Phototactic responses of Elachista antarctica (Phaeophyceae) spores of different ages across a broad irradiance range using new motion analysis software

Academic Article


  • Phototactic movements of Elachista antarctica spores were quantified across a wide range of irradiances from 10 to 800 μ mol photons m-2 s-1 using the recently updated version of CellTrak 1.5 motion analysis software. Spores 0-12 h old exhibited phototactic attraction at 80 and 200 μ mol photons m-2 s-1, which contributed to vertical movements up out of the boundary layer to be further dispersed hydrodynamically, but were repelled at 800 μ mol photons m-2 s-1, causing spores to retreat from detrimental irradiances. No significant effects were observed among spores released 24-36 h before measuring phototaxis at 200 and 800 μ mol photons m-2 s-1.
  • Published In

  • Botanica Marina  Journal
  • Digital Object Identifier (doi)

    Author List

  • Bucolo P; Amsler CD; McClintock JB; Baker BJ
  • Start Page

  • 639
  • End Page

  • 642
  • Volume

  • 55
  • Issue

  • 6