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Satellite Tracking

Why did animal X stop transmitting?

Derek - Manx Basking Shark Watch SPOT Tagging 2016-17

A project of Manx Basking Shark Watch.

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'Derek' a 7m long male basking shark, was tagged at 19:20 on August 14th 2016, about 4km NW off Fleshwick on the Isle of Man. He was with another male shark of about 5m length. We took skin slime samples to send to Dr Les Noble's team at Aberdeen University. Three days after we tagged him, on the 17th August, he had swum half way to Ireland and popped up to the surface for and hour and a half. He then spent some of September and October in what our tagging work has proved to be an important overwintering zone in the middle of the Irish sea before going deep for the winter and therefore not giving up any of his secrets about where he spent the winter! See the excellent scientific paper from Dougherty et al 2016 which includes MBSW satellite tag data at https://www.nature.com/articles/srep42837. In early June 2017 his tag revealed him to be in a classic basking shark hot-spot in NW Scotland. Then, on about June 6th, his tag appears to have come off 297 days after he was tagged on the Isle of Man. We stopped listening for it on 24th June 2017 but if we are lucky someone will find it and return it to us for the £50 reward. The SPOT 6 satellite tag from Wildlife Computers was generously sponsored by the Manx Lottery Trust. Funds to support the research boat were generously given by DEFA (the Isle of Man's Department of Environment, Food and Agriculture.

Background

The Manx Basking Shark Watch team put a satellite tag on a 7m long male basking shark on 14th August 2016. We named him 'Derek' after Derek Pitman, a Manx Basking Shark Watch volunteer. The shark was with another male basking shark of about 5m length.

The SPOT 6 satellite tag from Wildlife Computers was generously sponsored by the Manx Lottery Trust. Funds to support the research boat were generously given by DEFA (the Isle of Man's Department of Environment, Food and Agriculture.

  • The presentation of data here does not constitute publication. All data remain copyright of the project partners. Maps or data on this website may not be used or referenced without the explicit written consent of the data owners.
  • For more information please visit the project website.
  • This map connects positions generated by the ARGOS system designated as location class (lc) '3', '2', '1', '0', 'A', 'B'. Locations that have been "filtered" are displayed as small red dots.
  • This maps also shows locations of class 'Z', 'X' as small black dots which are not connected by a route line.
  • Bathymetry layers are derived from the GEBCO One Minute Grid.
  • Sea surface temperature and chlorophyll are derived from NASA's Ocean Color data.
  • Ocean currents and sea surface heights are derived from AVISO's Ssalto/Duacs Gridded Absolute Dynamic Topography & absolute geostrophic velocities data.

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