biological Sciences, vol 272, no. 1561, pp. 355-363. DOI: 10.1098/rspb.2004.2964
Hooker, SK & Gerber, LR 2004, 'Marine reserves as a tool for ecosystem-based management: the potential inportance of megafauna.' Bioscience, vol 54, no. 1, pp. 27-39. DOI: 10.1641/0006-3568(2004)054[0027:MRAATF]2.0.CO;2
Hooker, SK & Boyd, IL 2003, 'Salinity sensors on seals: using marine predators to carry CTD dataloggers.' Deep Sea Research Part I: Oceanographic Research Papers, vol 50, pp. 927. DOI: 10.1016/S0967-0637(03)00055-4
Hooker, SK 2003, 'Marine mammal biology: an evolutionary approach' Journal of Experimental Marine Biology and Ecology, vol 283, pp. 145-146.
Berrow, SD, McHugh, B, Glynn, D, McGovern, E, Parsons, KM, Baird, RW & Hooker, SK 2002, 'Organochlorine concentrations in resident bottlenose dolphins (Tursiops truncatus) in the Shannon estuary, Ireland' Marine Pollution Bulletin, vol 44, pp. 1296-1303. DOI: 10.1016/S0025-326X(02)00215-1
Hooker, SK, Boyd, IL, Jessop, M, Cox, O, Blackwell, J, Boveng, PL & Bengtson, JL 2002, 'Monitoring the prey-field of marine predators: combining digital imaging with datalogging tags.' Marine Mammal Science, vol 18, no. 3, pp. 680-697. DOI: 10.1111/j.1748-7692.2002.tb01066.x
Hooker, SK, Whitehead, H & Gowans, S 2002, 'Ecosystem consideration in conservation planning: energy demand of foraging bottlenose whales (Hyperoodon ampullatus) in a marine protected area' Biological Conservation, vol 104, no. 1, pp. 51-58. DOI: 10.1016/S0006-3207(01)00153-7
Hooker, SK & Whitehead, H 2002, 'Click characteristics of northern bottlenose whales (Hyperoodon ampullatus).' Marine Mammal Science, vol 18, pp. 69-80. DOI: 10.1111/j.1748-7692.2002.tb01019.x
Hooker, SK, Whitehead, H, Gowans, S & Baird, RW 2002, 'Fluctuations in distribution and patterns of individual range use of northern bottlenose whales.' Marine Ecology Progress Series, vol 225, pp. 287-297.
Hooker, SK, Perrin, WF (ed.), Wursig, B (ed.) & Thewissen, HGM (ed.) Toothed whales, overview. Pages 1252 - 1260..
Hooker, SK, Iverson, SJ, Ostrom, P & Smith, SC 2001, 'Diet of northern bottlenose whales inferred from fatty-acid and stable-isotope analyses of biopsy samples.' Canadian Journal of Zoology, vol 79, no. 8, pp. 1442-1454.. DOI: 10.1139/cjz-79-8-1442
Gowans, S, Whitehead, H & Hooker, SK 2001, 'Social organization in northern bottlenose whales (Hyperoodon ampullatus): not driven by deep water foraging?' Animal Behaviour, vol 62, pp. 369-377.. DOI: 10.1006/anbe.2001.1756
Baird, RW, Ligon, AD, Hooker, SK & Gorgone, AM 2001, 'Sub-surface and night-time behaviour of pantropical spotted dolphins in Hawaii' Canadian Journal of Zoology, vol 79, pp. 988-996. DOI: 10.1139/cjz-79-6-988
Hooker, SK, Baird, RW, Al-Omari, S, Gowans, S & Whitehead, H 2001, 'Behavioral reactions of northern bottlenose whales to biopsy darting and tag attachment procedures.' Fishery Bulletin, vol 99, no. 2, pp. 303-308..
Hooker, SK & Baird, RW 2001, 'Diving and ranging behaviour of odontocetes: a methodological review and critique.' Mammal Review, vol 31, no. 1, pp. 81-105. DOI: 10.1046/j.1365-2907.2001.00080.x
Dalebout, ML, Hooker, SK & Christensen, I 2001, 'Genetic diversity and population structure among northern bottlenose whales, Hyperoodon ampullatus, in the western North Atlantic Ocean.' Canadian Journal of Zoology, vol 79, no. 3, pp. 478-484.. DOI: 10.1139/cjz-79-3-478
Hooker, SK Marine mammals: Sperm whales and beaked whales..
Baird, RW & Hooker, SK 2000, 'Ingestion of plastic and unusual prey by a juvenile harbour porpoise' Marine Pollution Bulletin, vol 40, no. 8, pp. 719-720.
Gowans, S, Dalebout, ML, Hooker, SK & Whitehead, H 2000, 'Reliability of photographic and molecular techniques for sexing northern bottlenose whales (Hyperoodon ampullatus)' Canadian Journal of Zoology, vol 78, no. 7, pp. 1224-1229.
Lucas, ZN & Hooker, SK 2000, 'Cetacean strandings on Sable Island, Nova Scotia, 1970-1998' Canadian Field-Naturalist, vol 114, no. 1, pp. 45-61.
Hooker, SK, Whitehead, H & Gowans, S 1999, 'Marine protected area design and the spatial and temporal distribution of cetaceans in a submarine canyon' Conservation Biology, vol 13, no. 3, pp. 592-602.
Hooker, SK & Baird, RW 1999, 'Deep-diving behaviour of the northern bottlenose whale, Hyperoodon ampullatus (Cetacea : Ziphiidae)' Proceedings of the Royal Society B: Biological Sciences, vol 266, no. 1420, pp. 671-676.
Hooker, SK & Baird, RW 1999, 'Observations of Sowerby's Beaked Whales, Mesoplodon bidens, in the Gully, Nova Scotia' Canadian Field-Naturalist, vol 113, no. 2, pp. 273-277.
Hooker, SK 1998, 'Extensive scarring observed on female or juvenile male sperm whales off the Galapagos Islands' Mammalia, vol 62, no. 1, pp. 134-139.

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