Now showing items 1-18 of 18

    • Activity seascapes highlight central place foraging strategies in marine predators that never stop swimming 

      Papastamatiou, Yannis; Watanabe, Yuuki; Demsar, Urska; Leos-Barajas, Vianey; Bradley, Darcy; Langrock, Roland; Weng, Kevin; Lowe, Christopher; Friedlander, Alan; Caselle, Jennifer (2018-06-21) - Journal article
      Background:  Central place foragers (CPF) rest within a central place, and theory predicts that distance of patches from this central place sets the outer limits of the foraging arena. Many marine ectothermic predators ...
    • Combining individual animal movement and ancillary biotelemetry data to investigate population-level activity budgets 

      McClintock, Brett Thomas; Russell, Deborah Jill Fraser; Matthiopoulos, Jason; King, Ruth (2013-04-01) - Journal article
      Recent technological advances have permitted the collection of detailed animal location and ancillary biotelemetry data that facilitate inference about animal movement and associated behaviors. However, these rich sources ...
    • Drag of suction cup tags on swimming animals : modeling and measurement 

      Shorter, K. Alex; Murray, Mark M.; Johnson, Mark; Moore, Michael; Howle, Laurens E. (2014-04) - Journal article
      Bio-logging tags are widely used to study the behavior and movements of marine mammals with the tacit assumption of little impact to the animal. However, tags on fast-swimming animals generate substantial hydrodynamic ...
    • 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 ...
    • A general discrete-time modeling framework for animal movement using multistate random walks 

      McClintock, Brett Thomas; King, Ruth; Thomas, Len; Matthiopoulos, Jason; McConnell, Bernie J; Morales, Juan (2012-08) - Journal article
      Recent developments in animal tracking technology have permitted the collection of detailed data on the movement paths of individuals from many species. However, analysis methods for these data have not developed at a ...
    • Grey and harbour seals in France : distribution at sea, connectivity and trends in abundance at haulout sites 

      Vincent, Cécile; Huon, Mathilde; Caurant, Florence; Dabin, Willy; Deniau, Armel; Dixneuf, Stéphane; Dupuis, Laetitia; Elder, Jean-François; Fremau, Marie-Hélène; Hassani, Sami; Hemon, Audrey; Karpouzopoulos, Jacky; Lefeuvre, Cécile; McConnell, Bernie J.; Moss, Simon E. W.; Provost, Pascal; Spitz, Jérôme; Turpin, Yannis; Ridoux, Vincent (2017-07) - Journal article
      Grey (Halichoerus grypus) and harbour seals (Phoca vitulina) are sympatric seal species, but they display distinct strategies of habitat use and connectivity between haulout sites. The distribution patterns and variations ...
    • Harbor seal pup dispersal and individual morphology, hematology, and contaminant factors affecting survival 

      Greig, Denise J.; Gulland, Frances M. D.; Harvey, James T.; Lonergan, Mike; Hall, Ailsa J. (2018-10-31) - Journal article
      Understanding the factors affecting individual harbor seal (Phoca vitulina) survival is essential for determining population level health risks. We estimated postweaning dispersal, and modeled the effects of morphology, ...
    • Harbour Seal Decline - vital rates and drivers : Report to Scottish Government MMSS/002/15 

      Arso Civil, Monica; Smout, Sophie Caroline; Duck, Callan David; Morris, Christopher; Onoufriou, Joseph; Thompson, David; Brownlow, Andrew; Davison, Nicholas; Cummings, Caroline; Pomeroy, Patrick; McConnell, Bernie J; Hall, Ailsa Jane (SMRU, 2016-06) - Report
      Numbers of harbour seals (Phoca vitulina) have dramatically declined in several regions of the north and east of Scotland, while numbers have remained stable or have increased in regions on the west coast. For any management ...
    • Home range and habitat analysis using dynamic time geography 

      Long, Jed; Nelson, Trisalyn (2015-04) - Journal article
      Wildlife home ranges continue to be a common spatial unit for modeling animal habitat selection. Telemetry data are increasing in spatial and temporal detail and new methods are being developed to incorporate fine resolution ...
    • Modelling harbour seal habitat by combining data from multiple tracking systems 

      Bailey, Helen; Hammond, Philip Steven; Thompson, Paul M (2014-01) - Journal article
      Technological developments over the last 20 years have meant that telemetry studies have used a variety of techniques, each with different levels of accuracy and temporal resolution. This presents a challenge when combining ...
    • Modelling harbour seal movements 

      McConnell, Bernie J; Smout, Sophie Caroline; Wu, Mick (Scottish Government, 2017-10-11) - Report
    • Patterns of space use in sympatric marine colonial predators reveals scales of spatial partitioning 

      Jones, Esther Lane; McConnell, Bernie J; Smout, Sophie Caroline; Hammond, Philip Steven; Duck, Callan David; Morris, Christopher; Thompson, David; Russell, Deborah Jill Fraser; Vincent, Cecile; Cronin, Michelle; Sharples, Ruth Jemma; Matthiopoulos, Jason (2015-08-27) - Journal article
      Species distribution maps can provide important information to focus conservation efforts and enable spatial management of human activities. Two sympatric marine predators, grey seals Halichoerus grypus and harbour seals ...
    • Quantifying spatial-temporal interactions from wildlife tracking data : issues of space, time, and statistical significance 

      Long, Jed A. (2015) - Journal article
      New tracking technologies are allowing researchers to study wildlife movements at unprecedented spatial and temporal resolutions. Researchers now routinely deploy tracking sensors on multiple individual animals simultaneously, ...
    • Seals and shipping : quantifying population risk and individual exposure to vessel noise 

      Jones, Esther L.; Hastie, Gordon D.; Smout, Sophie; Onoufriou, Joseph; Merchant, Nathan D.; Brookes, Kate L.; Thompson, David (2017-12) - Journal article
      1.  Vessels can have acute and chronic impacts on marine species. The rate of increase in commercial shipping is accelerating, and there is a need to quantify and potentially manage the risk of these impacts. 2.  Usage ...
    • Search and foraging behaviors from movement data : a comparison of methods 

      Bennison, Ashley; Bearhop, Stuart; Bodey, Thomas W.; Votier, Stephen C.; Grecian, W. James; Wakefield, Ewan D.; Hamer, Keith C.; Jessopp, Mark (2018-01) - Journal article
      Search behavior is often used as a proxy for foraging effort within studies of animal movement, despite it being only one part of the foraging process, which also includes prey capture. While methods for validating prey ...
    • Spatial ecology of marine top predators 

      Jones, Esther Lane (University of St Andrews, 2017-06-21) - Thesis
      Species distribution maps can provide important information to focus conservation efforts and enable spatial management of human activities. Two sympatric marine predators, grey seals (Halichoerus grypus) and harbour seals ...
    • A subtropical embayment serves as essential habitat for sub-adults and adults of the critically endangered smalltooth sawfish 

      Papastamatiou, Y.P.; Dean Grubbs, R.; Imhoff, J.L.; Gulak, S.J.B.; Carlson, J.K.; Burgess, G.H. (2015-01) - Journal article
      Identifying essential habitat for large, mobile endangered species is difficult, particularly marine species where visual observations are limited. Though various methods of telemetry are available, each suffers from ...
    • Summer at the beach : spatio-temporal patterns of white shark occurrence along the inshore areas of False Bay, South Africa 

      Kock, Alison A.; Photopoulou, Theoni; Durbach, Ian; Mauff, Katya; Meÿer, Michael; Kotze, Deon; Griffiths, Charles; O'Riain, M. Justin (2018-05-22) - Journal article
      Background:  Understanding white shark (Carcharodon carcharias) habitat use in coastal areas adjacent to large cities, is an important step when formulating potential solutions to the conservation conflict that exists ...