Now showing items 1-20 of 23

  • An alternative method for correcting fluorescence quenching 

    Biermann, Lauren; Guinet, Christophe; Bester, Marthan; Brierley, Andrew Stuart; Boehme, Lars (2015-01-13) - Journal article
    Under high light intensity, phytoplankton protect their photosystems from bleaching through non-photochemical quenching processes. The consequence of this is suppression of fluorescence emission, which must be corrected ...
  • Between the devil and the deep blue sea : the role of the Amundsen Sea continental shelf in exchanges between ocean and ice shelves 

    Heywood, Karen; Biddle, Louise; Boehme, Lars; Dutrieux, Pierre; Fedak, Michael Andre; Jenkins, Adrian; Jones, Richard W.; Kaiser, Jan; Mallett, Helen; Naveira Garabato, Alberto C.; Renfrew, Ian A.; Stevens, David P.; Webber, Benjamin G.M. (2016-12) - Journal article
    The Amundsen Sea is a key region of Antarctica where ocean, atmosphere, sea ice and ice sheet interact. For much of Antarctica, the relatively warm ocean water in the open Southern Ocean (a few degrees above freezing) is ...
  • Bimodal winter haul-out patterns of adult Weddell seals (Leptonychotes weddellii) in the southern Weddell Sea 

    Boehme, Lars; Baker, Amy; Fedak, Mike; Årthun, Marius; Nicholls, Keith; Robinson, Patrick; Costa, Dan; Biuw, Martin; Photopoulou, Theoni (2016-05-19) - Journal article
    Hauling out is an essential component of pinniped life-history. Haul-out behaviour may be affected by biological (e.g. sex, age and condition) and physical factors (e.g. food availability and environmental conditions), and ...
  • Circumpolar habitat use in the southern elephant seal: implications for foraging success and population trajectories 

    Hindell, Mark A.; McMahon, Clive R.; Bester, Marthán N.; Boehme, Lars; Costa, Daniel; Fedak, Mike; Guinet, Christophe; Herraiz-Borreguero, Laura; Harcourt, Robert G.; Huckstadt, Luis; Kovacs, Kit M.; Lydersen, Christian; McInytre, Trevor; Muelbert, Monica; Roquet, Fabien; Williams, Guy; Charrassin, Jean-Benoit (2016-05-26) - Journal article
    In the Southern Ocean, wide-ranging predators offer the opportunity to quantify how animals respond to differences in the environment because their behavior and population trends are an integrated signal of prevailing ...
  • A comparison of gridded sea surface temperature datasets for marine ecosystem studies 

    Boehme, Lars; Lonergan, Mike; Todd, Christopher David (2014-12-03) - Journal article
    In assessing impacts of a changing environment on the structure and functioning of marine ecosystems, the challenge remains to distinguish the effects of noise and of temporal and spatial autocorrelation from environmental ...
  • Control of mode and intermediate water mass properties in Drake Passage by the Amundsen Sea low 

    Close, Sally; Naveira Garabato, Alberto; McDonagh, Elaine; King, Brian; Biuw, Martin; Boehme, Lars (2013-07) - Journal article
    The evolution of the physical properties of Subantarctic Mode Water (SAMW) and Antarctic Intermediate Water (AAIW) in the Drake Passage region are examined on time scales down to intraseasonal, within the 1969 - 2009 period. ...
  • Drift diving by hooded seals (Cystophora cristata) in the Northwest Atlantic Ocean 

    Andersen, Julie; Stenson, Garry; Skern-Maurizen, Mette; Wiersma, Yolanda; Rosing-Asvid, Aqqalu; Boehme, Lars; Hammill, Mike (2014-07-22) - Journal article
    Many pinniped species perform a specific dive type, referred to as a ‘drift dive’, where they drift passively through the water column. This dive type has been suggested to function as a resting/sleeping or food processing ...
  • Estimates of the Southern Ocean general circulation improved by animal-borne instruments 

    Roquet, F; Wunsch, C; Forget, G; Heimbach, P; Guinet, C; Reverdin, G; Charrassin, J-B; Bailleul, F; Costa, D P; Huckstadt, L A; Goetz, K T; Kovacs, K M; Lydersen, C; Biuw, M; Nøst, O A; Bornemann, H; Ploetz, J; Bester, M N; McIntyre, T; Muelbert, M C; Hindell, M; McMahon, C R; Williams, G; Harcourt, R; Field, I; Chafik, L; Nicholls, K W; Boehme, Lars; Fedak, Mike (2013-12) - Journal article
    Over the last decade, several hundred seals have been equipped with conductivity-temperature-depth (CTD) sensors in the Southern Ocean for both biological and physical oceanographic studies. A calibrated collection of ...
  • Fishing for drifts : detecting buoyancy changes of a top marine predator using a step-wise filtering method 

    Gordine, Samantha Alex; Fedak, Mike; Boehme, Lars (2015-12-02) - Journal article
    In southern elephant seals (Mirounga leonina), fasting and foraging related fluctuations in body composition are reflected by buoyancy changes which can be monitored by changes in drift rate. Here, we present an improved ...
  • The frontal system of the Antarctic Circumpolar Current : marine mammals as ocean explorers 

    Boehme, Lars (University of St Andrews, 2008-11-27) - Thesis
    In this thesis, I describe large-scale and small-scale features of the Antarctic Circumpolar Current (ACC) by merging conductivity-temperature-depth (CTD) data obtained by novel animal-borne sensors with data obtained by ...
  • How many seals were there? The global shelf loss during the Last Glacial Maximum and its effect on the size and distribution of grey seal populations 

    Boehme, Lars; Thompson, David; Fedak, Mike; Bowen, Don; Hammill, Mike; Stenson, Gary (2012-12-26) - Journal article
    Predicting how marine mammal populations act to habitat changes will be essential for developing conservation management strategies by marine mammal ecologists in the 21st century. Responses to previous environmental change ...
  • In-situ observations using tagged animals 

    Roquet, Fabien; Boehme, Lars; Bester, Marthan; Bornemann, Horst; Brasseur, Sophie; Charrassin, Jean-Benoit; Costa, Daniel; Fedak, Michael Andre; Guinet, Christophe; Hall, Ailsa Jane; Harcourt, Robert; Hindell, Mark; Kovacs, Kit M.; Lea, Mary-Anne; Lovell, Philip; Lowther, Andrew; Lydersen, Christian; McMahon, Clive; Picard, Baptiste; Reverdin, Gilles; Vincent, Cécile (2017-02-21) - Conference paper
    Marine mammals help gather information on some of the harshest environments on the planet, through the use of miniaturized ocean sensors glued on their fur. Since 2004, hundreds of diving marine animals, mainly Antarctic ...
  • Investigating annual diving behaviour by Hooded seals (Cystophora cristata) within the Northwest Atlantic Ocean 

    Andersen, Julie Marie; Skern-Mauritzen, Mette; Boehme, Lars; Wiersma, Yolanda F.; Rosvig-Asvid, Aqqalu; Hammill, Mike; Stenson, Garry (2013-11-25) - Journal article
    With the exception of relatively brief periods when they reproduce and moult, hooded seals, Cystophora cristata, spend most of the year in the open ocean where they undergo feeding migrations to either recover or prepare ...
  • Marine mammals exploring the oceans pole to pole : a review of the MEOP consortium 

    Treasure, Anne; Roquet, Fabien; Ansorge, Isabelle J.; Bester, Marthán N.; Boehme, Lars; Bornemann, Horst; Charrassin, Jean-Benoit; Chevallier, Damien; Costa, Daniel P.; Fedak, Michael Andre; Guinet, Christophe; Hammill, Mike O.; Harcourt, Robert G.; Hindell, Mark A.; Kovacs, Kit M.; Lea, Mary-Anne; Lovell, Philip; Lowther, Andrew D.; Lydersen, Christian; McIntyre, Trevor; McMahon, Clive R.; Muelbert, Mônica M.C.; Nicholls, Keith; Picard, Baptiste; Reverdin, Gilles; Trites, Andrew W.; Williams, Guy D.; de Bruyn, P.J. Nico (2017-06) - Journal item
    Polar oceans are poorly monitored despite the important role they play in regulating the Earth’s climate system. Marine mammals equipped with biologging devices are now being used to fill the data gaps in these logistically ...
  • Ocean observations using tagged animals 

    Roquet, Fabien; Boehme, Lars; Block, Barbara; Charrasin, Jean Benoit; Costa, Daniel; Guinet, Christophe; Harcourt, Robert G.; Hindell, Mark A.; Hückstädt, Luis A.; McMahon, Clive R.; Woodward, Bill; Fedak, Michael Andre (2017-06) - Journal article
    “Biologging” through temporary attachment of miniaturized data loggers on marine animals is revolutionizing the science of marine ecology (Block et al., 2011; Hussey et al., 2015). It also offers new capabilities to observe ...
  • Seasonal inflow of warm water onto the southern Weddell Sea continental shelf, Antarctica 

    Arthun, Marius; Nicholls, Keith; Makinson, Keith; Fedak, Mike; Boehme, Lars (2012-09-01) - Journal article
    To capture the austral summer to winter transition in water mass properties over the southern Weddell Sea continental shelf and slope region Weddell seals were tagged with miniaturized conductivity–temperature–depth sensors ...
  • Seasonal variability of the warm Atlantic water layer in the vicinity of the Greenland shelf break 

    Grist, Jeremy P.; Josey, Simon A.; Boehme, Lars; Meredith, Michael P.; Laidre, Kristin; Heide-Jorgensen, Mads Peter; Kovacs, Kit; Lydersen, Christian; Davidson, Fraser; Stenson, Garry; Hammill, Mike; Marsh, Robert; Coward, Andrew (2014-12-16) - Journal article
    The warmest water reaching the east and west coast of Greenland is found between 200 m and 600 m. Whilst important for melting Greenland's outlet glaciers, limited winter observations of this layer prohibit determination ...
  • Sex-related differences in the postmolt distribution of Weddell seals (Leptonychotes weddellii) in the southern Weddell Sea 

    Langley, Izzy; Fedak, Mike; Nicholls, Keith; Boehme, Lars (2018-04) - Journal article
    The population of Weddell seals (Leptonychotes weddellii) in the southern Weddell Sea is in a unique position on the continental shelf edge, with vast shelf waters to the south, and deep Southern Ocean to the north. We ...
  • A Southern Indian Ocean database of hydrographic profiles obtained with instrumented elephant seals 

    Roquet, Fabien; Williams, Guy; Hindell, Mark A.; Harcourt, Rob; McMahon, Clive; Guinet, Christophe; Charrassin, Jean-Benoit; Reverdin, Gilles; Boehme, Lars; Lovell, Philip; Fedak, Mike (2014-09-02) - Journal article
    The instrumentation of southern elephant seals with satellite-linked CTD tags has offered unique temporal and spatial coverage of the Southern Indian Ocean since 2004. This includes extensive data from the Antarctic ...
  • Technical Note: Animal-borne CTD-Satellite Relay Data Loggers for real-time oceanographic data collection 

    Boehme, Lars; Lovell, Philip; Biuw, Martin; Roquet, F.; Nicholson, J.; Thorpe, S. E.; Meredith, M. P.; Fedak, Mike (2009-12-15) - Journal article
    The increasing need for continuous monitoring of the world oceans has stimulated the development of a range of autonomous sampling platforms. One novel addition to these approaches is a small, relatively inexpensive ...